Common disaster recovery tools in unix and linux
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Common Disaster Recovery Tools In Unix and Linux*. Business Continuity Plans and Backups. People make IT support a complex issue! Disaster Recovery must be based on Business Continuity Plans and meet the requirements as set in the following question: What is the cost of downtime per hour?.

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Common Disaster Recovery Tools In Unix and Linux*

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Common disaster recovery tools in unix and linux

Common Disaster Recovery Tools In Unix and Linux*


Business continuity plans and backups

Business Continuity Plans and Backups

  • People make IT support a complex issue!

  • Disaster Recovery must be based on Business Continuity Plans and meet the requirements as set in the following question:

    What is the cost of downtime per hour?

Webinar


Loss of data most feared threat

Loss of Data - Most Feared Threat

Human error 35

Systems failure 31

Supply chain disruption 29

Virus, worm or other malicious attack on IT systems 28

Employee malfeasance (e.g. theft or fraud) 25

% ofrespondents

Natural disasters, such as fires or floods 22

Unplanned downtime of online systems 22

Terrorism 16

Power outage 13

Pandemic 13

Application failure 12

Industrial Action

8

Webinar


Bootable system images in unix and linux

Bootable System Images in Unix and Linux

Many tools available. For the sake of brevity,

the following will be discussed:

AIX mksysb, Network Installation Manager (NIM)

HP make_tape_recovery/make_net_recovery,

Dynamic Root Disk (DRD)*

Linux Mondo Rescue, Clonezilla

Solaris ufsdump, fssnap+ufsdump, flash/JumpStart

Tru64 btcreate

Webinar


Tape drives

Tape Drives

Limitations inherent with tape media:

  • A tape drive must be available on each system to be archived.

  • Must remove old tapes and insert new ones for new backups.

  • If an archive exceeds the capacity of a tape, you must swap tapes for both creation and extraction.

  • Must check log files and run dummy restores to ensure data consistency.

  • Tape drives are more error-prone than a local network or CD-ROM and DVD.

  • Cost of tapes in large environment is significant.

  • Cost of managing tape loading and storage is significant.

  • Generally slower that disk or LAN.

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Aix mksysb 1

AIX – mksysb(1)

Creates a backup of the operating system (root

volume group).

The file system image is in backup-file format. The

tape format includes a boot image, a bosinstall

image, and an empty table of contents followed by

the system backup (root volume group) image.

The root volume group image is in backup-file

format, starting with data files and then any

optional map files.

Webinar


Aix mksysb 11

AIX – mksysb(1)

Pros highlights:

  • For managing a single or limited number of servers.

  • Can be used for system cloning.

  • Use when servers are not networked.

  • Allows backup to tape drive (CD-ROM and DVD typically done through mkcd(1)).

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Aix mksysb 12

AIX – mksysb(1)

Cons highlights:

  • Identical tape drive is needed for an off-site recovery.

  • Cannot back up files that are mounted from a remote server.

  • If /usr is remote-mounted, you cannot reinstall system from backup image.

  • Image does not include data on raw devices or in user-defined paging spaces.

  • It may not restore all device configurations for special features, such as /dev/netbios and some device drives not shipped with the product.

  • LC_ALL environment variable should be unset (if non-C value).

  • Does not have built-in error checking to minimize problems when backing up an active file system.

  • Format specific to AIX (backup-file).*

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Aix mksysb 1 examples

AIX – mksysb(1) Examples

# mksysb –i /dev/rmt0*

# mksysb –m /dev/rmt1**

# mksysb –i –e /dev/rmt1***

# mksysb /dev/rmt0 –V

# mkcd –U –d /dev/cd0 –P –V rootvg****

# mkdvd –d /dev/cd1

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Aix mksysb 1 recovery

AIX – mksysb(1) Recovery

  • Boot off the tape drive.

  • Select option 3 “Maintenance mode for system recovery”.

  • Access your devices.

  • Restore files.

  • Boot.

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Aix nim 1

AIX – NIM(1)

  • Requires a NIM master and the number of client instances.

  • NIM depends on certain protocols (NFS, bootp or DHCP, and TFTP). Older versions of AIX also required RSH and other RCMD commands, but in AIX 5.3 and above you can use basic nimsh or openssl.

  • NIM master must be at the highest level of AIX that it is required to support.

  • Now supports Linux installations too.

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Hp ux make tape recovery 1

HP-UX – make_tape_recovery(1)

Pros highlights:

  • For managing a single or limited number of servers.

  • Can be used for system cloning.

  • Use when servers are not networked.

  • Suitable tape drive must exist.

  • Allows backup to tape drive, CD-ROM, or DVD.

  • Interactive and non-interactive.

  • Supports tar (default), cpio or pax formats.

  • Supports LVM and VxVM.

  • Multi-tape CLUI only.

  • Configurable.

  • Versions 7.x and above have ability to block particular paths and protocols during inventory (see instl_adm(4)).

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Hp ux make tape recovery 11

HP-UX – make_tape_recovery(1)

Cons highlights:

  • Identical tape drive is needed for an off-site recovery.

  • Cannot back up files that are mounted from a remote server.

  • Does not have built-in error checking to minimize problems when backing up an active file system.

  • LVM disk mirrors not restored.

  • LVM physical extents allocated to a logical volume may be in a different location on a disk than before (consider extending contiguous volumes).

  • Cannot use remote tape drive.*

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Hp ux make tape recovery 1 checks

HP-UX – make_tape_recovery(1) checks

# check_tape_recovery

# copy_boot_tape –u /dev/rmt/0mn –b –d /tmp

# lifls –l /tmp/bootimage

# mt –f /dev/rmt/0mn rew

# mt –f /dev/rmt/0mn fsf 1

# tar tvf /dev/rmt/0mn*

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Hp ux make net recovery 1

HP-UX – make_net_recovery(1)

Pros highlights:

  • For managing a large number of servers.

  • Can be used for system cloning.

  • Use when servers are networked.

  • No tape, CD-ROM, or DVD drives needed.

  • Interactive and non-interactive.

  • Supports tar (default), cpio or pax formats.

  • Highly configurable.

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Hp ux make net recovery 11

HP-UX – make_net_recovery(1)

Cons highlights:

  • Requires large space if many clients are backed up.

  • Ignite-UX bundles must be at same version on server and clients.

  • NFS used to save data to Ignite server (firewall issues, especially older versions of NFS)*.

  • Requires Ignite server for recoveries.

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Hp ux make net recovery protocols and ports

HP-UX – make_net_recovery Protocols and Ports

67 bootpd UDP2Bootstrap Protocol Server -

This service should function only if the server is a BOOTP/DHCP server

68 bootpd UDP Bootstrap Protocol Client -

This service should function only if the server is a BOOTP server

69 tftpd UDP Trivial File Transfer Protocol -

Found on systems that have Ignite-UX installed. This service should

function only if the host is being used as a TFTP server

111 portmap/sunrpc/ rpcbind TCP/UDPSUN Remote

Procedure Call (RPC)

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Hp ux make net recovery protocols and ports continued

HP-UX – make_net_recovery Protocols and Ports (continued)

135 rpcd/dced TCP Distributed Computing

Environment (DCE)-based RPC

514 shell TCP Remote Command, No Password Used

1067 instl_boots UDP Installation Bootstrap Protocol

Server

1068 instl_bootc UDP Installation Bootstrap Protocol

Client

2049 nfsd TCP/UDPNFS Remote File System

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Hp ux make net recovery protocols and ports continued1

HP-UX – make_net_recovery Protocols and Ports (continued)

2121 swagentd TCP/UDPHP Software Distributor

Daemon - Used for communication between systems for

software installation, listing, or other sw commands

4000 - 4009 secure swagent ports TCP/UDP

The swagent firewall configurable ports

49152 - 65535 Dynamic or Private Ports TCP/UDP

Dynamic and Private Ports are used by many applications for

dynamic port assignments. UDP ports in this range are often

RPC ports

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Hp ux ignite 1 examples

HP-UX – Ignite(1) Examples

# make_tape_recovery -v -a /dev/rtape/tape3 -x \

inc_entire=vg00 -d “mysrv Ignite“

# make_net_recovery -s remsrv -n 3 -P s -x inc_entire=vg00 \

-x exclude=/tmp -x exclude=/var/tmp –d “mysrv Ignite"

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Hp ux dynamic root disk

HP-UX – Dynamic Root Disk

  • DRD (current release A.3.1.0 - February 2008) runs on both Integrity and PA platforms running the following operating systems:

    HP-UX 11i v2 (11.23) September 2004 or more recent

    HP-UX 11i v3 (11.31)

  • Root group being cloned can be managed by any release of LVM on an O/S release supported by DRD. In addition, the root group can be managed by VxVM 4.1 (HP-UX 11i v2 or 11i v3) or VxVM 5.0 (HP-UX 11i v2 only).

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Hp ux drd benefit minimizing planned downtime

HP-UX DRD Benefit: Minimizing Planned Downtime

Without DRD: Software management may require extended downtime

With DRD: Install/remove software on the clone while applications continue running

Install patcheson the clone;applicationsremain running

lvol1lvol2lvol3

lvol1lvol2lvol3

lvol1lvol2lvol3

lvol1lvol2lvol3

boot disk

clone disk

boot mirror

clone mirror

vg00(active)

cloned vg00 (inactive/patched)

Activate theclone to makechanges takeeffect

lvol1lvol2lvol3

lvol1lvol2lvol3

lvol1lvol2lvol3

lvol1lvol2lvol3

boot disk

clonedisk

boot mirror

clone mirror

vg00 (inactive)

cloned vg00 (active/patched)

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Hp ux dynamic root disk1

HP-UX – Dynamic Root Disk

Pros highlights:

  • Fully supported by HP.

  • Full clone.

  • Complements other parts of total HP solution by reducing system downtime required to install and update patches and other software.

  • Copy operation is currently done by fbackup and frecover.

  • Kctune(1) command can be used to modify kernel parameters in the clone.

  • The ioconfig file and the entire /dev directory are copied by the DRD clone operation, so instance numbers will not change when the clone is booted.*

  • Supports nPars, vPars, and Integrity VMs.

Webinar


Hp ux dynamic root disk2

HP-UX – Dynamic Root Disk

Pros highlights:

  • No tape drive is needed.

  • No impact on network performance.

  • No security issues of transferring data across the network.

  • All DRD processes, including drd clone and drd runcmd, can be safely interrupted issuing Control-C (SIGINT) from the controlling terminal or by issuing kill -HUP<pid> (SIGHUP). This action causes DRD to abort processing and perform any necessary clean up. Do not interrupt DRD using the kill -9 <pid> command (SIGKILL), which fails to abort safely and does not perform cleanup.

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Hp ux dynamic root disk3

HP-UX – Dynamic Root Disk

Cons highlights:

  • VxVM 5.0 not supported in HP-UX 11.31 yet.

  • Target disk must be a single disk.

  • Not easy to list all differences between active VG and the clone.**

  • Cloning should be done when the server’s activity is quiescent.

  • Cloned disk can be used to boot another system - it is possible to do this, however, factors such as machine personality (e.g., hostname, IP address and so on) make this very difficult. HP does not recommend using the cloned disk to boot another system.

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Hp ux dynamic root disk4

HP-UX – Dynamic Root Disk

Cons:

  • Only the contents of vg00 are copied. A system that has /opt (or any file system that is patched) not in vg00 is not suitable for use with DRD.

  • Does not provide a mechanism for resizing file systems during a drd clone operation. However, after the clone is created, you can manually change file system sizes on the inactive system without needing an immediate reboot. The whitepaper, Using the Dynamic Root Disk Toolset describes resizing file systems other than /stand. The whitepaper Using the DRD toolset to extend the /stand file system in an LVM environment describes resizing the boot (/stand) file system on an inactive system image.

  • Current release of DRD does not copy the Itanium service partition (s3).

Webinar


Hp ux dynamic root disk examples

HP-UX – Dynamic Root Disk Examples

HP-UX 11.21:

# drd clone -t /dev/dsk/c2t1d0 -x overwrite=true [-x mirror_disk=/dev/dsk/c3t0d1]

HP-UX 11.31, use agile views:

# drd clone -t /dev/disk/disk32 -x overwrite=true [-x mirror_disk=/dev/disk/disk41]

Note that all partitions on Itanium disk are created

and s1 and s2 are copied.

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Hp ux dynamic root disk examples1

HP-UX – Dynamic Root Disk Examples

# drd runcmd kctune maxuprc=350

# drd runcmd swlist

# drd runcmd swinstall –s mysrv:/mydepot PHSS_01111

# drd runcmd swremove PHSS_01111

# drd runcmd view /var/adm/sw/swagent.log

Webinar


Linux mondo rescue

Linux – Mondo Rescue

Mondo Rescue is a GPL disaster recovery solution.

It supports Linux (i386, x86_64, ia64) and FreeBSD

(i386).

Packaged for multiple distributions (RedHat, RHEL,

SuSE, SLES, Mandiva, Debian, Gentoo).

Uses afio* to create cpio-format archives.

Webinar


Linux mondo rescue1

Linux – Mondo Rescue

Pros highlights:

  • GNU General Public License (GPL).

  • Supports LVM 1 and 2, RAID, ext2, ext3, JFS, XFS,

    ReiserFS, VFAT and UFS.

  • Supports tapes, disks, network and CD/DVD as backup media, multiple file systems, USB key/disks, LVM, software and hardware RAID (no more floppy support).

  • Can use used in interactive and non-interactive mode.

  • Can backup data to NFS.

  • Can move/resize/re-allocate partitions.

  • Supports GRUB and LILO boot managers.

Webinar


Linux mondo rescue2

Linux – Mondo Rescue

Cons highlights:

  • Certain packages can create problems.

  • Watch our for number of free inodes (backups can fail).

  • Long backups due to huge sparse /var/log/lastlog file.

  • Cannot handle system and hidden attributes when archiving DOS/Windows files.

  • Number of bugs: http://trac.mondorescue.org/

  • Does not support Red Hat GFS yet.

  • Does not support multipathing devices (/dev/mapper/mapthXpY).

  • Should have option to select NIC when archiving across network (currently it takes the first interface available).

  • Pre- and Post-install script support for restores.

  • Does not support bootable USB that backs up to DVDs.

  • Does not support sshfs (CloneZilla has it) and webdav.

  • Can hang if no floppy present.

  • Issues when mounting /proc in a chroot environment (for example, mount –bind /proc /var/named/chroot/proc).

  • Does not work with SELinux.

Webinar


Linux mondo rescue examples

Linux – Mondo Rescue Examples

# mondoarchive -OVr -d /dev/dvd -9 -I \

“/etc /home” –gF

# mondoarchive -OVr -d /scd0 mydir/ -0i -qF \

–s 4480m

# mondoarchive -0t –d /dev/st0

Webinar


Linux mondo rescue network recovery

Linux – Mondo Rescue Network Recovery

  • Uses network by default.

  • Boot from the Mindi mondorescue.iso and hit ENTER a few times to restore. Mindi (Mindi-Linux) makes a mini-distribution from your kernel, modules, modules, tools and libraries. It can also generate an El Torito 2.88/5.76MB boot disk image. Mondo uses Mindi to create a mini-distro, then boots from it and runs on it.

  • The ISO images can also be used for a PXE restore. For this to work, refer to the file README.pxe provided with Mindi package.

Webinar


Linux clonezilla

Linux – Clonezilla

Clonezilla is a GPL disaster recovery solution.

It supports Linux and Microsoft Windows.

Clonezilla Live: Allows you to use CD/DVD or USB flash drive to boot

and run clonezilla (unicast only).

Clonezilla server edition: A DRBL* server must first be set up in order to

use Clonezilla (Both unicast and multicast are supported).

Based on Partimage, ntfsclone and dd to clone partition. However,

clonezilla, containing some other programs, can save and restore not

only partitions, but also a whole disk.

Webinar


Linux clonezilla1

Linux – Clonezilla

Pros highlights:

  • File system supported: ext2 2, ext 3, ReiserFS, XFS, JFS, FAT, and NTFS. For these file systems, only used blocks in partition are saved and restored. For unsupported file system, sector-to-sector copy is done by dd in Clonezilla.

  • LVM 2 is supported.

  • Multicast is supported in Clonezilla server edition, which is suitable for massive cloning. You can also remotely use it to save or restore machines if PXE and Wake-on-LAN are supported in your clients.

Webinar


Linux clonezilla2

Linux – Clonezilla

Cons highlights:

  • LVM 2 is supported but LVM 1 is not.

  • Multicast is supported in Clonezilla server edition, which is suitable for massive cloning. You can also remotely use it to save or restore machines if PXE and Wake-on-LAN are supported in your clients.

  • Due to the limitations of program mkisofs , ocs-iso can not process an image file larger than 4.5 GB. For this reason, if your image is larger than 4.5 GB, ocs-iso will refuse to process it.

Webinar


Linux clonezilla examples

Linux – Clonezilla Examples

# /opt/drbl/sbin/ocs-live

# /opt/drbl/sbin/ocs-iso myimage*

# /opt/drbl/sbin/ocs-iso -g en -t -k NONE -e "-g auto -b -c restoredisk myimg2 hda" myimg2**

# /opt/drbl/sbin/ocs-iso image3 image4

# /opt/drbl/sbin/ocs-iso -g en -k NONE -s -m ./cust-ocs***

# /opt/drbl/sbin/ocs-live-dev -g en -k NONE -s -c -m ./cust-ocs***

Webinar


Solaris ufsdump 1

Solaris – ufsdump(1)

Pros highlights:

  • Easier to restore individual files.

  • Allows you to choose directories to back up.

  • Allows you to back up entire system.

  • Allows backup to tape drive (both local and remote!), CD-ROM, file, or diskette.

  • Supports UFS and VxFS.

  • Portable to other versions of dump/restore.

  • Interactive and non-interactive.

Webinar


Solaris ufsdump 11

Solaris – ufsdump(1)

Cons highlights:

  • Backs up single file system only – you must enter multiple ufsdump commands to back up data.

  • Possible errors when backing up open files.*

  • Cannot automatically calculate number of tapes need.**

  • Cannot back up files that are mounted from remote server.

  • Does not have built-in error checking to minimize problems when backing up an active file system.***

  • Not efficient in tuning transfer rates to tape drive.

  • Ufsrestore requires some prior knowledge of disk partitioning.

  • Does not support ZFS.

Webinar


Solaris ufsdump 1 comparison with hp ux ignite

Solaris – ufsdump(1) Comparison with HP-UX Ignite

  • make_tape_recovery creates a bootable tape. There is no need to boot of the installation CD-ROM or DVD.

  • make_tape_recovery does not require to partition the boot disk manually in recovery process.

  • make_tape_recovery is fully automated.

  • Solaris ufsdump resembles fbackup in HP-UX.

Webinar


Solaris ufsdump 1 examples

Solaris – ufsdump(1) Examples

# ufsdump 0f - /dev/rdsk/c0t2d4s5 | \

( cd /home && ufsrestore xpf -)

# ufsdump 0uf /dev/rmt/1cn /dev/rdsk/c3t1d2s1

# ufsdump 0f /home/etc.dmp /etc

# ufsdump 0f – /dev/md/rdsk/d33 | \

ssh remsrv “dd obs=32k ibs=32k of=/dev/rmt/0n”

# ufsdump 0ucf remsrv:/dev/rmt/0 /usr

Webinar


Solaris ufsrestore 1 example

Solaris – ufsrestore(1) Example

1.Boot from the media at OBP prompt:

ok boot -s cdrom

2. Format the new boot disk.

3. Newfs each of the partitions on the boot disk

that are to be restored:

# newfs /dev/rdsk/c0t0d0s0(/)

# newfs /dev/rdsk/c0t0d0s3(/usr)

# newfs /dev/rdsk/c0t0d0s4(/var)

# newfs /dev/rdsk/c0t0d0s5(/tmp)

4. Each slice should be fsck to make sure newfs

worked.

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Solaris ufsrestore 1 example continued

Solaris – ufsrestore(1) Example (continued)

5. Mount all slice to be restored (do not mount or restore swap):

# mount /dev/dsk/c0t0d0s0 /a

# cd /a

# ufsrestore rvf /dev/rmt/0n

# rm restoresymtable

# mount /dev/dsk/c0t0d0s3 /a/usr

# mount /dev/dsk/c0t0d0s4 /a/var

# mount /dev/dsk/c0t0d0s5 /a/tmp …

# cd /a/usr

# ufsrestore rvf /dev/rmt/0n …

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Solaris ufsrestore 1 example continued1

Solaris – ufsrestore(1) Example (continued)

6. Unmount the file systems:

# cd /

# umount /a/usr

# umount /a/var …

7. For Solaris 2.5 and greater, run the installboot(1) program to re-install the boot block:

# cd /usr/platform/`uname -i`/lib/fs/ufs

# installboot bootblk /dev/rdsk/c0t0d0s0

8. Check the file systems:

# fsck /dev/rdsk/c0t0d0s0

# fsck /dev/rdsk/c0t0d0s3 ...

9. Reboot the server.

Webinar


Solaris flash 1

Solaris – flash(1)

Pros highlights:

  • Creates archives in cpio (default) or pax formats. Use “-L pax” for flarcreate(1) if individual files are larger than 4 GB.

  • Can create differential archives (flag “-A unchanged_master_image_dir”).

  • Customisable.

  • Flash archives can be copied to NFS, HTTP or HTTPS server, FTP server, tape, CD-ROM, DVD, diskette, and local drive of clone system.

  • Non-interactive.

Webinar


Solaris flash 11

Solaris – flash(1)

Cons highlights:

  • Flash creation software removes all RAID-1 volume information from the archive to keep the integrity of the clone system.

  • VxVM stores configuration information in areas not available to Solaris Flash. If VxVM file systems have been configured, do not create Flash archives.

  • Active sockets (like /var/tmp/orbit-* directories) can cause flash failures).

  • The master system and the clone systems must have the same kernel architectures.

  • Soft partitions not handled properly.

Webinar


Solaris flash 12

Solaris – flash(1)

Webinar


Solaris jumpstart protocols and ports

Solaris – JumpStart Protocols and Ports

TCP and UDP 37 (time)

UDP 67 (bootp/DHCP)

UDP 69 (TFTP)

TCP and UDP 2049 (NFSv4)

TCP and UDP 4045 (lockd, may not be needed)

UDP 111 (Sun RPC)

Webinar


Solaris flash 1 examples

Solaris – flash(1) Examples

#flarcreate -n mysrv.flar -c -S -R / -t /dev/rmt/2*

# flar info -t /dev/rmt/2

files_archived_method=cpio creation_date=200802171923517 creation_master=mysrv content_name=mysrv.flar creation_node=mysrv creation_hardware_class=sun4u creation_platform=SUNW,Sun-Fire-T200 creation_processor=sparc creation_release=5.10 creation_os_name=SunOS creation_os_version=Generic_118833-36 files_compressed_method=none content_architectures=sun4u

# flarcreate -n “mysrv" -S /mysrv.flar

Webinar


Solaris flash 1 restore example

Solaris – flash(1) Restore Example

  • If you want to install the system using a flash archive, select Initial option. Follow the prompts and answer questions.

  • Options offered:

    F2_Upgrade F3_Go Back F4_Initial F5_Exit F6_Help

    Select F4_Initial.

  • Select Solaris Interactive Installation (Menu 2). Follow the prompts and answer questions.

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Solaris flash 1 restore example continue

Solaris – flash(1) Restore Example (continue)

  • Options offered:

    F2_Standard F3_Go Back F4_Flash F5_Exit F6_Help

    Select F4_Flash and follow the prompts:

    Flash Archive Installation Method

    Available Retrieval Methods

    [ ] HTTP -> default

    [ ] NFS

    [ ] Local File

    [X] Local Tape -> selected

    [ ] Local Device

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Solaris flash 1 restore example continue1

Solaris – flash(1) Restore Example (continue)

F2_Continue F5_Cancel F6_Help

Preserve Data?

F2_Continue F3_Go Back F4_Preserve F5_Exit F6_Help

File System and Disk Layout

F2_Continue F3_Go Back F4_Customize F5_Exit F6_Help

Mount Remote File Systems?

F2_Continue F3_Go Back F4_Remote Mounts F5_Exit F6_Help

Webinar


Solaris flash 1 extract files

Solaris – flash(1) Extract Files

#flar split mysrv.flar

# ls

archive identification predeployment summary

cookie postdeployment reboot

# cpio –it <archive | grep myfile

export/home/somefile

# cpio –ivdm export/home/somefile <archive

Webinar


Solaris bootable jumpstart installation cd rom

Solaris – Bootable JumpStart Installation CD-ROM

http://www.sun.com/blueprints/0301/BuildBoot.pdf

http://mah.everybody.org/docs/bootable-cdrom-for-solaris/

Webinar


Solaris fssnap 1

Solaris – fssnap(1)

Create a snapshot of a file system:

The block special device created for the snapshot is

/dev/fssnap/0

# fssnap -F ufs -o backing-store=/var/tmp/snap /home /dev/fssnap/0

NOTE: Do not use tmpfs (/tmp) for backing store!

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Solaris fssnap 1 continued

Solaris – fssnap(1) (continued)

Backing up a file system snapshot without

unmounting the file system:

Since ufsdump requires the path to a raw device,

the raw option is used. The /home file system

snapshot is then removed

# ufsdump 0uf /dev/rmt/0 `fssnap -F ufs -o raw,bs=/dev/rdsk/c2t1d0s6 /home

# fssnap -F ufs -d /home

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Solaris fssnap 1 continued1

Solaris – fssnap(1) (continued)

Backing up a file system:

When backing up a file system, do not let the

backing-store file exceed 400 Mbytes. The second

command removes the /home file system snapshot

# ufsdump 0uf /dev/rmt/0 `fssnap -F ufs -o maxsize=400m,backing-store=/var/tmp/snap,raw /home`

# fssnap -F ufs -d /home

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Solaris fssnap 1 continued2

Solaris – fssnap(1) (continued)

Incremental dump of a file system:

# ufsdump IfNu /dev/rmt/0 /dev/rdsk/c0t3d0s2 \

`fssnap -F ufs -o raw,bs=/var/tmp/scratch,unlink \

/dev/rdsk/c0t3d0s2`

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Solaris fssnap 1 continued3

Solaris – fssnap(1) (continued)

Listing available snapshots:

# fssnap -i

0 /var

1 /home

2 /usr/local

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Solaris fssnap 1 continued4

Solaris – fssnap(1) (continued)

Display snapshot details:

# fssnap -i -o backing-store-len,backing-store,createtime /home

196608 /var/tmp/snap2 Thu Feb 13 16:35:28 2008

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Solaris fssnap 1 continued5

Solaris – fssnap(1) (continued)

Mount file system snap:

Create a file system snapshot. Then, mount it on

/tmp/myfs for temporary read-only access

# fssnap -F ufs -o backing-store=/var/tmp/scratch /home /dev/fssnap/1

# mkdir /somefilesystem/myfs

# mount -F ufs -o ro /dev/fssnap/1 /somefilesystem/myfs

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Solaris containers flash archives

Solaris Containers – Flash Archives

  • All zones must be stopped when the flash archive is made from the global zone.

  • If the source and target systems use different hardware configurations, device assignments must be changed after the flash archive is installed.

  • Soft partitions in SVM cannot be flash archived yet.

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Tru64 btcreate 1

Tru64 – btcreate(1)

Pros highlights:

  • Can create bootable Standalone System (SA) kernel on tape for UFS and ADVFS.

  • Interactive and non-interactive backups.

    Cons highlights:

  • Specific to Tru64.

  • Identical tape drive is needed for an off-site recovery.

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Tru64 btcreate 11

Tru64 – btcreate(1)

  • The tape consists of a tape boot block, a specialized kernel, a stripped-down operating system, and a backup of your system partitions. Once it is created, complete restores are as simple as booting the prepared tape from the console:

    >>> init>>> show dev>>> boot -fl "nc" MKA400

  • Because the facility utilizes dump or vdump, the normal caveats apply. Ideally, you should create the tape while the system is in single-user mode:

    # /usr/sys/bin/btcreate -f -k MYKERNEL -m mfs -t nrmt1h \

    -s /nfsdrive/btcreate.mykernel

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Tru64 bootable cd for nhd7 tru64 5 1b on alpha ds 15 server

Tru64 – Bootable CD for NHD7 Tru64 5.1B on Alpha DS 15 server*

  • Copy the files from the CD in a directory ("BUILD“)

  • Add the "ds15kernel" file

  • Then run the following Tru64 command's:

    # cd BUILD

    # mkisofs -D -R -d -o -b -quiet -p "your name" \

    -P "your org." -V "V5.1Br2650_O1" -o ../TRU64DS15.iso .

    # disklabel -w -t cdfs -f ../TRU64DS15.iso

    # echo "\0\c" || dd bs=1024k conv=sync >> ../TRU64DS15.iso

  • Copy the ISO to a PC with a CD burner and burn the image to CD-R

  • Put the cd into your DS15, and boot it using:

    P>>> b -file ds15kernel dqa0

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Bare metal recovery selected commercial products

Bare Metal Recovery – Selected Commercial Products

  • HP Data Protector Express offers extended platform support with six different Bare Metal Disaster Recovery methods (integrated into the product). Supports Linux, Windows, and NetWare.*

  • Symantec (Veritas) Bare Metal Restore. Part of Enterprise NBU 6.5. Includes support for AIX, HP-UX, Solaris, Linux, and Windows (why would anyone use the latter?).

  • IBM Tivoli Storage Manager for System Backup and Recovery (for AIX 5.x only). Supports full system (installation image), volume group, file system (JFS, JFS2, NFS, CDFS), file or directory, and raw logical volume.

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Bare metal recovery commercial products

Bare Metal Recovery –Commercial Products

  • EMC Home Base.

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Bare metal recovery commercial products1

Bare Metal Recovery –Commercial Products

  • UniTrends Data Protection Unit (appliance).

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Where to find more information

Where to Find More Information

  • AIX mksysb:

    http://publib.boulder.ibm.com/infocenter/clresctr/vxrx/topic/com.ibm.cluster.csm16010.install.doc/am7il_mksysb.html

  • AIX script to automate mksysb via NIM:

    http://www.unix.com/shell-programming-scripting/47006-script-automate-mksysb-via-nim-aix-5-3-a.html

  • AIX FAQ:

    http://www.faqs.org/faqs/aix-faq/

  • Symantec (Veritas) Bare Metal Restore:

    http://www.symantec.com/products/

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Where to find more information1

Where to Find More Information

  • HP-IX Ignite:

    http://docs.hp.com/en/IUX/

  • Tru64 btcreate:

    http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V51B_HTML/MAN/MAN8/0043____.HTM

  • Tru64 bare metal recovery:

    http://www.backupcentral.com/components/com_mambowiki/index.php/Tru64_Bare_Metal_Recovery

  • Backup Central:

    http://www.backupcentral.com/

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Where to find more information2

Where to Find More Information

  • EMC HomeBase:

    http://www.emc.com/solutions/samples/backup-recovery-archiving/bare-metal-recovery.htm

  • HP Data Protector Express:

    http://www.hp.com/go/dataprotectorexpress

  • Mondo Rescue:

    http://www.mondorescue/org/

  • Mondo Rescue hardware migration:

    http://www.mondorescue.com/docs/hwmigration-2.3.pdf

  • Solaris Flash:

    http://www.sun.com/bigadmin/content/submitted/flash_archive.jsp

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Where to find more information3

Where to Find More Information

  • Diskless Remote Boot in Linux:

    http://drbl.sourceforge.net/

  • Clonezilla:

    http://clonezilla.sourceforge.net/

  • HP-UX Dynamic Root Disk:

    http://docs.hp.com/en/DRD/faq.html

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