atlanta pc user group wednesday 9 october 2013
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Back Up Your Data. Atlanta PC User Group Wednesday, 9 October 2013. Someone once said:. If your colleagues think you are paranoid about backing up your data….. you may be doing it right, but probably not. Philosophy 3-2-1.

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atlanta pc user group wednesday 9 october 2013

Back Up Your Data

Atlanta PC User Group

Wednesday, 9 October 2013

someone once said
Someone once said:

If your colleagues think you are paranoid about backing up your data….. you may be doing it right, but probably not.

philosophy 3 2 1
Philosophy 3-2-1

3 copies of anything you care about - Two isn\'t enough if it\'s important.

2 different formats - Example: Dropbox+DVDs or Hard Drive+Memory Stick or CD+Crash Plan, or more

1 off-site backup - If the house burns down, how will you get your memories back?

these are not backups
These are not backups:
  • Backing up your laptop to an SD Card in the same laptop is #notabackup
  • Backing up to a hard drive that is 6 inches away from your computer is #notabackup
  • Backing up your Gmail to another Gmail account is #notabackup
  • Backing up your book by copying it to another folder is #notabackup
  • The photos that are still in your camera memory are #notabackup
make a plan
Make a Plan
  • Take stock of your data
  • Decide how much it is worth
  • Determine the methods and frequency
  • Stick to it religiously
a plan
A Plan
  • Automatic nightly clone of entire drive to another drive.
  • Automatic versioned backups to Time Machine in basement.
  • Automatic nightly clone of home directory to Amazon S3.
  • I get bent out of shape when people whine about a crashed system.
  • Plan for it. It is inevitable. 11/16/12 1:45pm
taking stock
Taking Stock
  • How much data do I have?
  • How much is actual data
  • How much is applications
  • How much is “meta-data”
  • How much is junk
how much is it worth
How much is it worth?
  • If my disk got “toasted” in a fire, would I pay $2,500 to have it recovered? $1,000? $500? Eh, c’est la vie!
  • Do I have 50 GB of logs that will be re-created anyway?
  • Do I need 20 versions of my documents?
  • Do I have licenses for all my software enabling me to re-install with a simple download?
  • There are many ways to think about this
  • You should use several of them in combination for your plan
  • There are also dependencies upon the type of system:
    • Windows
    • Mac OS
    • *ix
physical vs logical
Physical vs. Logical
  • Physical takes an image of the complete disk that is ready for restoring to a new disk.
  • Physical backups do not care what is on the disk – every bit is copied to the image, even though only a fraction of the disk contains data
  • It can be compressed and encrypted for security purposes.
  • Makes for the fastest full restore
physical vs logical cont d
Physical vs. Logical (cont’d)
  • Logical backs up only the bits that are used
  • It depends upon some sort of VTOC or directory
  • Typically the fastest backup
  • Depending upon technique, could be the fastest restore
  • Great for file versioning and old version recovery
whole vs incremental
Whole vs. Incremental
  • Whole usually refers to logically copying a file, be it a data file or application
  • Whole also refers to the whole disk sometimes
  • Incremental refers to pieces of the file or disk
    • If a file spans some boundary, such as sectors, and only one sector changed, just copy that
    • If physically copying a disk and only one sector changed, just copy that one
versioning archiving
Versioning & Archiving
  • Do I keep multiple copies of the file or disk I am backing up.
    • If I wish to “version” a disk, I need multiple disks
    • If I wish to “version” a file, I need extra space
  • Some allow versioning as long as there is space and then start dropping the oldest version
operating systems
Operating Systems
  • Windows is the toughest and least flexible
  • For purposes of our discussion, you have:
    • Data – easily backed up
    • Applications – not easy if at all
    • Registry – too much hardware dependency
  • The best Windows scheme is image copying and just copying data – make sure you have your licenses to re-install programs
operating systems cont d
Operating Systems (cont’d)
  • Mac OS X is easier to back up
    • Images work like Windows, either full disk or incremental
    • Data is clearly stored
    • Application “packages” can be copied and restored
  • For some reason there seems to be a wider choice of backup software, also
operating systems cont d1
Operating Systems (cont’d)
  • *ix systems are not much different than Mac OS X - or should I say the other way around – Mac OS X is based upon BSD Unix
  • Application “packages” are even better maintained, for the most part:
    • Ubuntu
    • CentOS
    • Red Hat
    • About 50 others
  • Windows
    • Acronis – the best all-around image and partition management software, capable of full image, incremental, encoding, compression, and most any other feature found in any backup software. We are getting a discount code for everyone.
    • Synctoy – free from Microsoft, excellent for small volumes
  • Mac OS X
    • SuperDuper – both logical incremental image and logical files, clocks, calendars, full restore variations, encryption, compression, etc.
    • Carbon Copy Cloner – as far as I can tell, a clone of SuperDuper with all the bells and whistles
    • Time Machine (Apple) – full versioning with a space limit, one of the few that can do full disk restore, also
  • *ix
    • R is the only one I am familiar with and wish I knew more, here. It is FLOSS.
  • Carbonite – platform independent, backs up everything on your internal disk or disks – no external disks, can encrypt and has full file restore ability with limited versioning, runs in background
  • Crashplan – backs up your internal and external disks (same price), keeps five or ten versions, will restore to a specific time and date by file or complete disk, runs in background. Has a free mode where you and a friend can back up to disks at each other’s location, and a family plan for up to 10 computers.
nass raid
  • Drobo is an example of a NAS and RAID
  • Proprietary software
  • Console monitoring
  • Multiple bays – five, up to 20 or 32 (?)
  • Each bay with different size drives up to 4 TB
  • Network support
nass raid cont d
NASs & RAID (cont’d)
  • Multiple bay failure support
    • 1 of 4 bays, 6.7 TB available of 8 TB
    • 2 of 5 bays, about 7.5 TB of 10 TB
  • Has its own backup utility, but I did not bother
  • Platform independent
disk warrior
Disk Warrior
  • Boot from Disk Warrior
  • Ignores logical data
  • Builds own directory
  • Asks you to check it before putting it on the disk
  • Actually corrects some physical errors
  • Google article
    • Abstract
    • Article
  • Synctoy
  • Acronis – discount code coming
  • SuperDuper-
  • Carbon Copy Cloner -
notes cont d
Notes (cont’d)
  • “Why You Should Always Have More Than One Backup”, Lifehacker,
  • “The Computer Backup Rule of Three”