raid basics n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
RAID Basics PowerPoint Presentation
Download Presentation
RAID Basics

Loading in 2 Seconds...

play fullscreen
1 / 32

RAID Basics - PowerPoint PPT Presentation


  • 158 Views
  • Uploaded on

RAID Basics. Speaker: Edgar Lin. April, 2009. Agenda. What is RAID? RAID Level & Comparison Interface (Host/Disk) RAID Structure Configuration & Monitoring Graphic User Interface Comparison Storage Provisioning / Performance profile Feature Highlight RAIDGuard Central Snapshot

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'RAID Basics' - allegra-pope


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
raid basics

RAID Basics

Speaker: Edgar Lin

April, 2009

agenda
Agenda
  • What is RAID?
    • RAID Level & Comparison
    • Interface (Host/Disk)
  • RAID Structure
    • Configuration & Monitoring
    • Graphic User Interface Comparison
    • Storage Provisioning / Performance profile
  • Feature Highlight
    • RAIDGuard Central
    • Snapshot
    • PathGurard MPIO
    • Advanced Functions
  • Technical Support Flowchart
    • Update Firmware
    • Trouble Shooting

2

what is raid
What is RAID?
  • RAID is an acronym first used in a 1988 paper by Berkeley researchers Patterson, Gibson and Katz.
  • Redundant Array of Independent Disk (RAID) is a storage technology used to combine multiple inexpensive drives into a logical drive to obtain performance, capacityand reliabilityover single-disk storage.

3

slide4

Block 1

Block 1

Block 1

Block 2

Block 2

Block 2

Block 3

Block 3

Block 3

Block 4

Block 4

Block 4

Block 5

Block 5

Block 5

Block 6

Block 6

Block 6

Block 1

Block 2

Block 3

Block 1

Block 1

Block 1

Block 1

Block 2

Parity (1,2)

Mirror

Mirror

Block 4

Block 5

Block 6

Block 2

Block 2

Block 2

Block 3

Block 4

Parity (3,4)

Block 7

Block 8

Block 9

Block 3

Block 3

Block 3

Block 5

Block 6

Parity (5,6)

Block 1

Block 1

Block 2

Block 2

Block 3

Block 3

Block 4

Block 4

Block 5

Block 5

Block 6

Block 6

Block 7

Block 8

Block 9

Block 1

Block 2

Parity (1,2)

Block 3

Parity (3,4)

Block 4

Block 1

Block 2

Block 3

P (1,2,3)

Q (1,2,3)

Parity (5,6)

Block 5

Block 6

Block 4

Block 5

P (4,5,6)

Q (4,5,6)

Block 6

Block 7

P (7,8,9)

Q (7,8,9)

Block 8

Block 9

RAID level description

RAID 3 – Disk Striping with dedicated parity

RAID 0 – Disk Striping

RAID 1 – Disk Mirroring

RAID 5 – Disk Striping with distributed parity

RAID 6 – Disk Striping with 2sets of distributed parities

4

slide5

1610G

500G

250G

160G

300G

400G

160 GB

250 GB

300 GB

400 GB

500 GB

160 GB

250 GB

300 GB

400 GB

500 GB

Block 1

Block 1

Block 2

Block 2

Block 3

Block 3

Block 4

Block 4

Block 5

Block 5

Block 6

Block 6

Block 7

Block 8

Block 2

Block 2

Block 1

Block 1

Mirror

Mirror

Mirror

Mirror

Block 4

Block 4

Block 3

Block 3

Block 6

Block 6

Block 5

Block 5

Block 1

Block 3

Parity (1,3)

Block 4

Parity (2,4)

Block 2

Block 5

Block 7

Parity (5,7)

Block 8

Parity (6,8)

Block 6

RAID level description

JBOD – Just a Bunch of Disks

NRAID – Non RAID

RAID 10 – Disk striping with Mirroring

RAID 30/50/60 – combination of RAID 0 and RAID 3/5/6

5

slide6

Overview of RAID levels

R: Redundant / JanusRAID II J: JanusRAID P: PCI-e I: iSCSI

6

interface host disk
Interface (Host/Disk)
  • Host Interface
    • SCSI (VHDCI, HD68)
    • SAS (3 Gbits, 6 Gbits)
    • Fibre(1 Gbits, 2 Gbits, 4 Gbits, 8 Gbits)
    • iSCSI (Gigabit,10G Ethernet)
    • PCI-e (PCI-e x4 x8 ...)
  • Disk Interface
    • Serial
      • SATA (1.5 Gbit/s, 3 Gbit/s)
      • SAS (3 Gbit/s, 6 Gbit/s)
    • Parallel
      • PATA (PIO, DMA, Ultra DMA 33/66/100/133)
      • SCSI (SCSI-1, SCSI-2, Ultra, Wide, Ultra2, Ultra3, Ultra 320)

7

slide8

2U 8bays

2U 6bays

SCSI-SATA II

PCIe-SATA II

NAS-SATA II

Tower 8bays

SCSI-SATA II

Tower 4bays

PCIe-SATA II

eSATA-SATA II

1394/USB-SATAII

RAID system solution

4U 24bays

R: Redundant controller

S: Single controller

4U 24bays

3U 16bays

3U 16bays

SAS-SAS/SATA II (R)

FC 4G-SAS/SATA II (R)

SCSI-SATA II

PCI-e-SATAII

2U 12bays

JBOD-SAS/SATA II (R)

SAS-SAS/SATA II (R/S)

FC 4G-SAS/SATA II (R/S)

SCSI-SATAII

iSCSI-SAS/ SATA II

PCI-e-SATAII

JBOD-SAS/SATA II (R/S)

SAS-SAS/SATA II

FC 4G-SAS/SATA II

SCSI-SATA II

iSCSI-SAS/SATA II (2U 8/12bays)

PCI-e-SATAII

Tower 8bays

Tower 4bays

SCSI-SATA II

NAS-SATAII

8

raid structures

Logical Units

 Logical Units (LUN)

Volumes

 Volumes

Logical Disks

 Logical disk (LD)

Disks Groups

 Disk group ( DG)

 Local spare and global

spare disk

Local

Spare

JBOD

Disks

Global

Space

Unused

Disks

RAID Structures
  • Virtual disk
  • LUN mapping

Hard Disks

The storage resources are managed as storage objects in a hierarchical structure.

10

slide10

RAID Configuration and Monitoring

  • LCD & button:
    • All RAID systems have a front LCD panel which supports a quick configuration and RAID monitoring
  • Web-GUI
    • Open a browser and enter the IP address in the address field.
    • Check IP address on LCD. (Default is DHCP enable. If no DHCP server exists, RAID system will assign an IP automatically.) Supported browsers:
      • IE 6.x and above SAS
      • FireFox 1.x and above
      • Safari 1.x and above
  • Web-GUI includes 2 modes,
    • “Monitor mode”: for monitoring most status of RAID system
    • Config Mode”: password needed to configure RAID system manually.

11

1st gen gui
1st Gen GUI

2nd Gen GUI

PCI-e GUI

13

raid configuration
RAID Configuration

To configure any settings under Config. Mode, log in with admin and its password.

The Overview screen displays as below.

The Config. Mode provides the following configuration settings

14

slide14

RAID System setup

RAID Flow Chart

Open Web-GUI

Advanced Array Setup

Set Time

JBOD

RAID or JBOD?

Set JBOD disk

Change admin’s password & set reminding email

RAID

Set DG (Disk Group)

Insert Disk and run Disk-Self-Test

Set LD (Logical Disk)

- RAID 0/1/3/5/NRAID

Quick Array Setup

Yes

RAID 30/50/60 ?

Set Vol(Volume)

Set array by LCD/Web-GUI

No

Set Performance Profile

Mapping to LUN - Storage Provision

Connect to host server and start to use

15

slide15

LUN 0

(DG0 LD0)

Host port 1

Host port 1

LUN 0

(DG0 LD0)

LUN 1

(DG1 LD1)

LUN 2

(VOL 3)

LUN 3

(JBOD 2)

Simple

(DAS)

Symmetric

(MPIO)

LUN 0

(DG1 LD1)

Host port 2

Host port 2

LUN 2

(DG0 LD0)

LUN 3

(DG0 LD2)

LUN 4

(VOL 2)

LUN 5

(DG0 LD1)

Host 0

LUN 6

(JBOD 5)

LUN 8

(DG3 LD3)

Host 3

Host 4

Selective

(SAN)

SAN

Environment

LUN 9

(DG2 LD0)

LUN 10

(DG2 LD2)

LUN 9

(DG2 LD0)

LUN 10

(DG2 LD2)

HG1:Host 5, Host 6 ….

Host 5

Host 6

LUN 13

(VOL 4)

LUN 14

(VOL 5)

LUN 15

(VOL 6)

LUN 16

(VOL 7)

Host 7

Host 8

(Host Group)

(Storage Group)

Storage Provisioning

16

slide17

Features Highlight

  • RAIDGuard Central
  • Snapshot
  • PathGuard MPIO
  • Advanced Function

18

slide18

RAIDGuard Central Features -1

Ethernet Switch

․․․

  • Centralized Monitoring

19

slide19

Fan Error

Fan Error

Error

RAIDGuard Central Features -2

  • Event notice
  • Mail and MSN

inform

Ethernet Switch

․․․

20

slide20

Config. RAID 5

Config. RAID 5

Config. RAID 5

Config. RAID 5

RAIDGuard Central Features -3

Ethernet Switch

․․․

  • Centralizing configuration

21

slide21

RAIDGuard Central Features

  • Centralized monitoring:

New RAIDGuard Central could monitor hundreds of Arena RAID at the same time. Best way to control multiple installations.

  • Advanced Event notice :

All systems could send error message to center server. Easy to know immediately which unit needed to be proper maintained.

  • Mail and MSN inform :

Allow customer to warning the engineer real-time with mail sending and most popular web messenger: MSN.

  • Centralizing Configuration:

Maintain/ configure multiple Arena RAID to save the most time on system integration and supports.

  • Compatible Models:Janus II, Redundant

22

slide22

Saving Data

Snapshot Features -1

12:00

1:00

2:00

3:00

Timeline

1:00 status

Virus

Roll Back

Data Restore

  • Instant copy
  • Multiple copies
  • Instant recovery
  • Data Rollback

23

slide23

Snapshot Features -2

  • Instant Copy :

Copy on the scheduled time of the date. Customers can define how much and when they feel data is important

  • Multiple copies:

Snapshot can create multiple return point with change only- it means without lot’s efforts on RAID and no loading on server

  • Instant Recovery:

No down time needed. Work instantly online. No performance impact and also no requirement to rebuild or try to data rescue.

  • Data Rollback:

Snapshot allow you to rollback/ recover to the nearest point of time. Only little data loss for time being.

  • Compatible Models:iSCSI, PCI-e, Janus II, Redundant

24

slide24

PathGUard ™ MPIO Features -1

Server

Host 1 Host 2

Server

Host 1 Host 2

Before

After

Path Guard

Double Bandwidth

Boost up

Performance

  • Load balancing
  • Boost up performance

25

slide25

PathGUard ™ MPIO Features -2

Server

Host 1 Host 2

Server

Host 1 Host 2

Path Guard

Fail Over

Fail back

After check

Fail

Re-Connect/ Change cable

  • Fail over
  • Fail back

26

slide26

PathGuard™ MPIO Features

  • Load balancing:

Add both bandwidth boost up performance. Improve server and application performance and data availability

  • Fail-over:

Automatic recovery from path fails. Improve application availability and enhances performance

  • Fail-back:

Real-time detect and auto switching back while the other path is back. Improve application and server availability

  • Auto detection and performance policy:

Tunable policy to optimize performance for specific application. Such as video editing or video surveillance.

  • Compatible Models:Janus, Janus II, Redundant

27

slide27
Bad Block Alerts

SMART

Disk Cloning

Scrubbing

Disk Spin Down

Array Roaming

Array Recovery

Work

Bad Block

Access

NO

Access

ZZZ… REST

Fail

Health

OK

Sick

Working

Fix &

Recover Data

Disk Fail

Spare Copy

2nd Fail

Array Recovery

RAID 5

Sick

Stop

Repaired

Advance Function

28

vendor tools
Vendor Tools
  • Green Software (No Installation)
  • Multiple RAIDs Firmware Update
  • Multiple RAIDs Bootcode Update
  • Windows Based
  • Central Management

30

technical support flowchart
Technical Support Flowchart

Support

Question

RMA

Yes

No

Enough

Information ?

Hardware?

Analyze

Problem

Solved

Software

Debug

Yes

No

Compatible

Issues

Consult

3rd Party

31

trouble shooting
What is the problem?

When it occurred?

Where is the problem?

Why happen this problem?

RAID

Model,

FW, Boot Code

Memory, Hard Disk

RAID Level

Host

OS, Model, Memory, CPU

Trouble Shooting

4W, 1H

Info

  • Connection
    • HBA, SFP, Terminator
    • External & Internal Cable
  • Message
    • LCD & Terminal Message
    • GUI (.BIN, .CSV, .html)
    • OS Event Log
  • How to occur or duplicate the problem?

32

slide32

a more powerful way for storage

a more powerful way for storage

33