Sun Storage 6920 System
 

GCS>Sun Microsystems>Storage - Disk>Modular Disk - 6xxx Arrays
 

The purpose of this document is to provide basic steps for snapshot
modification for the 6920 array, via the Browser User Interface(BUI) or
sscs Command Line Interface(CLI).

Content will be limited to a basic usage using the CLI or BUI interfaces
for modifying snapshots, and provide help with some usage failure scenarios
for this activity. Consider reviewing some of the following documents if you
are looking to perform actions beyond the scope of this document:

• Best Practices for the Sun StorEdge 6920 System, Version 3.0.1
• Sun StorEdge 6920 System CLI Quick Reference Guide, Release 3.0
• <Document: 1009915.1> : Troubleshooting Sun StorEdge[TM] 6920 Configuration Problems
• Sun StorEdge 6920 System Administration Guide For the Browser Interface Management Software, Release 3.0

A. Start By Planning

Volume layout planning and considerations should be reviewed by
answering the following questions before modifying your volume:

1. Will you be changing the Volume/Snapshot policy?
2. Will you be renaming your snapshot?
3. Will you be changing the snapshot description?
4. Will you be changing the snapshot count?
5. Will you be changing the snapshot level?
6. Will you be resnapping?
7. Will you be performing a snapshot rollback?

After answering these questions please review the contents of the Best Practices for the Sun StorEdge 6920 System, Version 3.0.1, and identify that you are prepared with at least:

• The policy to favor
• The new name of the snapshot
• The new description of the snapshot
• The new snapshot count
• The new snapshot level
• The snapshot to rollback

If all the information above is provided, continue to Step B

B. Basic Usage of Browser or SSCS Interfaces

SSCS

Snapshot volume modification usage for sscs, can be reviewed in the Sun StorEdge 6920 System CLI Quick Reference Guide, Release 3.0. The sscs usage for basic snapshot volume modifications are as follows.

• This CLI will change the favor policy for the volume:
  modify -f <volume/snapshot> volume <volume name>
  EX:
  sscs modify -f snapshot volume snaptest
  Note: The favor policy will change to favor the snapshot

• This CLI will change the snapshot volume name and description:
  modify [-N|--new-name <string>] [-d|--description <string>] volume <string>
  EX:
  sscs modify -N new_volume_name -d "changed description" volume old_volume_name
  Note: This will change the volume name from "old_volume_name" to "new_volume_name". The description of the volume will change to "changed description"

• This CLI will change the snapshot count and snapshot level:
  modify -C 1..32 -L high volume snaptest
  EX:
  sscs modify -C 4 -L high volume snaptest
  Note: The snapshot count will be changed to 4 and the snapshot level will be changed to high. The snapshot count and level options need to be specified when changing either variable.

• This CLI will resnap a volume
  snapshot -R|--resnap volume <snapshot volume>
  EX:
  sscs snapshot -R volume snap_cli
  Note: A resnap of snashot volume "snap_cli" will occur. The data on the snapshot will be updated with the current data of the parent volume. Any data on the snapshot volume will be overwritten

• This CLI will rollback the snapshot:
  snapshot -b|--rollback volume <string>
  EX:
  sscs snapshot -b volume snap_cli
  Note: A rollback of the snapshot volume snap_cli will be started. A rollback will copy the data from the snapshot to the parent volume. Any data on the parrent volume will be overwritten.

• This CLI will cancel a rollback of a snapshot:
  snapshot -c|--cancel-rollback volume <string>
  EX:
  sscs snapshot -c volume snap_cli
  Note: The rollback of the snapshot volume snap_cli will be canceled. Warning: This operation should only be used as a last resort because it causes the parent volume to be lost.

NOTE1: The Storage Domain is assumed to be DEFAULT when it is not specified by the -S switch in the usage

BUI

Snapshot modification for the BUI interface of the 6920 is completed as follows:

Change the volume name, volume description,and resilver priority:

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Snapshots Tab or Snapshots Menu Tree
3. Click on the Snapshot Volume Name that you wish to modify
4. Change the Name and click the Save button, otherwise go to the next step
5. Change the Description and click the Save button

• If you are not changing the snapshot name, or snaphot description, please continue to the next modify option.
• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

Change the favor policy for the volume:

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Volume Tab or Volume Menu Tree
3. Click on the Volume Name that you wish to modify
4. In the "Snapshot Reserve" section click the pulldown menu next to "Volume / Snapshot Policy:" and select the favor to be used
5. Click the Save button

• If you are not changing the favor policy, please continue to the next modify option.
• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

Change the snapshot count and snapshot level:

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Volume Tab or Volume Menu Tree
3. Click on the Volume Name that you wish to modify
4. In the "Snapshot Reserve" section click the pulldown menu next to "Space Allocated For:" and select the snapshot count to be used
5. Click the Save button,otherwise go to the next step
6. Click the pulldown menu next to "Expected Write Activity:", select the new level to be used and click the Save button

• If you are not changing the snapshot count or level, please continue to the next modify option.
• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

Resnap a volume

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Snapshots Tab or Snapshots Menu Tree
3. Click on the Snapshot Name that you wish to modify
4. Click on the Blue Resnap button at the top of the window

• If you are not resnapping a volume, please continue to the next modify option.
• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

Rollback the snapshot:

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Snapshots Tab or Snapshots Menu Tree
3. Click on the Snapshot Name that you wish to modify
4. Click on the Blue Rollback button at the top of the window

• If you are not performing a rollback of a volume, please continue to the next modify option.
• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

Cancel a rollback of a snapshot:

1. Click on the Configuration Services or Common Array Manager(3.2.0.38) Link.
2. Click on the Jobs Tab or Jobs Menu Tree
3. Click on the Current Jobs Tab or Current Jobs Menu Tree
4. Click on the radio button next to the rollback job you will be canceling
5. Click on the Blue Cancel Job button at the top of the window

• If you received a failure notification, continue to Step C.
• If you received a success notification, you have validated that volume modification is complete.

C. Creation Failure.

Please review the following table for a failure message and corresponding action. Please follow the action that describes your symptom.

BUI
Message:
An error occurred. Please contact your system administrator

Action:
Please go to Step D

Message:
The Snapshot name contains invalid characters

Action:
Change the Snapshot name per pop-up directions.

SSCS
Message:
Name contains illegal characters

Action:
Change the snapshot Name. Valid Characters are A-Z, a-z, 0-9, -, or _. No Spaces

Message:
Name too long

Action:
Change the snapshot name. Volume snapahots must be less than 16 characters

Message:
<pool_name>: The object was not found.

Action:
Make sure the pool exists and the name is correct(sscs list pool)

Message:
<domain>: The object was not found.

Action:
Check the spelling of the domain name, and make sure it exists(sscs list sdomain)

Message:
Error: The operation failed.

Action:
Please go to Step D

Message:
Parent Volume: The object was not found

Action:
When performing snapshot commands, use the snapshot volume name. Check the spelling of the volume name, and make sure it exists(sscs list volume)

Message:
''Invalid parameter: ; operation failed'

Action:
Verify the correct volume is being used in the command

Message:
The snapshot reserve size could not be modified.: ; operation failed.

Action:
Check the current settings for the reserve size (sscs list volume <snapshot name>) and verify that the size isn't being decreased in the command

Message:
The snapshot level and count entered would not result in equal or larger snapshot reserve.

Action:
You can't decrease the snapshot count or the snap level. A snap reserve needs to be deleted and rebuilt to decrease the size, check document <Document: 1007160.1>  Validating Snapshot and Snapshot Reserve Deletion for a Sun StorEdge[TM] 6920 for details|

If a message is not listed, or an action above did not work, go to Step G.

D. Data Collection

Please collect the following information:

• Answers to Questions in Step A.
• 6920 Solution Extract, Reference document <Document: 1003756.1>   How to collect an extractor from a Sun StorEdge[TM] 6920 (2.x and 3.x)
• The message given by SSCS or BUI(screen capture if possible)
• The command used, if by SSCS
• The following sscs output:

sscs list sdomain
sscs list volume <snapshot name>
sscs list pool
sscs list vdisk

NOTE 2: Screen captures of the summary page for each object could be used, as well, for BUI related creations.

Once this information is collected, please contact Sun Support.

E. Validate command provided

Validate command provided against examples in the Sun StorEdge 6920 System CLI Quick Reference Guide, Release 3.0.

Ensure that options are valid based on the usage available in reference guide.

F. error occurred

If the customer reports:

An error occurred. Please contact your system administrator

OR

Error: The operation failed.

Validate the services on the Service Processor. Reference document <Document: 1007129.1>  

G. Perform health check of array

Reference document <Document: 1005447.1> : Sun StorEdge[TM] 6920 Health Checklist

H. Escalate

Provide the following:

• Description of what is not being displayed properly


• Results of Step E.


• Results of Step F.


• Results of Step G.


• Location of everything in Step D.

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