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May 17th, 2010 03:00
AX4-5F, SRM and consistent snapshots
Hi,
We're trying to setup SRM with the EMC Mirrorview SRA on a EMC AX4-5F.
We installed all the licenses and replication is up and running.
But when do a test run, SRM is trying to make a consistent snap which is failing:
with result: Failed (Navisphere CLI command: ' snapview -startsession XXXX_VMWARE_SRM_SESSION -snapshotid XX -consistent '
When we try to make the snapshot by hand, same error:
bash-3.2$ ./NaviSECCli.exe -User admin -Password xx -Scope 0 -h xx snapview -startsession xx_VMWARE_SRM_SESSION -snapshotid xx -consistent
Error: snapview command failed
Only persistent sessions are allowed on this storage system. The following switch must be specified: -persistence
When we start the session in persistent mode, session can be created:
bash-3.2$ ./NaviSECCli.exe -User admin -Password xx -Scope 0 -h xx snapview -startsession xx_VMWARE_SRM_SESSION -snapshotid xx -persistence
You must activate a snapshot on this session before you can access it.
According to the manual:
Note For AX4-5 series, persistent mode is always enabled and consistent mode is supported only if you have the SnapView enabler installed. For AX series storage systems, persistent mode is always enabled and consistent mode is not supported.
Is there a way to enable SRM to maken persistent snap in stead of consistent snaps.
Regards,
John Grinwis
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GearoidG
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May 17th, 2010 04:00
Just a shot in the dark at the moment
Does you ax4-5 have the Navisphere Manager enabler and expansion pack enabler installed?
>>bash-3.2$ ./NaviSECCli.exe -User admin -Password xx -Scope 0 -h xx snapview -startsession xx_VMWARE_SRM_SESSION -snapshotid xx -consistent
Error: snapview command failed
Only persistent sessions are allowed on this storage system. The following switch must be specified: -persistence
Would indicate you are missing software, maybe?
From the SRM Matrix:
AX4-5 with the Navisphere Manager enabler and expansion pack enabler installed
Regards
Gearoid
jgrinwis
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May 17th, 2010 04:00
I think that's the case as I am also missing clones, can only make snapshots.
jgrinwis
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May 17th, 2010 04:00
Shouldn't the software package be -SnapView in stead of -SnapshotManagement
GearoidG
251 Posts
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May 17th, 2010 04:00
Ill have to double check how the enabler is displayed on an AX4-5. If I find out I will let you know
Regards
Gearoid
GearoidG
251 Posts
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May 17th, 2010 04:00
That looks correct
I would consider getting a case opened with support.
Just one other query
>>>
Note For AX4-5 series, persistent mode is always enabled and consistent mode is supported only if you have the SnapView enabler installed. For AX series storage systems, persistent mode is always enabled and consistent mode is not supported.
>>
As you can see on an AX4-5 you can have both modes once you have the snapview enabler & Navisphere Manager enabler (which you have)
Regards
Gearoid
jgrinwis
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May 17th, 2010 04:00
I had a look and consistent sessions should be supported with Navisphere Manager which we have running:
bash-3.2$ ./NaviSECCli.exe -User admin -Password xx -Scope 0 -h xx ndu -list | grep Name
Name of the software package: -MirrorView
Name of the software package: -SnapshotManagement
Name of the software package: -NavisphereExpress
Name of the software package: -SharedStorageControl
Name of the software package: FLARE-Operating-Environment
Name of the software package: -DualSP
Name of the software package: -ExpansionTier
Name of the software package: -NavisphereManager
jgrinwis
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May 17th, 2010 04:00
Just had an online chat with EMC support, according to them we should also buy the snapview enabler to get support for consistent snaps.
jgrinwis
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May 21st, 2010 02:00
After installing SnapViewOption-01.23.5.001.ena, the AX4-5 snapview enabler:
bash-3.2$ ./NaviSECCli.exe -User admin -Password xxx -Scope 0 -h xxx ndu -list | grep -i name | grep Snap
Name of the software package: -SnapView
Name of the software package: -SnapshotManagement
After starting a test plan. a consistent session created.
bash-3.2$ ./NaviSECCli.exe -User admin -Password xx -Scope 0 -h xx -snapview -listsessions -all
Name of the session: xx_VM_WARE_SRM_SESSION
Number of read requests serviced by the snapview cache pool: 417
Total number of read requests on the snapview logical unit: 2012
Number of reads from the TLU: 1595
Number of writes requests in the session: 22
Number of writes requests to cache that triggered a COW: 2
Total number of writes requests on the snapview target logical unit: 20
Number of writes requests larger than the chunk size: 0
SP A Cache Capacity in GB: 120
Session Usage for This SP: 0.000102
List of Target Logical Units: ORA-PRD_MIRROR
snap Logical Units UID xx
snap Logical Units Name ORA-PRD_MIRROR_VMWARE_SRM_SNAP
Session in simulation: Not supported in this revision.
Session in persistence: YES
Session creation time: 05/21/10 10:48:10
Session state: Normal
List of Target LUN Number: 200
Session Consistent Start: YES