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Extending Mirrored Concatenated volume in VEA

We have a Windows Server 2008 R2 Enterprise cluster and disk management is done thru Veritas Enterprise Administrator  (VSF Versio: 5.1 SP2 Build 5.1.20000.87).

We want to extend Mirrored Concatenated volume and already added two disks from different enclosures, imported to the disk group.

As for now disks in one mirror are all from one storage (enclosure) and disks in the other mirror are all from another storage (enclosure).

The goal is: to add new disks to the mirrors in the way that disk from enclosure A goes to mirror A and disk from enclosure B goes to mirror B.

Will the checkbox Mirror across Enclosure put the disks to the right mirrors?

Enclosure.JPG

 

UPD: After adding disks from different storage, adding to test group, mirroring accross enclosures did work. Worked on a non-test disk group as well.

 

 

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Hi Volodymyr, That option

Hi Volodymyr,

That option should allow you to extend the mirror and keep each plex (mirror copy) separated by Enclosure.  This option will depend on the specific arrays being used.  The basic rule of thumb would be if the 2 arrays currently show up as different array enclosures under the Enclosure icon in VEA.  If VEA does not show them as separate enclosures there, then the option will not be able to identfy the enclosures correctly to keep the plexes in the correct enclosure.

However, this is just a rule of thumb and SFW may still have problems with the expand volume with some arrays.  It is always best to test with a smaller test volume first if you are concerned.

I would recommend checking that the volume was grown correctly after the process is completed.  If by chance SFW does the expand wrong, the subdisks can be manually moved with a temp lun of similar size. 

Thank you,

Wally

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Accepted Solution!

Hi Volodymyr, That option

Hi Volodymyr,

That option should allow you to extend the mirror and keep each plex (mirror copy) separated by Enclosure.  This option will depend on the specific arrays being used.  The basic rule of thumb would be if the 2 arrays currently show up as different array enclosures under the Enclosure icon in VEA.  If VEA does not show them as separate enclosures there, then the option will not be able to identfy the enclosures correctly to keep the plexes in the correct enclosure.

However, this is just a rule of thumb and SFW may still have problems with the expand volume with some arrays.  It is always best to test with a smaller test volume first if you are concerned.

I would recommend checking that the volume was grown correctly after the process is completed.  If by chance SFW does the expand wrong, the subdisks can be manually moved with a temp lun of similar size. 

Thank you,

Wally

View solution in original post

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Hello Wally and thx! yes, 2

Hello Wally and thx!

yes, 2 arrays currently show up as different array enclosures under the Enclosure icon in VEA and we guess if we user the mirror across check-box then this should work, but that's too risky taking into account the size of the volume - 4TB.

We're also considering performing the test with smaller disks and checking whether this would work as expected or not and then performing the same on prod cluster.

I've been also thinking of performing the very same operation, mirroring across enclosures, but thru the CLI and specifying which disk to which plex should go.