HPE EVA Storage

Reallocating Disk from one Virtual Disk Group to another

 
CameronY
Frequent Advisor

Reallocating Disk from one Virtual Disk Group to another

Hello Community,

 

The table below is reflective of one of four shelves that we have in our EVA.

 

Disk Enclosure #4

 

I'd like to move/reallocate disks from bay 6 (& 7 if possible) across all shelves from the VDG "Backup" to the "Production" VDG.

 

My concern is the sizing of the disks, firmware and number of disks used.

 

The "Backup" VDG allocation is approximately ...

Capacity Total:   6,517.98 GB
Occupancy Total:  4,064.17 GB
Available Total:  2,453.81 GB

 

The "Production" VDG allocation is approximately ...

Capacity Total:   3,826.48 GB
Occupancy Total:  3,202.04 GB
Available Total:    624.44 GB

 

Is such a desired move possible ?

 

Any suggestions/advise regarding the reallocation of drives from one VDG to another appreciated.

 

*Am a bit new to all of this.

 

Cheers,

Cameron

 

 

 

P.S. This thread has been moevd from General to Storage Area Networks (SAN) (Enterprise). - Hp Forum Moderator

2 REPLIES 2
Johan Guldmyr
Honored Contributor

Re: Reallocating Disk from one Virtual Disk Group to another

ftp://ftp.compaq.com/pub/products/storageworks/whitepapers/5982-9140EN.pdf

 

Fibre Attached Technology Adapted (FATA) disks are lower cost, lower performance disks for use in the EVA.
Because of the design of these disks, HP recommends a reduced duty cycle to meet typical business-critical
availability requirements. These characteristic lend themselves for use in applications where random access
performance and continuous operation are not required.
The EVA requires that FATA disks be organized in a separate Disk Group.
The best application match for FATA disks is to assist online backup and recovery processes

 

So based on that - do you really want to add these types of disks into your Production DG? It also hints that it's not possible to mix 10K and FATA drives - Is that still the case though?

 

You'll get spotty/unpredictable performance  and if you have single disk protection enabled and add the 500GB disks, you'll have 2x500GB reserved space (compared to 2x146GB with only 146GB disks).

giladzzz
Honored Contributor

Re: Reallocating Disk from one Virtual Disk Group to another

Hi

The EVA will not let you as you can not mix FATA (near online) and fiber disks in the same disk group

what you can do if your firmware level is above 10000000 is to move virtual disks from one disk group to another this can now be done online. If your firmware level is below 10000000 this can be done but you will have to shutdown the server

unpresent the disks and do a snapclone with present and power on the server.

Regards