topic EVA leveling in Disk Enclosures

EVA leveling

Francis Flan — Mon, 29 Mar 2010 15:12:26 GMT

Hi,

I need to add 10 disks to my EVA.
What is the best way to do this in terms of leveling - add one at a time or all together?

thanks

Re: EVA leveling

Marcus Schack — Mon, 29 Mar 2010 15:19:26 GMT

You can add all at once.

When you originally insert the new drives, do them one at a time, waiting 30 seconds between drive insertions into the shelf. Then when the new drives show up in UNGROUPED, update their firmware. Then GROUP them all at once.

Re: EVA leveling

Francis Flan — Mon, 29 Mar 2010 15:19:35 GMT

Best practice to optimize availability when adding disks to an array:
• Set add disk setting to Manual.
• Add disks one at a time, following the “wait 60 seconds” rule between disks.
• Distribute disks vertically and evenly as possible to all the shelves.
• Unless otherwise indicated, add new disks to existing Disk Groups. Use the HP StorageWorks Command View add multiple disks command (see command line interface [CLI] commands).
• Add disks in groups of eight.
• For growing existing applications, if the operating system supports Vdisk growth, increase Vdisk size. Otherwise, use a software volume manager to add new Vdisks to applications.

Best practice to add capacity: Avoid replacing existing disks with larger capacity disks. Either retain the old disks in the system or create a new Disk Group and migrate the existing data.