topic Re: EVA vdisk with VRAID5 type in Disk Enclosures

EVA vdisk with VRAID5 type

Pearl Park — Fri, 26 Jan 2007 16:19:55 GMT

This is about HP EVA 5000.
A disk group has 10 disks.
A virtual disk with size=2GB and VRAID5 type is created from the disk group.
This virtual disk has columns=10. Correct?
How about parity? Is parity column=1 or 10?

Thanks.

Re: EVA vdisk with VRAID5 type

Peter Mattei — Sat, 27 Jan 2007 12:53:57 GMT

I am not sure what you actually want to find out and what you mean by column
!
I assume you either want to know about maintaining redundancy or striping with a small Vdisk of 2GB.

Vdisks are built with Rstores of 2MB.
Rstores are built with Psegs.
For Vraid5 5 Psegs form an Rstore (4 data 1 parity pseg)

So redundancy and striping is perfectly maintained even with vdisks of just 2GB.

Does this answer your question?

Cheers
Peter

Re: EVA vdisk with VRAID5 type

John McNulty_2 — Fri, 29 May 2009 07:50:49 GMT

It may or may not have answered Pearl's question, but it certainly answered mine.

Thanks Peter.

Re: EVA vdisk with VRAID5 type

Patrick Terlisten — Fri, 29 May 2009 08:01:48 GMT

Hello Peter,

isn't it the other way round? 2 MB for each PSEG and 4+1 PSEG for a RAID 5 RSTORE (10 MB)?

Best regards,
Patrick