topic Raid1+0 over 3 MSDA's in MSA Storage

Raid1+0 over 3 MSDA's

City_Blue — Thu, 04 Oct 2007 03:20:04 GMT

question

if you have 1x msa1000 with 2 x msa30 attached via scsi. then configure one large volume to span all 3 shelf's. you then carve up this volume in to diffrent sized partitions.

what would happen if you lost one of the Msa 30's? would you lose all the presented partions or would they still be avalible to the windows server?

cheers

SD

Re: Raid1+0 over 3 MSDA's

Uwe Zessin — Thu, 04 Oct 2007 06:08:12 GMT

Theoretically, the MSA firmware puts mirrored chunks onto different disk drives in different SCSI busses, so you should be safe - at least that is what a HP employee wrote quite some time ago here on ITRC.

Re: Raid1+0 over 3 MSDA's

City_Blue — Thu, 04 Oct 2007 06:10:31 GMT

Uwe

but has anyone ever tested this out? for real :-)

cheers

Re: Raid1+0 over 3 MSDA's

Uwe Zessin — Thu, 04 Oct 2007 06:18:57 GMT

I have not heard from anybody.
Go ahead - don't be shy ;-)

Re: Raid1+0 over 3 MSDA's

City_Blue — Thu, 04 Oct 2007 06:52:58 GMT

almost put one into production but didn't have time to test it so bottled it :-)