topic Smart Array RAID level migration in ProLiant Servers (ML,DL,SL)

Smart Array RAID level migration

Andrey Gradilenko — Wed, 26 Oct 2011 11:01:12 GMT

Hello !

I have Smart Array Controller P410 with four sas HDDs in RAID5 and one LUN maximum size on it. If I expand RAID5 array group up to 8 HDDs without creation additional LUNs - P410 can support mirgation exiting RAID5 level to RAID50 level ?

Re: Smart Array RAID level migration

Matti_Kurkela — Wed, 26 Oct 2011 12:48:27 GMT

Expanding a 4-disk RAID5 set to 8 disks does not make it a RAID50; it will just be a bigger RAID5 set.

P410 should support expansion, but may require that you have a write cache module installed: either a BBWC (Battery Backed Write Cache) or a newer FBWC (Flash Backed Write Cache).

The write cache module also increases the performance of the controller, so in my opinion it's kind of silly to buy systems without it. But sometimes someone wants to buy "the cheapest model possible"...

Re: Smart Array RAID level migration

Andrey Gradilenko — Wed, 26 Oct 2011 13:11:09 GMT

My controller with BBWC module. Support migration exactly RAID5 to RAID50 ?

Re: Smart Array RAID level migration

SFHR — Thu, 27 Oct 2011 11:45:45 GMT

Hi Andrey,

Yes you can. Please use ACU for migration. Refer to:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00294139/c00294139.pdf

Please go topage 25 and follow the guidelines.

Hope this will be helpful.

Please share the success :)

Regards