On 24 Feb 2012, at 15:43, Richard Ems wrote:
> On 02/24/2012 03:08 PM, Emmanuel Florac wrote:
>> Le Fri, 24 Feb 2012 13:52:40 +0100
>> Richard Ems <richard.ems@xxxxxxxxxxxxxxxxx> écrivait:
>>> Hi list,
>>> We are getting now 32 x 3 TB Hitachi SATA HDDs.
>>> I plan to configure them in a single RAID 6 set with one or two
>>> hot-standby discs. The raw storage space will then be 28 x 3 TB = 84
>>> TB. On this one RAID set I will create only one volume.
>>> Any thoughts on this?
>> If you'd rather go for more safety you could build 2 16 drives RAID-6
>> arrays instead. I'd be somewhat reluctant to make a 30 drives array
>> --though current drives are quite safe apparently.
> Thanks, yes, this sounds good, but it's a matter of administration
> simplicity doing the backups why I chose to have only one
> volume/partition/XFS. At some point one of both drives will become near
> to full and moving dirs from one partition to the other won't be that
> easy with out backup system ...
You might consider making a software raid0 from the two raid-6 arrays.