[Beowulf] Re: Large raid rebuild times

Robert Sandilands rsandilands at authentium.com
Thu Nov 19 15:29:12 EST 2009


I am currently rebuilding a 28 x 1 TB RAID 5 volume that is based on the 
SurfRAID TRITON 16S3 with a JBOD unit. It is 16.6% complete after 2 1/2 
hours.

I am rebuilding before copying the data and returning all the Seagate 1 
TB drives. Replacing it with Hitachi 2 TB drives and RAID 6.

The combination of a large number of drives in RAID 5 and/or Seagate 1 
TB drives is not to be recommended.

Robert

beowulf-request at beowulf.org wrote:
>
> Hello,
>
> Has anyone here seen any numbers, or tested themselves, the rebuild
> times for large raid arrays (raid 6 specifically)?
> I can't seem to find anything concrete to go by, and I haven't had to
> rebuild anything larger than a few TB. What happens when you loose a
> 2TB drive in a 20TB array for instance? Do any hardware raid solutions
> help. I don't think ZFS is an option right now, so I'm looking at
> Linux and/or hardware raid.
>
>
>   

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