Re: Possible failures in raid5?

[Luca Berra <bluca@comedia.it>]

On Thu, Dec 30, 2004 at 03:40:22AM +0400, Brad Campbell wrote:
>Luca Berra wrote:
>>On Tue, Dec 28, 2004 at 10:35:33PM -0500, Guy wrote:
>>
>>>For testing the disk(s) status, look at smartd.
>>>My disks are too old, but newer disks should support this.
>>
>>except that libata does not support S.M.A.R.T.
>
>There is an experimental patch in the libata-dev tree that appears (and I 
>mean it works for me) to support SMART reliably on a UP kernel. There is a 
>known issue with SMP kernels ATM. I have been using it every 20 minutes on 
>a reasonably loaded server with 13 SATA and 1 ATA disks now for what must 
>be several months with no issues. (It has helped detect a pending disk 
>failure quite nicely)/
>
>I guess it will stay experimental until someone with an SMP machine can 
>assist Andy in debugging the SCSI passthough code (It's not SMART specific 
>at this stage).

thanks for the info, i will check it out (is there a snapshot of the
libata-dev for non bk users? /pub/linux/kernel/people/jgarzik/libata on
kernel.org seems to be a bit behind)
Unfortunately i don't own a SMP machine with sata drives.
L.

-- 
Luca Berra -- bluca@comedia.it
        Communication Media & Services S.r.l.
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