Date: Tue, 6 Nov 2007 13:05:06 -0800 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: Artem Kuchin <matrix@itlegion.ru> Cc: Steve Bertrand <iaccounts@ibctech.ca>, freebsd-stable@freebsd.org Subject: Re: How to verify a mirror raid using atacontrol? Message-ID: <20071106210506.GA1704@eos.sc1.parodius.com> In-Reply-To: <04d201c820b7$ea1f1a30$0c00a8c0@Artem> References: <048101c820b0$a4507b90$0c00a8c0@Artem> <4730D080.6050502@ibctech.ca> <04d201c820b7$ea1f1a30$0c00a8c0@Artem>
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On Tue, Nov 06, 2007 at 11:59:21PM +0300, Artem Kuchin wrote:
> Steve Bertrand wrote:
>> Artem Kuchin wrote:
>>> I have a mirror raid on Promise controller
>>> supported by atacontrol.
>>> How can i verify it?
>> [snip]
>
> No, no. i meant completelly verify raid data, that is
> that bother drive match and no bad blocks on any of them.
> There is a special VERIFY raid command on 3ware and
> HPT and other, but i don't see it on atacontrol.
The feature you want is called "scrubbing" or "disk scrubbing".
The best options you have that I know of are using dd to scan the entire
disk, or a program that comes with the base system (but
compiled/installed through the ports system) called diskcheckd (which
more or less does what you want, but it does not appear to work
exactly as described; I have an open PR on it: ports/115853)
Otherwise, ZFS offers exactly what you want. Case in point:
icarus# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
storage 928G 97.3G 831G 10% ONLINE -
icarus# zpool scrub storage
icarus# zpool status
pool: storage
state: ONLINE
scrub: scrub in progress, 0.16% done, 0h20m to go
config:
NAME STATE READ WRITE CKSUM
storage ONLINE 0 0 0
ad4 ONLINE 0 0 0
ad6 ONLINE 0 0 0
errors: No known data errors
icarus# zpool status | egrep 'scrub|errors'
scrub: scrub in progress, 7.21% done, 0h12m to go
errors: No known data errors
--
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |
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