From: hpa@zytor.com (H. Peter Anvin)
To: linux-raid@vger.kernel.org
Subject: Re: Call for RAID-6 users
Date: Thu, 5 Aug 2004 23:46:14 +0000 (UTC) [thread overview]
Message-ID: <ceugs6$rb3$1@terminus.zytor.com> (raw)
In-Reply-To: 200407302311.04942.maarten@ultratux.net
Followup to: <200407302311.04942.maarten@ultratux.net>
By author: maarten van den Berg <maarten@ultratux.net>
In newsgroup: linux.dev.raid
>
> I'm still early in the testing phase, so nothing to report as yet.
> But I have a question: I tried to reproduce a reported issue when creating a
> degraded raid6 array. But when I created a raid6 array with one disk
> missing, /proc/mdstat reported no resync going on. Am I not correct in
> assuming that raid6 with 1 missing drive should at least start resyncing the
> other drive(s) ? It would only be really degraded with two missing drives...
>
This is correct; when an array is first created it needs resync, and
with less than two drives missing this should happen.
> So instead, I defined a full raid6 array which it is now resyncing...
> My resync speed is rather slow (6000K/sec). I'll have to compare it to
> resyncing a raid5 array though before concluding anything from that. Cause
> this system is somewhat CPU challenged indeed: a lowly celeron 500.
The RAID-6 computations on that system will be quite slow indeed. At
least you have MMX.
-hpa
prev parent reply other threads:[~2004-08-05 23:46 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-23 23:32 Call for RAID-6 users H. Peter Anvin
2004-07-26 21:38 ` Jim Paris
2004-07-27 2:05 ` Matthew - RAID
2004-07-27 2:12 ` Jim Paris
2004-07-27 16:40 ` Ricky Beam
2004-07-27 17:20 ` Jim Paris
2004-07-27 18:19 ` Jim Paris
2004-07-27 18:48 ` Jim Paris
2004-07-28 3:09 ` Jim Paris
2004-07-28 8:36 ` David Greaves
2004-07-28 10:02 ` Jim Paris
2004-07-30 15:58 ` H. Peter Anvin
2004-07-30 19:39 ` Jim Paris
2004-07-30 19:45 ` H. Peter Anvin
2004-07-30 21:11 ` maarten van den Berg
2004-07-30 21:38 ` maarten van den Berg
2004-07-31 0:28 ` maarten van den Berg
2004-08-01 13:03 ` Kernel panic, FS corruption Was: " maarten van den Berg
2004-08-01 18:05 ` Jim Paris
2004-08-01 22:10 ` maarten van den Berg
2004-08-05 23:54 ` H. Peter Anvin
2004-08-06 0:19 ` Jim Paris
2004-08-06 0:36 ` H. Peter Anvin
2004-08-06 4:04 ` Jim Paris
2004-08-05 23:51 ` H. Peter Anvin
2004-08-05 23:46 ` H. Peter Anvin [this message]
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