From: Michael Tokarev <mjt@tls.msk.ru>
To: mingz@ele.uri.edu
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: raid0 fail to detect drive failure
Date: Wed, 02 Nov 2005 12:08:58 +0300 [thread overview]
Message-ID: <4368822A.4050400@tls.msk.ru> (raw)
In-Reply-To: <1130860974.9447.19.camel@localhost.localdomain>
Ming Zhang wrote:
> Hi folks
>
> I have a raid0 on top of 2 sata disk sda and sdb. after i hot unplug
> sda, the raid0 still shows online and active. run dd to write to it will
> fail and dmesg shows scsi io error. but /proc/mdstat shows everything is
> ok.
Since raid0 isn't relly raid (as Redundrand) and can't really do
anything with IO errors on component devices, this behaviour
(returning IO errors to the application) is the only sane way
to go. It should not fail just like when your disk drive has
a bad sector on it, the whole partition (or whole disk) with
that bad sector isn't "marked as failed". So what you see is
exactly correct behaviour, in my opinion anyway.
/mjt
next prev parent reply other threads:[~2005-11-02 9:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-01 16:02 raid0 fail to detect drive failure Ming Zhang
2005-11-02 9:08 ` Michael Tokarev [this message]
2005-11-02 13:40 ` Ming Zhang
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