From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexander Zarochentsev <zam@namesys.com>
Subject: Re: RAID-1 and Reiser4 issue: umount hangs
Date: Wed, 31 May 2006 11:13:47 +0400
Message-ID: <200605311113.48131.zam@namesys.com>
References: <447B56C1.80608@inn.nl> <200605301553.34815.zam@namesys.com> <447C9AFA.90400@inn.nl>
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To: reiserfs-list@namesys.com
Cc: Arend Freije <afreije@inn.nl>

On Tuesday 30 May 2006 23:20, Arend Freije wrote:
> Alexander Zarochentsev wrote:
> > Hello,
> >
> > On Tuesday 30 May 2006 00:17, Arend Freije wrote:
> >> Hi,
> >>
> >> I'm using Reiser4 for my filesystems on disk (/dev/sda) , and it
> >> works just fine. Recently I bought a second disk (/dev/sdb) for
> >> RAID-1 mirroring. With mdadm I created a degraded raid-1 array  on
> >> /dev/md/0, devices missing,/dev/sdb1. After that I created a
> >> Reiser4 filesystem on /dev/md/0 and mounted it at /mnt. Then I
> >> copied the data from /dev/sda1 to /mnt.
> >
> > would it work better with "no_write_barrier" mount option?
>
> It would indeed. What's the purpose of this option?

It disables write barrier support in reiser4 which may be buggy.  It is 
not necessary that reiser4 code has a bug, but the elevator, md device 
or disk driver code.

> Kind Regards,
>
> Arend
>
>
> !DSPAM:447c9c9d95615939618124!

-- 
Alex.