From: Russell Coker <russell@coker.com.au>
To: linux-btrfs@vger.kernel.org
Subject: Re: [Question] Btrfs on iSCSI device
Date: Sat, 28 Jun 2014 09:40:02 +1000 [thread overview]
Message-ID: <2173101.6G0fsERxkf@xev> (raw)
In-Reply-To: <53AD9D1A.4050703@libero.it>
On Fri, 27 Jun 2014 18:34:34 Goffredo Baroncelli wrote:
> I don't think that it is possible to mount the _same device_ at the _same
> time_ on two different machines. And this doesn't depend by the filesystem.
If you use a clustered filesystem then you can safely mount it on multiple
machines.
If you use a non-clustered filesystem it can still mount and even appear to
work for a while. It's surprising how many writes you can make to a dual-
mounted filesystem that's not designed for such things before you get a
totally broken filesystem.
On Fri, 27 Jun 2014 13:15:16 Austin S Hemmelgarn wrote:
> The reason it appears to work when using iSCSI and not with directly
> connected parallel SCSI or SAS is that iSCSI doesn't provide low level
> hardware access.
I've tried this with dual-attached FC and had no problems mounting. In what
way is directly connected SCSI different from FC?
--
My Main Blog http://etbe.coker.com.au/
My Documents Blog http://doc.coker.com.au/
next prev parent reply other threads:[~2014-06-27 23:40 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-27 15:44 [Question] Btrfs on iSCSI device Zhe Zhang
2014-06-27 16:34 ` Goffredo Baroncelli
2014-06-27 17:15 ` Austin S Hemmelgarn
2014-06-27 17:52 ` Zhe Zhang
2014-06-27 23:40 ` Russell Coker [this message]
2014-06-28 3:28 ` Austin S Hemmelgarn
2014-06-27 17:54 ` ronnie sahlberg
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