linux-ext4 - RE: Can one file system be R/W mounted multiple times in Linux?

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Message-ID: <F792CF86EFE20D4AB8064279AFBA51C61EA727DE@SIXPRD3002MB028.064d.mgd.msft.net>
Date:	Fri, 9 Jan 2015 04:58:47 +0000
From:	Dexuan Cui <decui@...rosoft.com>
To:	Al Viro <viro@...IV.linux.org.uk>
CC:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	'linux-ext4' <linux-ext4@...r.kernel.org>,
	"stefanha@...hat.com" <stefanha@...hat.com>
Subject: RE: Can one file system be R/W mounted multiple times in Linux?

> -----Original Message-----
> From: Al Viro [mailto:viro@....linux.org.uk] On Behalf Of Al Viro
> Sent: Friday, January 9, 2015 11:51 AM
> To: Dexuan Cui
> Cc: linux-fsdevel@...r.kernel.org; 'linux-ext4'; stefanha@...hat.com
> Subject: Re: Can one file system be R/W mounted multiple times in Linux?
> 
> On Fri, Jan 09, 2015 at 03:44:16AM +0000, Dexuan Cui wrote:
> > The 'mount' utility allows me to mount 1 file systems multiple times at
> different
> > mount points, like "mount /dev/sdb1 /a; mount /dev/sdb1 /b".
> >
> > I tried to write from /a and /b at the same time and it seems everything is OK
> > and no data corruption happens.
> > I tried only  ext4 only.
> >
> > Can somebody please tell me if this usage is safe?
> 
> Yes.

Thanks for the confirmation!

-- Dexuan
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