> -----Original Message----- > From: Eric Sandeen [mailto:esandeen@xxxxxxxxxx] > Sent: Friday, January 9, 2015 14:05 PM > To: Dexuan Cui > Cc: Al Viro; linux-fsdevel@xxxxxxxxxxxxxxx; linux-ext4; stefanha@xxxxxxxxxx > Subject: Re: Can one file system be R/W mounted multiple times in Linux? > > On Jan 8, 2015, at 10:59 PM, Dexuan Cui <decui@xxxxxxxxxxxxx> wrote: > > >> -----Original Message----- > >> From: Al Viro [mailto:viro@xxxxxxxxxxxxxxxx] On Behalf Of Al Viro > >> Sent: Friday, January 9, 2015 11:51 AM > >> To: Dexuan Cui > >> Cc: linux-fsdevel@xxxxxxxxxxxxxxx; 'linux-ext4'; stefanha@xxxxxxxxxx > >> 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 > > But to be clear, just in case - this is completely different from, say, mounting the > same ext4 fs on two different nodes on a SAN, which is quite certainly not safe... > > -Eric Thank Eric for pointing this out! Can you please explain this? I didn't use SAN... Thanks, -- Dexuan -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
