Re: mount -o loop problem

[Florin Andrei <florin@sgi.com>]

Forgot to tell you, the partition was clean and unmounted when i run dd
on it on Irix.

On Wed, 2003-01-15 at 13:10, Florin Andrei wrote:
> I took a copy of an XFS partition from an Irix system, using dd:
> 
> dd if=/dev/dsk/dks1d1s0 of=somesystem.img bs=1024k
> 
> Then i put the image on a Linux system running an XFS-enabled kernel and
> i tried to mount it via loopback. I started with this command:
> 
> mount -t xfs -o loop,ro,noatime,nodev,nofsck somesystem.img image/
> 
> ...which of course didn't worked. After dropping a few parameters, i
> ended up trying this:
> 
> mount -o loop,noatime,nodev somesystem.img image/
> 
> At this moment i got this error on the command line:
> 
> [root@stantz somesystem]# mount -o loop,noatime,nodev somesystem.img
> image/
> mount: wrong fs type, bad option, bad superblock on /dev/loop0,
>        or too many mounted file systems
> [root@stantz somesystem]#
> 
> ...and this error in syslog:
> 
> Jan 15 13:00:34 stantz kernel: XFS: dirty log written in incompatible
> format - can't recoverXFS: log mount/recovery failedXFS: log mount
> failedXFS mounting filesystem
> loop(7,0)
> Jan 15 13:00:34 stantz kernel: XFS: nil uuid in log - IRIX style
> logStarting XFS recovery on filesystem: loop(7,0) (dev: 7/0)
> 
> I'm not exactly happy with not using "-o ro" and not being able to use
> "nofsck" because i need to disturb as little as possible on this image
> (a low-level analysis must be performed on it). But anyhow, at this
> moment i'd be content to mount it in any way that works (i can create
> another copy if i have to).
> 
> So, what's wrong? How can i mount the image via loopback, while at the
> same time preserving its state exactly as it is (within reason, i'd like
> to do as little writes as possible when mounting it for the first time)?
> 
> The reason i need to loopback-mount it on Linux is that i have to run an
> analysis tool on it, and i couldn't compile the tool on Irix yet; i may
> be able to do that in the future but, for the short term, loopback seems
> like a quicker solution.
> 
> -- 
> Florin Andrei
> 
> "The Indians of the American Southwest called him Coyote, those of the
> Pacific Coast called him Raven. Europeans called him Reynard the Fox.
> African-Americans called him Br'er Rabbit. In 20-century literature he
> appears first as Bugs Bunny and then as the Hacker." - Neal Stephenson
> 
> 
-- 
Florin Andrei

"The Indians of the American Southwest called him Coyote, those of the
Pacific Coast called him Raven. Europeans called him Reynard the Fox.
African-Americans called him Br'er Rabbit. In 20-century literature he
appears first as Bugs Bunny and then as the Hacker." - Neal Stephenson