* Error while testing (using loop device)
[not found] ` <AANLkTikwTRGooDQD+Uo08MkywS+KJ8BXxqqytxbNFiqr-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2010-07-22 19:26 ` Rodrigo E. De León Plicet
[not found] ` <AANLkTin0qMJvDgs705a9Nu0hWNLCdGEXWn7q_2sXQ6yZ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: Rodrigo E. De León Plicet @ 2010-07-22 19:26 UTC (permalink / raw)
To: NILFS Mailing List
Hi.
Ubuntu 10.04
nilfs-tools 2.0.15
--------------------------------------------------------------------------------
rdl@linage:/tmp$ mkdir t
rdl@linage:/tmp$ mkdir t2
rdl@linage:/tmp$ chmod 777 t t2
rdl@linage:/tmp$ dd if=/dev/zero of=test.img bs=1M seek=1000 count=1
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.00422859 s, 248 MB/s
rdl@linage:/tmp$ mkfs -t nilfs2 test.img
mkfs.nilfs2 ver 2.0
Start writing file system initial data to the device
Blocksize:4096 Device:test.img Device Size:1049624576
File system initialization succeeded !!
rdl@linage:/tmp$ sudo mount -t nilfs2 -o loop /tmp/test.img /tmp/t
mount.nilfs2: WARNING! - The NILFS on-disk format may change at any time.
mount.nilfs2: WARNING! - Do not place critical data on a NILFS filesystem.
(... time passes ...)
rdl@linage:/tmp$ lscp
CNO DATE TIME MODE FLG NBLKINC ICNT
1 2010-07-21 15:25:07 cp - 11 3
2 2010-07-21 15:26:47 cp - 118 4
3 2010-07-21 15:26:56 cp - 224 6
4 2010-07-21 15:27:03 cp - 23 12
5 2010-07-21 15:27:14 cp - 48 13
rdl@linage:/tmp$ sudo chcp ss 3
rdl@linage:/tmp$ lscp
CNO DATE TIME MODE FLG NBLKINC ICNT
1 2010-07-21 15:25:07 cp - 11 3
2 2010-07-21 15:26:47 cp - 118 4
3 2010-07-21 15:26:56 ss - 224 6
4 2010-07-21 15:27:03 cp - 23 12
5 2010-07-21 15:27:14 cp - 48 13
6 2010-07-21 15:27:33 cp - 14 14
rdl@linage:/tmp$ sudo mount -t nilfs2 -o ro,cp=2,loop /tmp/test.img /tmp/t2
mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
rdl@linage:/tmp$ sudo mount -t nilfs2 -r -o cp=2,loop /tmp/test.img /tmp/t2
mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
--------------------------------------------------------------------------------
Am I missing something?
Regards.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Error while testing (using loop device)
[not found] ` <AANLkTin0qMJvDgs705a9Nu0hWNLCdGEXWn7q_2sXQ6yZ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2010-07-23 2:31 ` Ryusuke Konishi
[not found] ` <20100723.113125.163336402.ryusuke-sG5X7nlA6pw@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: Ryusuke Konishi @ 2010-07-23 2:31 UTC (permalink / raw)
To: rdeleonp-Re5JQEeQqe8AvxtiuMwx3w; +Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA
Hi,
On Thu, 22 Jul 2010 14:26:38 -0500, Rodrigo_E._De_León_Plicet wrote:
> Hi.
>
> Ubuntu 10.04
> nilfs-tools 2.0.15
>
> --------------------------------------------------------------------------------
>
> rdl@linage:/tmp$ mkdir t
>
> rdl@linage:/tmp$ mkdir t2
>
> rdl@linage:/tmp$ chmod 777 t t2
>
> rdl@linage:/tmp$ dd if=/dev/zero of=test.img bs=1M seek=1000 count=1
> 1+0 records in
> 1+0 records out
> 1048576 bytes (1.0 MB) copied, 0.00422859 s, 248 MB/s
>
> rdl@linage:/tmp$ mkfs -t nilfs2 test.img
> mkfs.nilfs2 ver 2.0
> Start writing file system initial data to the device
> Blocksize:4096 Device:test.img Device Size:1049624576
> File system initialization succeeded !!
>
> rdl@linage:/tmp$ sudo mount -t nilfs2 -o loop /tmp/test.img /tmp/t
> mount.nilfs2: WARNING! - The NILFS on-disk format may change at any time.
> mount.nilfs2: WARNING! - Do not place critical data on a NILFS filesystem.
>
> (... time passes ...)
>
> rdl@linage:/tmp$ lscp
> CNO DATE TIME MODE FLG NBLKINC ICNT
> 1 2010-07-21 15:25:07 cp - 11 3
> 2 2010-07-21 15:26:47 cp - 118 4
> 3 2010-07-21 15:26:56 cp - 224 6
> 4 2010-07-21 15:27:03 cp - 23 12
> 5 2010-07-21 15:27:14 cp - 48 13
>
> rdl@linage:/tmp$ sudo chcp ss 3
>
> rdl@linage:/tmp$ lscp
> CNO DATE TIME MODE FLG NBLKINC ICNT
> 1 2010-07-21 15:25:07 cp - 11 3
> 2 2010-07-21 15:26:47 cp - 118 4
> 3 2010-07-21 15:26:56 ss - 224 6
> 4 2010-07-21 15:27:03 cp - 23 12
> 5 2010-07-21 15:27:14 cp - 48 13
> 6 2010-07-21 15:27:33 cp - 14 14
>
> rdl@linage:/tmp$ sudo mount -t nilfs2 -o ro,cp=2,loop /tmp/test.img /tmp/t2
> mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
>
> rdl@linage:/tmp$ sudo mount -t nilfs2 -r -o cp=2,loop /tmp/test.img /tmp/t2
> mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
How about this?
$ sudo mount -t nilfs2 -o ro,cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
or
$ sudo mount -t nilfs2 -r -o cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
...
$ sudo umount /tmp/t2
Note that you have to manually detach the device like "losetup -d
/dev/loop0" if you once failed to mount it. This is because the loop
device is handled by the common "mount" program not by "mount.nilfs2".
Regards,
Ryusuke Konishi
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Error while testing (using loop device)
[not found] ` <20100723.113125.163336402.ryusuke-sG5X7nlA6pw@public.gmane.org>
@ 2010-07-23 15:47 ` Rodrigo E. De León Plicet
[not found] ` <AANLkTikY4joAzVe-3BSpX9KNSmFPr8cXqpJ_0pJ+rX0P-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: Rodrigo E. De León Plicet @ 2010-07-23 15:47 UTC (permalink / raw)
To: Ryusuke Konishi; +Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA
On Thu, Jul 22, 2010 at 9:31 PM, Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org> wrote:
> How about this?
>
> $ sudo mount -t nilfs2 -o ro,cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
>
> or
>
> $ sudo mount -t nilfs2 -r -o cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
> ...
> $ sudo umount /tmp/t2
Hi. Thanks for the reply.
rdl@linage:/tmp$ lscp
CNO DATE TIME MODE FLG NBLKINC ICNT
1 2010-07-23 10:36:35 cp - 11 3
2 2010-07-23 10:37:22 cp - 8 3
3 2010-07-23 10:38:13 ss - 615 4
4 2010-07-23 10:38:58 cp - 77 5
5 2010-07-23 10:39:05 cp - 21 10
6 2010-07-23 10:39:12 cp - 26 7
7 2010-07-23 10:39:43 cp i 8 7
rdl@linage:/tmp$ ls -lad t*
drwxrwxrwx 3 root root 4096 2010-07-23 10:39 t
drwxrwxrwx 2 rdl rdl 6 2010-07-23 10:36 t2
-rw-r--r-- 1 rdl rdl 1049624576 2010-07-23 10:36 test.img
rdl@linage:/tmp$ mount|grep loop
/dev/loop0 on /tmp/t type nilfs2 (rw,gcpid=2980)
rdl@linage:/tmp$ sudo mount -t nilfs2 -o ro,cp=3,loop=/dev/loop1
/tmp/test.img /tmp/t2
mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
:(
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Error while testing (using loop device)
[not found] ` <AANLkTikY4joAzVe-3BSpX9KNSmFPr8cXqpJ_0pJ+rX0P-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2010-07-23 16:31 ` Ryusuke Konishi
0 siblings, 0 replies; 4+ messages in thread
From: Ryusuke Konishi @ 2010-07-23 16:31 UTC (permalink / raw)
To: rdeleonp-Re5JQEeQqe8AvxtiuMwx3w; +Cc: linux-nilfs-u79uwXL29TY76Z2rM5mHXA
Hi,
On Fri, 23 Jul 2010 10:47:38 -0500, Rodrigo_E._De_León_Plicet wrote:
> On Thu, Jul 22, 2010 at 9:31 PM, Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org> wrote:
> > How about this?
> >
> > $ sudo mount -t nilfs2 -o ro,cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
> >
> > or
> >
> > $ sudo mount -t nilfs2 -r -o cp=3,loop=/dev/loop0 /tmp/test.img /tmp/t2
> > ...
> > $ sudo umount /tmp/t2
>
> Hi. Thanks for the reply.
>
> rdl@linage:/tmp$ lscp
> CNO DATE TIME MODE FLG NBLKINC ICNT
> 1 2010-07-23 10:36:35 cp - 11 3
> 2 2010-07-23 10:37:22 cp - 8 3
> 3 2010-07-23 10:38:13 ss - 615 4
> 4 2010-07-23 10:38:58 cp - 77 5
> 5 2010-07-23 10:39:05 cp - 21 10
> 6 2010-07-23 10:39:12 cp - 26 7
> 7 2010-07-23 10:39:43 cp i 8 7
>
> rdl@linage:/tmp$ ls -lad t*
> drwxrwxrwx 3 root root 4096 2010-07-23 10:39 t
> drwxrwxrwx 2 rdl rdl 6 2010-07-23 10:36 t2
> -rw-r--r-- 1 rdl rdl 1049624576 2010-07-23 10:36 test.img
>
> rdl@linage:/tmp$ mount|grep loop
> /dev/loop0 on /tmp/t type nilfs2 (rw,gcpid=2980)
>
> rdl@linage:/tmp$ sudo mount -t nilfs2 -o ro,cp=3,loop=/dev/loop1
> /tmp/test.img /tmp/t2
> mount.nilfs2: Error while mounting /dev/loop1 on /tmp/t2: Read-only file system
>
> :(
This looks limitation of the loop devices.
Try the next one for snapshot mounts.
$ sudo mount -t nilfs2 -o ro,cp=3 /dev/loop0 /tmp/t2
Regards,
Ryusuke Konishi
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[not found] ` <AANLkTikwTRGooDQD+Uo08MkywS+KJ8BXxqqytxbNFiqr-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-07-22 19:26 ` Error while testing (using loop device) Rodrigo E. De León Plicet
[not found] ` <AANLkTin0qMJvDgs705a9Nu0hWNLCdGEXWn7q_2sXQ6yZ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-07-23 2:31 ` Ryusuke Konishi
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2010-07-23 15:47 ` Rodrigo E. De León Plicet
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