Re: Bad magic number and
On Wed, Dec 26, 2012 at 12:19 PM, sham pavman shampavman...@gmail.com wrote: SNIP mkfs -t ext4 /dev/sdb I support what Prashant said (I am not careful here), you should use: mkfs.ext4 /dev/sdb1 then mount /dev/sdb1 -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
Hi... On Wed, Dec 26, 2012 at 12:19 PM, sham pavman shampavman...@gmail.com wrote: SNIP mkfs -t ext4 /dev/sdb mke2fs 1.42 (29-Nov-2011) try using mkfs.ext4 instead -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
I've tried that as well.. and the result is the same. I've little idea on how to start debugging. If you can provide some info it would be great. Thanks On Fri, Dec 28, 2012 at 6:37 AM, Mulyadi Santosa mulyadi.sant...@gmail.comwrote: Hi... On Wed, Dec 26, 2012 at 12:19 PM, sham pavman shampavman...@gmail.com wrote: SNIP mkfs -t ext4 /dev/sdb mke2fs 1.42 (29-Nov-2011) try using mkfs.ext4 instead -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
On Thu, Dec 27, 2012 at 8:29 PM, sham pavman shampavman...@gmail.comwrote: I've tried that as well.. and the result is the same. I've little idea on how to start debugging. If you can provide some info it would be great. What does dumpe2fs -h give ? Thanks - Manish Thanks On Fri, Dec 28, 2012 at 6:37 AM, Mulyadi Santosa mulyadi.sant...@gmail.com wrote: Hi... On Wed, Dec 26, 2012 at 12:19 PM, sham pavman shampavman...@gmail.com wrote: SNIP mkfs -t ext4 /dev/sdb mke2fs 1.42 (29-Nov-2011) try using mkfs.ext4 instead -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- Thanks - Manish ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
Hi, On Fri, Dec 28, 2012 at 10:57 AM, Manish Katiyar mkati...@gmail.com wrote: On Thu, Dec 27, 2012 at 8:29 PM, sham pavman shampavman...@gmail.com wrote: I've tried that as well.. and the result is the same. I've little idea on how to start debugging. If you can provide some info it would be great. Check your mkfs and mount commands. You have specified the whole disk instead of partition. It should be... mkfs -t ext4 /dev/sdb1 mount -t ext4 /dev/sdb1 /mnt/test Regards. ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
Here is the output # dumpe2fs -h /dev/sdb dumpe2fs 1.42 (29-Nov-2011) dumpe2fs: Bad magic number in super-block while trying to open /dev/sdb Couldn't find valid filesystem superblock. On Fri, Dec 28, 2012 at 10:57 AM, Manish Katiyar mkati...@gmail.com wrote: On Thu, Dec 27, 2012 at 8:29 PM, sham pavman shampavman...@gmail.comwrote: I've tried that as well.. and the result is the same. I've little idea on how to start debugging. If you can provide some info it would be great. What does dumpe2fs -h give ? Thanks - Manish Thanks On Fri, Dec 28, 2012 at 6:37 AM, Mulyadi Santosa mulyadi.sant...@gmail.com wrote: Hi... On Wed, Dec 26, 2012 at 12:19 PM, sham pavman shampavman...@gmail.com wrote: SNIP mkfs -t ext4 /dev/sdb mke2fs 1.42 (29-Nov-2011) try using mkfs.ext4 instead -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- Thanks - Manish ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
Hi, On Fri, Dec 28, 2012 at 11:35 AM, sham pavman shampavman...@gmail.com wrote: Here is the output # dumpe2fs -h /dev/sdb dumpe2fs 1.42 (29-Nov-2011) dumpe2fs: Bad magic number in super-block while trying to open /dev/sdb Couldn't find valid filesystem superblock. Try $partprobe $fdisk -l Regards ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: Bad magic number and
On Fri, Dec 28, 2012 at 11:44 AM, Prashant Shah pshah.mum...@gmail.comwrote: Hi, On Fri, Dec 28, 2012 at 11:35 AM, sham pavman shampavman...@gmail.com wrote: Here is the output # dumpe2fs -h /dev/sdb dumpe2fs 1.42 (29-Nov-2011) dumpe2fs: Bad magic number in super-block while trying to open /dev/sdb Couldn't find valid filesystem superblock. Try $partprobe $fdisk -l No use.. # partprobe root@Not-Specified:/home/z# fdisk -l Disk /dev/sda: 60.0 GB, 60022480896 bytes 255 heads, 63 sectors/track, 7297 cylinders, total 117231408 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000539c8 Device Boot Start End Blocks Id System /dev/sda1 *20487812505539061504 83 Linux /dev/sda27812710282124799 19988495 Extended /dev/sda57812710482124799 1998848 82 Linux swap / Solaris Disk /dev/sdb: 300.1 GB, 300101401088 bytes 255 heads, 63 sectors/track, 36485 cylinders, total 586135549 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x --- Does this look fishy? Disk /dev/sdb doesn't contain a valid partition table Regards ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Bad magic number and
Hi all,
I'm having a problem with a SCSI driver...
When I load the module (from dmesg) I see that everything has worked fine.
and the output of fdisk -l shows the
SNIP
sudo fdisk -l
Disk /dev/sda: 60.0 GB, 60022480896 bytes
255 heads, 63 sectors/track, 7297 cylinders, total 117231408 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000539c8
Device Boot Start End Blocks Id System
/dev/sda1 *20487812505539061504 83 Linux
/dev/sda27812710282124799 19988495 Extended
/dev/sda57812710482124799 1998848 82 Linux swap / Solaris
Disk /dev/sdb: 300.1 GB, 300101401088 bytes -- this is the guy
255 heads, 63 sectors/track, 36485 cylinders, total 586135549 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x
Disk /dev/sdb doesn't contain a valid partition table
SNIP
So i used fdisk on sdb to manually write the tables in and it succeeded
SNIP
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-586135548, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-586135548, default 586135548):
Using default value 586135548
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
SNIP
THen i used mkfs to create a new ext4 partition and even that went fine.
SNIP
mkfs -t ext4 /dev/sdb
mke2fs 1.42 (29-Nov-2011)
/dev/sdb is entire device, not just one partition!
Proceed anyway? (y,n) y
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
18317312 inodes, 73266943 blocks
3663347 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
2236 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632,
2654208,
4096000, 7962624, 11239424, 2048, 23887872, 71663616
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
root@ocz-Not-Specified:/home/ocz/Shampavman/OCZ_XEN_Final_Source_code# echo
$?
0
SNIP
But then when i tried to mount it on /mnt things fail.
SNIP
mount -t ext4 /dev/sdb /mnt/test
mount: wrong fs type, bad option, bad superblock on /dev/sdb,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
dmesg.
[495515.858203] EXT4-fs (sdb): VFS: Can't find ext4 filesystem
SNIP
=
Some pointers, While diving into this issue i figured out that the magic
number on this device is not the same as EXT4_SUPER_MAGIC macro that is
checked for in the super.c (fs/ext4/super.c) .
Can anyone please help me in figuring out a solution for this.?
Thanks
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