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#1 2008-10-14 17:36:27

cool
Member
Registered: 2008-09-12
Posts: 111
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[SOS] a partition on backup drive can't be mounted

I can't mount a partition present on one of my backup drives.
I ran fsck on this partition, and after that its being detected as "ext4" yikes
HDD is working perfectly fine and data on NTFS partition can be access easily.

I just hope my Data on it is safe.

gaurish  ~  $   sudo fdisk -l    
Partition table entries are not in disk order

Disk /dev/sdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x087f1d56

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               2       38913   312560640    f  W95 Ext'd (LBA)
/dev/sdb5               2       26557   213311038+   7  HPFS/NTFS
/dev/sdb6           26558       38913    99249538+  83  Linux
gaurish  ~  $   sudo mount -t ext4 /dev/sdb6 /media/fl/
mount: unknown filesystem type 'ext4'
gaurish  ~  $   sudo mount -t ext3 /dev/sdb6 /media/fl/
mount: wrong fs type, bad option, bad superblock on /dev/sdb6,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
gaurish  ~  $   dmesg | tail
sd 2:0:0:0: [sdb] Assuming drive cache: write through
sd 2:0:0:0: [sdb] 625142448 512-byte hardware sectors (320073 MB)
sd 2:0:0:0: [sdb] Write Protect is off
sd 2:0:0:0: [sdb] Mode Sense: 00 38 00 00
sd 2:0:0:0: [sdb] Assuming drive cache: write through
 sdb: sdb1 < sdb5 sdb6 >
sd 2:0:0:0: [sdb] Attached SCSI disk
sd 2:0:0:0: Attached scsi generic sg1 type 0
usb-storage: device scan complete
EXT3-fs: sdb6: couldn't mount because of unsupported optional features (ca9bc1e0).

Please help

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#2 2008-10-14 21:42:24

fukawi2
Forum Moderator
From: .vic.au
Registered: 2007-09-28
Posts: 5,611
Website

Re: [SOS] a partition on backup drive can't be mounted

cool wrote:
gaurish  ~  $   sudo fdisk -l    
Partition table entries are not in disk order

Disk /dev/sdb: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x087f1d56

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               2       38913   312560640    f  W95 Ext'd (LBA)
/dev/sdb5               2       26557   213311038+   7  HPFS/NTFS
/dev/sdb6           26558       38913    99249538+  83  Linux

Interesting. I'd be fixing the partition table entries order first cause that's a weird screwed up order they're in!
From http://www.mail-archive.com/grub-devel@ … 02449.html
Start fdisk on the drive, enter the advanced menu ('x') and them 'm' to fix the partition order. Don't forget to 'w' to write them.

It probably won't fix your problem, but it will help straighten things out working towards fixing it smile

Last edited by fukawi2 (2008-10-14 21:42:58)

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#3 2008-10-15 05:14:11

cool
Member
Registered: 2008-09-12
Posts: 111
Website

Re: [SOS] a partition on backup drive can't be mounted

Will this erase data present on the drive?
If yes, then i don't want to do this

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#4 2008-10-15 06:04:37

fukawi2
Forum Moderator
From: .vic.au
Registered: 2007-09-28
Posts: 5,611
Website

Re: [SOS] a partition on backup drive can't be mounted

cool wrote:

Will this erase data present on the drive?

No - but as per the link, you may have to update Grub and fstab to reflect possible changes in the partition numbering.

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#5 2008-10-15 10:33:06

cool
Member
Registered: 2008-09-12
Posts: 111
Website

Re: [SOS] a partition on backup drive can't be mounted

Will that make sdb6 partition readable?

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#6 2008-10-15 11:58:22

fukawi2
Forum Moderator
From: .vic.au
Registered: 2007-09-28
Posts: 5,611
Website

Re: [SOS] a partition on backup drive can't be mounted

fukawi2 wrote:

It probably won't fix your problem, but it will help straighten things out working towards fixing it smile

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