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Full Discussion: How to create LVM snapshots?
Top Forums UNIX for Dummies Questions & Answers How to create LVM snapshots? Post 302933882 by admin_db on Monday 2nd of February 2015 05:16:40 PM
Old 02-02-2015
Hello,

I am unable to mount fs

Code:
[root@cindb1004a VGExaDb]# mount -t ext3 /dev/VGExaDb/data_snap /snap_db
mount: wrong fs type, bad option, bad superblock on /dev/VGExaDb/data_snap,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so


Please assist.


Best regards,
Vishal

---------- Post updated at 05:16 PM ---------- Previous update was at 05:10 PM ----------

Please refer to below error:

Code:
[root@cindb1004a VGExaDb]# dmesg | tail
Buffer I/O error on device dm-4, logical block 1
Buffer I/O error on device dm-4, logical block 2
Buffer I/O error on device dm-4, logical block 3
Buffer I/O error on device dm-4, logical block 4
Buffer I/O error on device dm-4, logical block 5
Buffer I/O error on device dm-4, logical block 6
Buffer I/O error on device dm-4, logical block 7
EXT3-fs: unable to read superblock
EXT3-fs: unable to read superblock
EXT3-fs: unable to read superblock


Regards,
Vishal
 

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LEARN ABOUT SUSE

dumpe2fs

DUMPE2FS(8)						      System Manager's Manual						       DUMPE2FS(8)

NAME

       dumpe2fs - dump ext2/ext3/ext4 filesystem information

SYNOPSIS

       dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device

DESCRIPTION

       dumpe2fs prints the super block and blocks group information for the filesystem present on device.

       dumpe2fs is similar to Berkeley's dumpfs program for the BSD Fast File System.

OPTIONS

       -b     print the blocks which are reserved as bad in the filesystem.

       -o superblock=superblock
	      use  the	block  superblock  when  examining the filesystem.  This option is not usually needed except by a filesystem wizard who is
	      examining the remains of a very badly corrupted filesystem.

       -o blocksize=blocksize
	      use blocks of blocksize bytes when examining the filesystem.  This option is not usually needed except by a filesystem wizard who is
	      examining the remains of a very badly corrupted filesystem.

       -f     force  dumpe2fs to display a filesystem even though it may have some filesystem feature flags which dumpe2fs may not understand (and
	      which can cause some of dumpe2fs's display to be suspect).

       -h     only display the superblock information and not any of the block group descriptor detail information.

       -i     display the filesystem data from an image file created by e2image, using device as the pathname to the image file.

       -x     print the detailed group information block numbers in hexadecimal format

       -V     print the version number of dumpe2fs and exit.

BUGS

       You need to know the physical filesystem structure to understand the output.

AUTHOR

       dumpe2fs was written by Remy Card <Remy.Card@linux.org>.  It is currently being maintained by Theodore Ts'o <tytso@alum.mit.edu>.

AVAILABILITY

       dumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net.

SEE ALSO

       e2fsck(8), mke2fs(8), tune2fs(8)

E2fsprogs version 1.41.11					    March 2010							       DUMPE2FS(8)
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