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Old 2nd January 2009, 20:55
kevinluu kevinluu is offline
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Default Bad magic number in super-block while trying to open /dev/sda2

Dear Mr. Falko,

First of all, i would like to thank you for the steps on "How To Resize ext3 Partitions Without Losing Data" that you post on the web-site.

I am very very new to Linux.

After cloning the original disk 250GB (/dev/sda2 in this disk has about 224GB) to a new 500GB disk, i then re-partition the /dev/sda2 to have about 490GB.

I then following the steps that show how to "Enlarging An ext3 Partition" from this link:


http://www.howtoforge.com/linux_resi...xt3_partitions


One of these steps ask me to enter the command: fsck -n /dev/sda2
i got the error message as shown below:

"
...
...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sda2
...
...
"


However, if i enter command: fsck -n /dev/sda1
i got:

"
...
...
/boot: clean, 36/26104 files, 17488/104388 blocks
"

The comand : tune2fs -o^has_journal /dev/sda2
also shows error:

"
...
Bad magic number in super-block while trying to open /dev/sda2
Couldn't find valid filesystem superblock.
"



The /dev/sda2 in this new 500GB is the filesystem that i need to enlarge so that it can use the rest of the available space in this /dev/sda2 partition.

The "fdisk -l" command shows that the /dev/sda2 has about 490GB.

But when i do the "df -h" command shows that:

/dev/mapper/VolGroup00-LogVol00 (for some reason the original person who set up this system made the /dev/sda2 mapped to this /dev/mapper/VolGroup00-LogVol00) is about 224GB.

I was trying to follow the steps so that i can use the resize2fs command in the steps to enlarge the /dev/sda2 filesystem to have 490GB.



Would you please show me how can i fix this error:

"Bad magic number in super-block while trying to open /dev/sda2"

in my /dev/sda2 so that i can continue to follows the steps to successfully enlarge my /dev/sda2 to have 490GB.

Thank you very much.

Kevin
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