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e2fsck 0.5a -> error: Block bitmap nn for group yy not in group

e2fsck 0.5a -> error: Block bitmap nn for group yy not in group

Post by Johan Magnuss » Sat, 19 Nov 1994 17:41:15



I ran into trouble yesterday as our main Linux machine came to a
halt. Nothing seemed to work except an occational ping to the ethernet
card. The reset button was the only solution since all VCs had frozen
and telnetd seemed out of order. After the reboot the kernel was
unable to mount root and paniced. Now, this has happened before, and I
had a bootdisk + rootdisk ready, which would enable me to do a manual
fsck on the rootdevice. The magic formula, which has always worked for
me in the past, 'fsck -t ext2 -a /dev/sda3' only gave the error
message

'Block bitmap 790647877 for group 32 not in group'

and returned me to the prompt.

System stats:

Micropolis 1.7GB 5.25" FH SCSI-2 HD + Conner 240MB IDE
Adaptec 1542c SCSI-adapter
Acer 486Dx2/66, 24MB Ram

Is there a solution to my problem? Can i manipulate blocks to clear
them of unwanted data?

/Johan

++++++++++++++++++++++++++++++++++++++++++++

Lysator ACS, Linkoping University
Sweden

 
 
 
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e2fsck 0.5a -> error: Block bitmap nn for group yy not in group

Post by Mark Lo » Mon, 21 Nov 1994 00:36:36


<I ran into trouble yesterday as our main Linux machine came to a
<halt. Nothing seemed to work except an occational ping to the ethernet
<card. The reset button was the only solution since all VCs had frozen
<and telnetd seemed out of order. After the reboot the kernel was
<unable to mount root and paniced. Now, this has happened before, and I
<had a bootdisk + rootdisk ready, which would enable me to do a manual
<fsck on the rootdevice. The magic formula, which has always worked for
<me in the past, 'fsck -t ext2 -a /dev/sda3' only gave the error
<message
<
<'Block bitmap 790647877 for group 32 not in group'
<
<and returned me to the prompt.

Login and run fsck manually.  If it says "root login not permitted on this tty"
then login as someone else and then "su".  
--


 
 
 
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1. e2fsck 0.5a -> error: Block bitmap nn for group yy not in group


   Date: 18 Nov 1994 08:41:15 GMT

   I ran into trouble yesterday as our main Linux machine came to a
   halt. Nothing seemed to work except an occational ping to the ethernet
   card. The reset button was the only solution since all VCs had frozen
   and telnetd seemed out of order. After the reboot the kernel was
   unable to mount root and paniced. Now, this has happened before, and I
   had a bootdisk + rootdisk ready, which would enable me to do a manual
   fsck on the rootdevice. The magic formula, which has always worked for
   me in the past, 'fsck -t ext2 -a /dev/sda3' only gave the error
   message

   'Block bitmap 790647877 for group 32 not in group'

   and returned me to the prompt.

Your block group descriptors on your filesystem got trashed.  You should
hopefully be able to recover by telling e2fsck to use the backup
superblock and block group descriptors:

e2fsck -b 8193 /dev/sda3

Good luck!

                                                - Ted

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