Data recovery emergency on a downed server... Help please!!

[Madison Kelly]

I have passed the drive off to a data recovery house but if the drive is 
recovered and the drive is still intact when it's all over I will try 
this out for personal practice. Thank you!!

Madison

Robert Brockway wrote:
> On Mon, 29 Dec 2003, Madison Kelly wrote:
> 
> Hi Maddy.  I hope you got some sleep last night...
> 
> 
>>I know that backups of the superblock are made, do you know by chance how
>>to locate them and/or how to tell the OS to use one for mounting? Also, at
> 
> 
> No one mentioned this (and I didn't read TLUG yesterday) so here it is:
> 
> /sbin/dumpe2fs /dev/hdxy (where xy is a1, b2, etc) will give you this
> info.  There is quite a lot of output so redirect it to a file and read it
> with less, eg:
> 
> /sbin/dumpe2fs /dev/hde3 > /tmp/hde3.info
> 
> Search for the word "Superblock"
> 
> Now, take that number and use it with e2fsck -b,
> 
> Eg I have "Superblock at 163840" listed for /dev/hde3, so I could try:
> 
> e2fsck -b 163840 /dev/hde3.
> 
> Remember to only work on backup copies! See below.
> 
> 
>>least two partitions on the drive have gone bad...
> 
> 
> Different filesystems (partitions) being bad makes it far less likely it
> is a filesystem problem.
> 
> Also, the use of dd was mentioned.  This is good but there is no need to
> write it to a physical drive.  You can write the dd to a file and mount it
> using loopback and attempt recovery on that.  As long as you keep a good
> copy of the filesystem file around you can keep trying things over and
> over on copies.
> 
> Good luck.
> 
> Rob


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