At 06:55 PM 10/6/2005, RYAN vAN GINNEKEN wrote:
My freebsd 4.11 system has been subjected to a power failure and
seems to have many disk errors something about soft updates and not
being able to read certain sectors it comes up with the standard
single user pick your shell command and tells me to run fsck
manually. I have run it several times but the system keeps comming
with ad0s4 marked dirty which is my /usr partition. Sometimes i get
a resetting device ata0 timeout error. What should i do of course i
have no current backups for this system and the most important thing
is retrieving my users data it would be great if i could get the
system to boot up but if i have to reinstall no biggy as long as i
can get most of my data back.
ps i promise to do remote backups nightly for the rest of my life.
Sounds like you definitely have some problems.
If you have somewhere to put it, you can use dd with
conv=noerror,sync to get an image of the drive, less the damaged
areas (which get filled in with nul's by the sync option). Once you
have the image, you can use it as a backing store for md(4), fsck
that, mount it and get whatever you can from what's left.
-Glenn
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