Booting Problem After Power Loss (fsck)?
rchopra at cal.berkeley.edu
Mon Feb 9 21:16:07 PST 2004
I do not have the FIX-IT CD or another FreeBSD machine.
Is there another fellow FreeBSD'er in the Bay Area, CA that can
volunteer to help me troubleshoot the card as described below (e.g. plug
in the card and break to debugger to gather info)? I can drive over to
your place or you can come over to my house (directions on my homepage).
If it helps, my perspective is that meeting up is totally positve and
the only thing left keeping me involved with computing - allow me to
The server was totally idle when the power was cut, and I didn't make
any changes while the server was down. I've seen some crazy things
working on computers before (I can show you a list, post one to the
newsgroup, or if you're curious you can try searching the google groups
link on my homepage.) This would by far have to the most stubborn,
underhanded, mean, nasty and implausable error I've ever come accross.
I could really use some help getting the filesytem up again; my heart
can't take another failure like this, and I'm ready to give up computers
(recreationally and professionally) if I can't get this problem fixed.
I had just finished recovering from a 2 year reconsolidation of life and
data (a 75GXP/Raid-0 failure and data loss occurred while I was studying
at UC Berkeley and triggered a very nasty chain of events culminating in
this problem.) I can't handle going through another data consolidation;
recovering from a recent thyroid removal and a 12-hour neck
dissection/removal is a full-time affair, and the 30 some-odd staples in
my neck greatly limit my ability to sit at the computer.
Looks like the important thing is for me to make a new friend in the
FreeBSD community and a new start on computing, or bid y'all adieu.
Ion-Mihai Tetcu wrote:
> On Sun, 08 Feb 2004 21:12:51 -0800
> Rishi Chopra <rchopra at cal.berkeley.edu> wrote:
>>Here's a summary of my problem so far:
>>Server was idle (e.g. absolutely no processes running aside from
>>csh, ttyv0 and ps) when power was cut; server reports a problem mounting
>>/usr partition upon reboot.
>>I have since tried the following:
>>(1) Booted into single-user mode and ran 'fsck' - the latest output to
>>the terminal says:
>>**** FILE SYSTEM MARKED CLEAN ****
>> Last Mounted on /usr
>> Phase 1 - check blocks and sizes
>>After letting the system 'do its thing' for 5+ days, the output did not
>>(2) I tried an 'fsck -p' and got the following message:
>>/dev/da0s1a: 1128 files, 36058 used, 47059 free (261 frags, 58771
>>blocks, 0.1% fragmentations)
> Do you get the prompt back ? Try fsck -p on / then on /var /tmp and last
> /usr. At least you will know what partitions are ok. Better yet I
> suggest you boot from the second aka Fixit CD and run fsck from there;
> you fsck binary may be broken. Also boot verbose (I don't know if
> safe-mode applies to SCSI, but if it does, try that also).
>>The display has been stuck with that same output for countless hours now.
> Do you have disk activity when fsck seems to be stuck ?
>>Questions I have:
>>(1) Have I suffered a total loss or is this still some way to revover my
>>filesystem? After suffering a similar loss with a hardware raid-0
>>failure under win2k, I was assuming the FreeBSD setup would be more
>>durable. I would hate to walk away thinking that a simple power loss
>>could wipe out a freebsd server under nothing more than one terminal login.
> Generally this doesn't happen. From my experience, it happens if either
> there are problems with the disk access infrastructure (a la timeouts,
> etc. on ata) or something bad elsewhere in the kernel.
>>(2) Why would a simple fsck of the filesystem not work in my case?
> If you have the kernel with
> options DDB
> options BREAK_TO_DEBUGGER
> and no disk activity I suggest that you break to debugger hitting
> Ctrl+Esc and try to gather some info from there. Note that in case fsck
> is actually running this could further damage you fs, but since you
> can't do anything else I would say to give it a try.
> To summarize:
> 1. See if you have disk activity when fsck seems to be stuck.
> 2. Try fsck (-p) first on root, the on tmp, /var, /usr, /home.
> 3. Esp. if fsck / doesn't go ok try booting verbose with Fixit CD and
> run fsck from there.
> 4. If 1 gets you the same results try putting the disk in another
> machine where you have debugging options in the kernel, break to
> debugger and gather info from there (esp. if you're running 5.x try
> asking on current@ what exactly to look for in the debugger).
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