Re: URGENT: Panic Problems
Re: URGENT: Panic Problems
- Subject: Re: URGENT: Panic Problems
- From: Rick Sulack <email@hidden>
- Date: Wed, 1 Apr 2009 22:40:11 -0700
On Apr 1, 2009, at 7:11 PM, George Plymale wrote:
Hi, I am having a nightmare at the moment. I woke up this morning
and my system had panicked. It is a MacPro with a software RAID 01
configuration. I rebooted and the system tried to start, got some
way into the init it appeared even though I did not having it
booting verbosely and then panicked again. The next time it would
simply not recognize any bootable drive. It seems that I can get
into single user mode, but cannot load the root fs.
I drove a couple hours away to an Apple store and we spoke for a
while, but they refused to do anything as they were not allowed to
do so. One fellow there seemed fairly confident that it would
rebuild properly as we had, at that time assumed that a drive was
bad. They listened and one of the drives appeared to sound clunky
as though it had the click of death, so I figured that to be true.
I brought the machine home with a couple new drives to replace the
bad one with, took each drive out and listened to them initialize
outside of the machine as the store was quite noisy and
unfortunately that was the standard initialization of each machine.
It appeared as though there was nothing really physically wrong with
the drives, plus when printing out the raid information from
diskutil none showed to be degraded nor did they have any SMART
failure.
I had already, though, tried to replace the drive and it had
restarted to build, but about 10 minutes in the OS panicked again.
So then that was when I thought that perhaps the drive was not bad
and then replaced the new drive with the old one to see what would
happen. Same thing, it tried to rebuild the array and then about 10
minutes in, it would panic. This panic happened on a Tech Tool Pro
boot eDrive and an install DVD. It also appears to happen when a
rebuild is not running and the OS is simply idling.
I did not have enough time to write the entire panic stack down
here, but could reproduce it and go back and type it up for you in
this email. The first line in the backtrace was had to do with:
com.apple.comkext.aty_lamna
The last line I believe had something to do with the Nvidia graphics
card if I recall correctly.
Given the above and the panic log from your other email doesn't sound
like this is RAID related.
I am in desperate need to recover this array. I will loose 2 weeks
of work plus all of my family photos and some videos if I cannot
rebuild this. I fear that there is more of a root cause here vs.
RAID failure. Any thoughts or ideas as to how I should track this
down and recover from this issue?
You only need one drive to recover your data. The drive you removed
and then replaced again is no longer complete until you finish
rebuilding it again, but even so, you should be able to get some data
off it if you have to. The other drive should be fine.
I would recommend removing your good drive and keeping it somewhere
safe (and labeled). Panics are great way to corrupt data. Then try
to figure out what is wrong with your machine by reinstalling the OS
on a different drive if you can. The panic looks video card related.
Maybe it's a bad video card or bad memory or ... I would try
swapping things until your machine seems to be working again.
Once you get the machine up and running again, then try putting the
good half of the raid mirror back in the machine and backing it up.
Mirror are not replacement for backups. Once you have a back up then
try to rebuild the mirror. The most important thing is to try and
make a backup before you start messing around. Ideally, you should
have had already had made a backup.
Good luck, rick
__
rick sulack
darwin core os group
apple, inc
--------------------------------------------------------------
"More computing sins are committed in the name of efficiency (without
necessarily achieving it)
than for any other single reason - including blind stupidity" -Wulf 1972
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