This is a serious question and not intended as a troll.
I have a dying IDE hard drive that I want to try and recover some file from -
the problem is that with it connected to my box, both FreeBSD 4.9-RELEASE and
5.2-RC2 kernel panic.
This can be reliably duplicated by booting the machine with the drive not
connected, then plugging the drive in, and...
# atacontrol reinit 1
panic!
The real problem with this is that I can't use any tools to try and recover
any data. The GEOM code in 5.x is slightly more resiliant than the 4.x code,
but both cause panics.
On the other hand, it I boot a Knoppix Linux distro, it complains about the
drive, but it *doesn't* panic, crash or otherwise misbehave.
Is this caused by us not properly checking return codes that come back from
the ata driver, or something more insidious?
I would have thought the the expected behaviour was returning an error and not
a panic, especially if the problem is detected during initialisation of the bus.
Phil.
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At 2004-01-08 08:17:15+0000, Phil Kernick writes:> I have a dying IDE hard drive that I want to try and recover some > file from - the problem is that with it connected to my box, both > FreeBSD 4.9-RELEASE and 5.2-RC2 kernel panic. > > This can be reliably duplicated by booting the machine with the drive not > connected, then plugging the drive in, and... > > # atacontrol reinit 1 > panic! > > The real problem with this is that I can't use any tools to try and > recover any data. The GEOM code in 5.x is slightly more resiliant > than the 4.x code, but both cause panics. > > On the other hand, it I boot a Knoppix Linux distro, it complains > about the drive, but it *doesn't* panic, crash or otherwise > misbehave.Use Linux to dd the bits onto a clean drive, then try mounting that drive on FreeBSD? Nick B
Phil Kernick wrote:> > This is a serious question and not intended as a troll. > > I have a dying IDE hard drive that I want to try and recover some file from - > the problem is that with it connected to my box, both FreeBSD 4.9-RELEASE and > 5.2-RC2 kernel panic. > > This can be reliably duplicated by booting the machine with the drive not > connected, then plugging the drive in, and... > > # atacontrol reinit 1 > panic! > > The real problem with this is that I can't use any tools to try and recover > any data. The GEOM code in 5.x is slightly more resiliant than the 4.x code, > but both cause panics.ata(4) is known to be buggy at least in -STABLE after PAE integration. There is no one interested in fixing it (see also kern/57174, kern/60526). Eugene