Chuck Anderson wrote:
On Mon, May 26, 2008 at 12:30:54PM -0700, Douglas McClendon wrote:
Andrew Overholt wrote:
* Andrew Overholt <overholt@xxxxxxxxxx> [2008-05-26 09:54]:
I've made some live USB sticks with persistent overlays for a few
people. 3 of the people have now told me that they can no longer boot
as they get IO errors with what looks like corrupted filesystems.
2 of the 3 have now confirmed for me that they hit hard lockups while
running and had to hard-reboot their machines. Afterwards, they could
not re-boot from the USB stick.
Andrew
Well known nature of the feature. See a post of mine on fedora-livecd-list
https://www.redhat.com/archives/fedora-livecd-list/2008-May/msg00051.html
I've suggested several times over the last 6 months that this issue be
well documented to set expectations appropriately.
I don't understand how it could corrupt the UNDERLYING vfat partition,
but that is what happend to me twice. I was unable to mount the USB
stick as a normal vfat data drive from a regular (non-Live) booted
system after filling and crashing the persistent overlay when it was
booted as a Live USB system. It seems there is a vfat bug that is
corrupting the filesystem.
Agreed, any vfat corruption would be seem to be due to kernel bugs
outside of liveusb persistence, though perhaps it is better at
triggering the bugs than typical usage. I have run across similar vfat
corruption on usbsticks with linux. So bad that an fsck.vfat goes
basically crazy, i.e. asks a million questions, and if you do yes to
all, results in a filesystem that is mountable but very corrupt, but
vaguely reminiscent of the original contents.
But note, the original post doesn't mention that kind of problem. Just
that they can't boot, with what looks like a corrupted filesystem (which
sounds like the natural behaviour when booting with a persistent liveusb
that had filled up its overlay).
-dmc
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