[PLUG] IDE oddities
Eric Wilhelm
scratchcomputing at gmail.com
Sat Apr 1 08:52:21 UTC 2006
Anybody seen this sort of thing before?
dd if=/dev/urandom of=/tmp/randfile bs=1024k count=5
md5sum /tmp/randfile > /var/tmp/p1
umount /tmp
mount /tmp
md5sum /tmp/randfile > /var/tmp/p2
cat /var/tmp/p?
e602832f95ef1f395c3dc98a4428b35a /tmp/randfile
0ba83cd02d0e182db2a551891a9ecaa9 /tmp/randfile
I can't quite figure out why some files change in subtle ways after
remounting the drive. At this point, I'm blaming the motherboard,
power supply, or some other subtle issue.
I started in the installed OS with the drive on a promise pci card, got
the same results with the on-board IDE, and again with a rescue CD,
plus all of those scenarios with a different disk in the same box.
Both drives work fine in a usb enclosure hung on a different machine.
What I can't figure out is why the other (root) drive gave me no trouble
(though I didn't test that with the remounting, etc. and it's been up
for the ~150 days since I installed it -- so maybe that drive didn't
get unmounted enough times to suffer the bitrot?)
This is an old (200MHz NEC) box that's been through quite a lot. I
suppose it is time to hang it up and get something slightly younger and
blonder from freegeek.
--Eric
--
"It is impossible to make anything foolproof because fools are so
ingenious."
--Murphy's Second Corollary
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