Public bug reported:
Hello,
When willing to access my drive I get an error message reporting an Ata
exception, then Hard resetting link.
This happens sometimes just 3 or for times consecutively, when data
transferred to the disk is small and then back to the shell. But it will
happen nearly always. Some other times, when data is big, it will loop
forever.
Therefore, I cannot install, even using the alternate disk. Having bootstrapped
jaunty from Kubuntu 8.10 (THIS IS THE ONLY LINUX DISTRIBUTION I WAS ABLE TO
INSTALL, SLOW BUT INSTALLED), I get rid of these messages by disabling write
cache and seems to solve the problem:
hdparm -W0 /dev/sda
But it sometimes happened during the boot while remounting the root file system
in rw mode, or if a check was forced. And in that case I can only unplug the
current !
The trick boot parameter "nomsi" has no effect on my VAIO VGN-A517B.
This happens also with Debian Lenny & Gentoo, so seems to be a kernel
problem. My disk is fine, all tools reported no errors. I've seen some
similar bugs but never with the exact same error message.
The strange thing is that I get 900 and 30 MB/sec by hdparm -Tt /dev/sda
BEFORE arriving in the disk detection. However it will freeze even
before the disk detection if I try to format a partition.
I join the data I could get from the installer before freeze, other data
I could not get due to freezes are with bug 365884 (extracted thanks to
the bootstrap.
Thanks for your work!
Bye
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Sata exception loop
https://bugs.launchpad.net/bugs/370320
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