[Bugme-new] [Bug 16545] New: USB mass storage on i7 corrupts SATA filesystem

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Sun Aug 8 21:02:09 PDT 2010


https://bugzilla.kernel.org/show_bug.cgi?id=16545

           Summary: USB mass storage on i7 corrupts SATA filesystem
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.32-24-generic-pae
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: USB
        AssignedTo: greg at kroah.com
        ReportedBy: ajv-912-074-1956 at vsta.org
        Regression: No


Newer i7 quad core with 6GB of RAM running in 32 bit mode (problem verified
with and without PAE).  System installs and runs OK, but when I attach an
external 1.5TB drive via USB as an ext4 filesystem, and then back up a 1TB
filesystem onto it (using dump), I reliably get through about 75% of the
backup, and then I suddenly find the system offline--unresponsive to keyboard,
no disk activity, no response to pings.  On reset there is no sign of what
happened in the logs.

Post-crash fsck shows USB storage OK, partition being backed up OK, but root
filesystem has extensive corruption, requiring manual fsck and repair--in one
case, beyond the abilities of fsck and requiring a filesystem rebuild.

I suspected LVM, but have reproduced without it.  I thought it was the drive,
but have swapped in a new drive.  I thought it was a PAE issue, but reproduced
with a non-PAE kernel.  I am left to wonder if 32-bit kernels are hitting
something Bad when run on an i7 920 motherboard.  In about 2 weeks I'll be
swapping out this hardware in its entirety, at which point I can install 64-bit
and see if the problem still reproduces--somebody let me know if that's of
interest.

Otherwise I'm pretty much out of ideas.  This is the most messed up I've ever
seen a properly run system get.  I'm pretty sure it only happens with USB mass
storage I/O, and I have a moratorium on USB for the system--I'll update if we
hit corruption anyway.  So far it's looking OK.

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