Comment 6 for bug 1552551

Last of details I can supply unless someone wants me to test 14.10 or 15.04 releases. I'd have to redownload or find a DVD and a drive that reads them to PXE it since the only DVD I could find won't read in the drives I have.

Ubuntu 9.10 works both 32 and 64 bit just fine.
15.10 hangs, both 32 and 64 bit.
Setting /sys/class/block/sd?/device/timeout to very small (5) or very large (90) doesn't help, but a small timeout seems to be less likely to return a read-error to userspace.
I tried the 4.5 rc7 candidate from upstream, as well as the rc6, and it still occurs there (64-bit only tested).
Booting with "nosmp" option at first seemed to help, I didn't get a hang until 95G had been read, but they were regular after that.

Dan