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    SubjectRe: 2.4.1 not fully sane on Alpha - file systems
    On Wed, 31 Jan 2001, Michal Jaegermann wrote:

    > I just tried to boot 2.4.1 kernel on Alpha UP1100. This machine
    > happens to have two SCSI disks on sym53c875 controller and two IDE
    > drives hooked to a builtin "Acer Laboratories Inc. [ALi] M5229 IDE".

    ALI M1535D pci-ide bridge, isn't it? That's what the specs on
    API's webpage seem to indicate.

    > It boots and in the first moment makes even a pretty good impression
    > of beeing healthy. But an attempt to compile something causes the
    > whole setup to start behaving weird, with a compiler obviously unable
    > to find both itself and the right sources, and the whole thing ends in
    > a silent lockup.

    Try this for fun: dd if=/dev/hda of=/dev/null bs=4096, and see if it
    cronks out.

    In my case, any serious I/O on the IDE drives quickly results in pretty
    technicolor on the VGA screen, and then a hard lockup.

    Furthermore, after power-reset, 2.4.x, x=0 or 1, cannot successfully fsck
    the drives. It hangs after about the 2nd-3rd partition, again in a hard
    lockup.

    I have to boot into 2.2.x to fsck the drives, make changes, and reboot to
    hang the system.

    My WAG is that there are problems in the ALI driver.

    > On the second boot I tried to copy kernel sources from a SCSI to an
    > IDE drive. This time I got something in my logs and the same stuff
    > was printed on my screen before everything lockded up really tight
    > again (no sysrq). Here it is:
    >
    > kernel: attempt to access beyond end of device
    > kernel: 08:05: rw=0, want=198500353, limit=5779456
    > kernel: attempt to access beyond end of device
    > kernel: 08:05: rw=0, want=4294934529, limit=5779456
    > kernel: attempt to access beyond end of device
    > kernel: 08:05: rw=0, want=198500353, limit=5779456
    > kernel: EXT2-fs error (device sd(8,5)): ext2_readdir: bad entry in
    > directory #250255: directory entry across blocks - offset=0,
    > inode=198505472, rec_len=32768, name_len=255
    >
    > (and the machine dies at this point).

    AIC7xxx controller, just recently started spewing errors very similar to
    this -- amongst a host of others, as I was trying to get the UP1100 to use
    a generic IDE interface rather than the ALI 15x3.


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