ISC 2.2 Hangs on disk I/O

[Todd Merriman]

doug at pravda (Doug MacKenzie) writes:
>  Some times during disk I/O, the disk light will just stay on solid
>  and the system is locked up.  I can not get any response other than
>  turning the stupid thing off.

I have had the same symptoms on my system with Interactive 2.2,
SCSI disk, and SCSI tape.

After *much* fretting, I found that something was modifying
/unix.  Rebuilding the kernel (without reconfiguring) fixes the problem.
I can always count on it to happen shortly after rebuilding the system (disk
format, partitioning, install core and kconfig, then restoring 
everything from tape).  Even if I rebuild the kernel after restoring
everything, the symptoms will appear sometime later.  After again
rebuilding the kernel, everything works fine.

Note:  rebuilding the kernel many times will quickly fill your disk
containing the root file system.

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