4.2BSD installation mystery ...

[dan at rna.UUCP]

	In bringing up 4.2BSD on an 11/750 with SC750 and 2 Eagles, I
encountered a mystery. After reading in /usr/sys and /usr, I did a fsck
on the /usr pseudo disk, which came out fine, but then I did a fsck on
/usr using the block device entry which gave me an unreadable disk block.
A dcheck on /dev/rhp0h also gave me an error. I thought it might be a bad
or flakely sector on the disk except that I tried the whole procedure
again on the same disk after reformatting it more carefully, and again on
the second disk drive. Both trials yielded the same result down to the same
block number which was unreadable. What am I missing ? When will using the
raw device versus the block device with fsck give you a different result ?
Is dcheck supposed to be functional ? I don't think I believe its output.

					Thanks,

					...cmcl2!rna!dan