V/386 + 630Mb ESDI = Trouble?

[Larry Jones]

Well, I just got myself a 630Mb ESDI disk (a CDC Wren with 1630
cylinders, 15 heads, and 53 sectors/track) and a Western Digital
WD1007V-SE2 controller which I'm trying to use with Microport
System V/386 3.0e and, as you can see from the subject, I'm
having a bit of trouble.

I've formatted the drive, partitioned it, and made file systems
without any apparent trouble, but now when I run fsck on the file
systems, I get non-repeatable results.  Once it will say the file
system is fine, next time there's a bad free list, next time it's
fine again.  Similarly, sometimes an fsck on the raw device will
be OK, but when run on the block device there's errors or vice
versa.

So, does anyone have any ideas how I can determine exactly where
the problem is?  Is it the disk, the controller, the hd driver,
or something else in the kernel?  Has anyone else used large ESDI
drives with V/386?  It claims to support them, but has anyone
actually done it?  Help?
----
Larry Jones                         UUCP: uunet!sdrc!scjones
SDRC                                      scjones at SDRC.UU.NET
2000 Eastman Dr.                    BIX:  ltl
Milford, OH  45150-2789             AT&T: (513) 576-2070
"I have plenty of good sense.  I just choose to ignore it."
-Calvin