Insight requested on RA81 problems

[tbray at mprvaxa.UUCP]

(Posted on behalf of a netless friend)

VAX 750, one each RA81 and RA60, TU78, 2 x DMF, nothing fancy.
At frequent intervals the following two lines appear on the console:

uda0:hard error, disk transfer error, unit 1, grp 0x0 hdr 0x5de34
uda0:hard error, SDI error, unit 1, event 0353, hdr 0x0

They have had one runaround with this disk already, and the above is
meaningless to DEC Field Service.  They have a binary system, and
would appreciate some predigested wisdom from anyone with experience
with it.
Tim Bray {ihnp4!alberta, decvax!microsoft} !ubc-vision!mprvaxa!tbray