2nd disk ... with errors

[Karl Swartz]

As of the wee hours of this morning, ditka is up and running with
two disk drives.  (Thanks Gil and Lenny!)  Drive 0 is a Maxtor
XT-2190, currently configured with only 8 of the 15 heads, and
drive 1 is the original MiniScribe 6085.

Unfortunately, the MiniScribe is showing a rather high error rate
in /usr/adm/unix.log.  As it ran for two years with a total of
maybe two or three errors, I suspect this is due to the two disk
upgrade.  Before I start a rather tedious session of reconfiguring
and testing, does anybody have any suggestions on where I might
look for the problem based on the attached error log?

HDERR ST:1 EF:4 CL:58 CH:0 SN:C SC:2 SDH:29 DMACNT:FFFF DCRREG:91 MCRREG:8500
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=88. sc=12. hd=1. dr#=1. MCR2:0x2
HDERR ST:51 EF:10 CL:58 CH:0 SN:C SC:2 SDH:29 DMACNT:FFFF DCRREG:91 MCRREG:8300
WD2010 ST=/Sekg/Err/ EF=/Id?/ cy=88. sc=12. hd=1. dr#=1. MCR2:0x2
HDERR ST:1 EF:4 CL:DF CH:1 SN:0 SC:2 SDH:2A DMACNT:FFFF DCRREG:92 MCRREG:CD00
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=479. sc=0. hd=2. dr#=1. MCR2:0x2
drv:1 part:2 blk:25608 rpts:1
HDERR ST:1 EF:4 CL:57 CH:0 SN:4 SC:2 SDH:2F DMACNT:FFFF DCRREG:97 MCRREG:8500
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=87. sc=4. hd=7. dr#=1. MCR2:0x2
drv:1 part:2 blk:562 rpts:1
HDERR ST:1 EF:4 CL:D4 CH:1 SN:A SC:2 SDH:2C DMACNT:FFFF DCRREG:94 MCRREG:CF00
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=468. sc=10. hd=4. dr#=1. MCR2:0x2
drv:1 part:2 blk:24925 rpts:1
HDERR ST:1 EF:4 CL:36 CH:2 SN:4 SC:2 SDH:2D DMACNT:FFFF DCRREG:95 MCRREG:C700
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=566. sc=4. hd=5. dr#=1. MCR2:0x2
drv:1 part:2 blk:31202 rpts:1
HDERR ST:1 EF:4 CL:2 CH:0 SN:0 SC:2 SDH:2A DMACNT:FFFF DCRREG:92 MCRREG:8D00
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=2. sc=0. hd=2. dr#=1. MCR2:0x2
drv:1 part:1 blk:80 rpts:1
HDERR ST:1 EF:4 CL:1 CH:0 SN:4 SC:2 SDH:28 DMACNT:FFFF DCRREG:90 MCRREG:C500
WD2010 ST=/!Rdy/Err/ EF=/Abrt/ cy=1. sc=4. hd=0. dr#=1. MCR2:0x2
drv:1 part:1 blk:2 rpts:1

It seems that the keys are the ST=/!Rdy/Err/ and EF=/Abrt/ parts.
I suspect its telling me there was an error -- the request was
aborted due to the drive not being ready.  But why might that
happen?

My initial guess is a cable problem.  One of the connectors on
the 34-pin cable is a bit suspect.  And both cables may be on
the long side -- how sensitive are these guys to length and is
that likely to cause the problems I'm seeing?  Also, they are
of course running right next to all sorts of power cords and
other cables that one might find around the back of a machine,
which probably is not an electrically benign area.  How much
of a problem is noise likely to be?

Thanks for any help.  E-mail responses are fine, or post if it
seems to be of fairly general interest (like cable lengths).

-- 
Karl Swartz			 |UUCP	uunet!apple!zygot!ditka!kls
1-408/223-1308			 |INet	zygot!ditka!kls at apple.com
"I never let my schooling get in |BIX	kswartz
the way of my education."(Twain) |Snail	1738 Deer Creek Ct., San Jose CA 95148