kmcvay@oneb.wimsey.bc.ca (Ken McVay) (05/14/91)
I'm seeing some strange problems with an old NEC 5126 (615 cyl/4 heads)
disk which was recently reformatted with a 16-bit 1:1 controller after
a motherboard swap.
The drive is set up as a type 2 - type 6 might also work - type two's
WPC is 300, while type 6's WPC is FFFF. Does anyone have the correct
data for the 5126?
The disk sometimes boots flawlessly, and can be run through hoops for
long periods of time (Spinrite, etc) without error, but then may
crash without explanation... then rebooting produces a drive error
and the drive isn't recognized as being there.
At first I suspected heat-inspired chip damage to the disk electronics,
as I've seen it happen before, but that explaination fails when the disk
does boot, and works for hours under test.
The controller was installed new, and tests ok (Disk Mgr & Spinrite
both pass the controller and controller RAM), so it's probably ok.
No evidence of viral infection can be found (SCAN 77). The system is
running DR DOS 5.0, and was set up with FASTOPEN & cache. We've disabled
FASTOPEN to see if it was causing a problem...
Any info on the disk specs would be useful, so I can make certain the
disk type is correctly assigned, and eliminate that as a potential
source of the problem...
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