🚀 go-pugleaf

I'm having a problem with dump on one of the partitions on my DEC 5000/240
(Ultrix 4.3).  Our nightly dump intermittantly gets errors of the form
"iofail 12 43017;Disk write error on disk 1" on one particular parition.
It's apparently *not* the disk, though, but rather the tape device that's
erroring - uerf reports only:

	----- EVENT INFORMATION -----

	EVENT CLASS                             ERROR EVENT 
	OS EVENT TYPE                  103.     TAPE ERROR 
	SEQUENCE NUMBER                 63.
	OPERATING SYSTEM                        ULTRIX 32 
	OCCURRED/LOGGED ON                      Tue Aug  8 10:07:32 1995 EDT
	OCCURRED ON SYSTEM                      baker.dartmo 
	SYSTEM ID                 x82040230     HW REV: x30
						FW REV: x2
						CPU TYPE: R2000A/R3000 
	PROCESSOR TYPE                          KN03 

	----- UNIT INFORMATION -----

	UNIT CLASS                              SCSI TAPE 
	UNIT TYPE                               TZXX 
	CONTROLLER NO.                   0.
	UNIT NO.                         4.

I've had the drive replaced recently.  Changing tapes doesn't help (and the
drive is cleaned regularly).

It's occurred to me that there might be some file that gets touched (and
therefore backed up) every once and awhile, but I can't figure out why mere
bits in a file would do this.

What do the iofail numbers represent?  It's always "iofail XX 43017" - XX
is either 12 or 14.  Any ideas?

Thanks.

Pat Wilson
paw@dartmouth.edu