shaddock@rti.UUCP (Mike Shaddock) (07/07/89)
We have a DILOG SQ703A tape controller with an Exabyte 8mm tape drive
(prom 4$22) attached to VAXstation II running Ultrix 3.1. Under Ultrix
2.2, the Exabyte worked perfectly, but since we upgraded to Ultrix 3.x
it has not worked very well. It understands commands like "mt -f
/dev/rmt1h rewind" or "mt -f /dev/rmt1h offline", but dd, tar, and dump
all fail in a moderately strange way. Tar will begin to write on the
tape, but then will come back with:
/dev/rmt1h: Error 0
tar: Archive 1 write error
Dd and dump also report "Error 0" and complain about write errors. Our
current kernel config file has
adapter uba0 at nexus ?
controller klesiu0 at uba0
controller uq1 at klesiu0 csr 0174500 vector uqintr
tape tms0 at uq1 drive 0
controller klesiu1 at uba0
controller uq2 at klesiu1 csr 0160404 vector uqintr
tape tms1 at uq2 drive 0
controller uda0 at uba0
controller uq0 at uda0 csr 0172150 vector uqintr
disk ra0 at uq0 drive 0
disk ra1 at uq0 drive 1
disk ra2 at uq0 drive 2
device qv0 at uba0 csr 0177200 flags 0x0f vector qvkint qvvint
device qe0 at uba0 csr 0174440 vector qeintr
device dz0 at uba0 csr 0160100 flags 0xff vector dzrint dzxint
in the relevant devices section.
Has anyone else out there seen this problem, and if so, do you have a
fix?
--
Mike Shaddock {decvax,seismo,ihnp4,philabs}!mcnc!rti!shaddock
shaddock@rti.rti.org
"You're in a twisty maze of sendmail rules, all obscure."don@edison.UUCP (Don Kossman) (07/08/89)
In article <3064@rti.UUCP> shaddock@rti.UUCP (Mike Shaddock) writes: >We have a DILOG SQ703A tape controller with an Exabyte 8mm tape drive >(prom 4$22) attached to VAXstation II running Ultrix 3.1. Under Ultrix >2.2, the Exabyte worked perfectly, but since we upgraded to Ultrix 3.x >it has not worked very well. It understands commands like "mt -f >/dev/rmt1h rewind" or "mt -f /dev/rmt1h offline", but dd, tar, and dump >all fail in a moderately strange way. Tar will begin to write on the >tape, but then will come back with: > > (error messages and config file deleted) > we've been using an exabyte 8mm drive with a controller from Contemporary Cybernetics (model Cy-8200-Q) on a MicroVAX-II under Ultrix 3.0 for several months. we did have some initial write errors with dump, reported these to the vendor, got a controller upgrade, and have had no problems since then. dump/restore work perfectly. we are getting about 10 megabytes per minute on our poor old MVII. combinations of tar and mt work reasonably well (have to use "mt fsf 1" when writing multiple tar archives to the non-rewind device, and sometimes the tape positioning gets messed up as the tape is unloaded/loaded). this is to be expected, perhaps (?) with 8mm technology. we're waiting for DAT, which will give us slightly lower speed but true random access (ie "tar r" should be possible). don kossman, sei information technology, los angeles ...sun!suntzu!seila!don