Tru64 and DAT Tape problems

From: Burch Seymour RTPS <bseymour_at_ns.encore.com>
Date: Tue, 24 Aug 1999 11:06:04 -0400 (EDT)

I'm attempting to port software which worked on DU 4.0 <nothing> to
4.0E. It's not working too well.. For starters I get these messages
on the console:

ITPSA0: DIP intr, istat = 0x9, dstat = 0x81
ITPSA0: illegal instruction - DSP = 0x10603b0, DCMD = 0xf1
ITPSA0: HTH intr. on bus 0, SBCL = 0xa3
ITPSA0: HTH intr. on bus 0, SBCL = 0x26

They don't mean anything to me... Anyone????

Sometimes I find the device just goes away.

XXX> mt rew

Error on device named /dev/nrmt0h - Place TLZ10 tape drive unit #0 ONLINE

XXX> mt stat

DEVIOGET ELEMENT CONTENTS
---------------- --------
category DEV_TAPE
bus DEV_SCSI
interface SCSI
device TLZ10
adpt_num 0
nexus_num 0
bus_num 0
ctlr_num 0
slave_num 0
dev_name tz
unit_num 0
soft_count 0
hard_count 18
stat 0x5
                        DEV_BOM DEV_OFFLINE
category_stat 0x20000
                        DEV_61000_BPI
XXX> mt online
/dev/nrmt0h online 1 failed: I/O error

I seem to need to restart (at a minimum) to get the tape drive back.
I have had cases where it was so confused that a console >>> show dev
did not see it and a power cycle of the box was required.

I'm using the ioctl interface as define in man mtio(7) to control tape
movement.

I have on occasion, had kernel panics from this, though I've not been
able to extract a useful test case yet.

I've installed all patches that seem to relate to the kernel or I/O
subsystems.

Thanks for any suggestions or pointers to more information.


-- 
This message from,		Encore Real Time Computing, Inc.
Burch Seymour                   1700 NW 66th Ave. Suite 103
Senior Software Engineer	Fort Lauderdale, Fl 33313 
email: bseymour_at_encore.com      Vox: (954)377-1128   Fax: (954)377-1140
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Received on Tue Aug 24 1999 - 15:03:14 NZST

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