SUMMARY: Problem with Exabyte EXB-8200 8mm tape drive

From: Jim Ahokas (next8!genki!
Date: Mon Jun 01 1992 - 22:54:49 CDT

Here is a summary of my problem with an Exabyte EXB-8200 8mm tape

All who responded pointed out that the, /dev/tty fails, error was due
to there was no tty to write to as the procedure was started via

Some indicated that I was out of tape which was not true.

The bottom line:

It was a hardware problem and or Sun service replaced the faulty

My original question:

> I am experiencing a problem with one of our systems doing multiple
dumps to an Exabyte.


> Sun 4/470 running 4.1.1, 128 Meg of Ram 256 meg of swap.

> Server backs up itself and various Sparc2 hosts Using the following
dump parameters

> /etc/rdump 0ufs sunset:/dev/nrst0 1200000 /Filesystem

> I have the exact same script running every night on a different
server with no problems, in fact, this script has been running on the
troubled server for at least 6 months with no problems until

> Here is the error I am receiving:

> Exabyte EXB-8200 8mm tape drive:
> sense key(0x0)= no sense residual= 0 retries= 0
> file no= 0 block no= 0
> backup_all_files: Backing up sunset:/usr/dist2 FILE NUMBER 3
> DUMP: Date of this level 0 dump: Sat May 30 01:03:05 1992
> DUMP: Date of last level 0 dump: the epoch
> DUMP: Dumping /dev/rid002a (/usr/dist2) to /dev/nrst0 on host
> DUMP: mapping (Pass I) [regular files]
> DUMP: mapping (Pass II) [directories]
> DUMP: estimated 1449820 blocks (707.92MB) on 0.04 tape(s).
> DUMP: /dev/nrst0: I/O error

> DUMP: fopen on /dev/tty fails
> DUMP: The ENTIRE dump is aborted.

> The system does Dump the first, second and third file system with
no problem and then gives the above error on the fourth as well as
all the rest including the remote hosts.

> When I then do a rewind or a status I get the following error

> /dev/nrst0: no tape loaded or drive offline

> I am not out of tape, the error has happened on any and every tape
I use. I believe the error "DUMP: fopen on /dev/tty fails" may be the
key, however I am not really sure what this implies.

>Is it a hardware problem, I have rebooted which has not helped.

Thanks to the following who responded:

Brett Chapman
Brett Lymn

Jim Ahokas
CS First Boston (Japan) Limited
Yurakucho Denki Building
7-1 Yurakucho 1-chome, Chiyoda-ku
Tokyo 100, Japan

DOMAIN: UUCP: nobugs!next8! VOICE: (03)-3213-8854 FAX: (03)-3213-8870

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