Exabyte 8500 problems? (SUMMARY)

2007-12-25 8:19:00

My original posting:

>Configuration: Sun SPARCstation 10/30

> 32 Mb memory, 150 Mb swap

> Exabyte EXB-8500 8mm Helical Scan (/dev/rst0)

> SunOS 4.1.3

> Using cron, I run nightly backups (combination of full and incremental

>dumps) of the HP C3010-002 SCSI disks on this machine onto the locally attached

>8mm tape drive. Two of the scripts that dump between 4-5 Gb of data fail at a

>point ~2 Gb into the script with the error:

> DUMP: Tape write error 0 feet into tape 1

> DUMP: fopen on /dev/tty fails

> DUMP: The ENTIRE dump is aborted.

> This happens with new (out-of the-box) tapes and previously used (dumps written

>on our old EXB-8200 tape drive). Is there some initialization process (hardware or

>software) that needs to be done, allowing me to write up to 5Gb onto these tapes?

>The following command is used within the backup script:

> /etc/dump 0unbsdf 126 13000 54000 /dev/nrst0 <filesystem>

> Any help/advice that you can provide is appreciated!

My thanks go out to the following people who pointed out I was incorrectly

specifying the low-density tape device (/dev/nrst0) and not the high-density

tape device (/dev/nrst8):

Doug Greenwald (fsgreen@icomp01.lerc.nasa.gov) - suggested tape head cleaning

Leonard Mills (len@contec.com)

_____________________________________

Roger T. Moises - UNIX System Manager

Lockheed Missiles & Space Co., Inc. Palo Alto, CA

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