Recovering 4mm tar tapes
dj.taylor4 at comcast.net
Mon Sep 12 10:12:14 CDT 2016
I have a pair of 4mm DDS tapes from 1999 that I would like to recover.
I was able to read one with tar on a Debian (jessie) Linux system, but
the second gives an error.
The tape that I could read is a Sony with DDS markings and 4 bars next
to the DDS logo. It was written on an SGI computer. I was able to read
this with a simple tar -xvf /dev/st0 command.
The second tape is a 3M brand with DDS markings and 4 bars next to the
DDS logo. It also has 'Media Recognition System' and DD-90 written on
it. Here is the dialog and error:
root at T5400deb:/home/taylor/4mm_tar_1998# lsscsi
[0:0:4:0] disk codesrc SCSI2SD 4.2 /dev/sdc
[0:0:5:0] disk codesrc SCSI2SD 4.2 /dev/sdd
[0:0:6:0] tape ARCHIVE 4326XX 27871-XXX 0324 /dev/st0
[3:0:0:0] disk ATA WDC WD800JD-75MS 1E04 /dev/sda
[3:0:1:0] cd/dvd PLDS DVD+-RW DH-16A6S YD11 /dev/sr0
[4:0:0:0] disk ATA ST500DM002-1BD14 KC45 /dev/sdb
root at T5400deb:/home/taylor/4mm_tar_1998# mt -f /dev/st0 status
drive type = 114
drive status = 318767616
sense key error = 0
residue count = 0
file number = 0
block number = 0
root at T5400deb:/home/taylor/4mm_tar_1998# tar -xvf /dev/st0
tar: /dev/st0: Cannot read: Input/output error
tar: At beginning of tape, quitting now
tar: Error is not recoverable: exiting now
The tape drive is a Seagate CTD8000R-S with COMPAQ markings. There are 5
jumpers to configure the drive and one is for MRS which the jumper
config page I have says it is enabled (Default), however the pins are
missing for that option. What does that mean?
(None of the config jumpers were installed for the tape that I could
read) Is the 2nd tape just bad and can't be read? Or do I need a
slightly different tape drive?
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