Recovering 4mm tar tapes

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? Doug