[KLUG Members] Tape Changer (Compaq TSL-10000)

[Adam Tauno WIlliams]

I have a Compaq TSL-10000 tape changer/autoloader as Id 4 on the 4th
SCSI bus of an IBM x335.  It shows as OK using tapeinfo...

moa:~ # tapeinfo -f /dev/sg14
Product Type: Tape Drive
Vendor ID: 'COMPAQ  '
Product ID: 'TSL-10000       '
Revision: '5.02'
Attached Changer: Yes
SerialNumber: '0010201179'
MinBlock:1
MaxBlock:16777215
SCSI ID: 4
SCSI LUN: 0
Ready: no

The corresponding st device ....

Host: scsi3 Channel: 00 Id: 04 Lun: 00
  Vendor: COMPAQ   Model: TSL-10000        Rev: 5.02
  Type:   Sequential-Access                ANSI SCSI revision: 02
Host: scsi3 Channel: 00 Id: 04 Lun: 01
  Vendor: COMPAQ   Model: TSL-10000        Rev: 5.02
  Type:   Medium Changer                   ANSI SCSI revision: 02
st: Version 20040318, fixed bufsize 32768, s/g segs 256
Attached scsi tape st0 at scsi3, channel 0, id 4, lun 0

.... works great if I manually select the tape in the cartridge I wish
to use via the operator panel on the front of the device (but thats down
the hall behind two locked doors).

So I'm trying to use the mtx command to control the loading a tape from
the magazine,  but I'm not having much luck...

moa:/proc/scsi # mtx -f /dev/sg14 eepos transfer 1 3 eepos equires
argument between 0 and 3.
moa:/proc/scsi # mtx -f /dev/sg14 load 3
mtx: Request Sense: Long Report=yes
mtx: Request Sense: Valid Residual=no
mtx: Request Sense: Error Code=70 (Current)
mtx: Request Sense: Sense Key=Illegal Request
mtx: Request Sense: FileMark=no
mtx: Request Sense: EOM=no
mtx: Request Sense: ILI=no
mtx: Request Sense: Additional Sense Code = 20
mtx: Request Sense: Additional Sense Qualifier = 00
mtx: Request Sense: Field in Error = 07
mtx: Request Sense: BPV=yes
mtx: Request Sense: Error in CDB=yes
mtx: Request Sense: SKSV=yes
mtx: Request Sense: Field Pointer = 00 00
READ ELEMENT STATUS Command Failed

Anyone know the correct syntax or trick for driving an autoloader?