tape drive - input/output error

[Eric Shibata]

Hello everyone, I am trying to get my scsi tape drive to work. Not matter 
what I do I get I/O errors.
for example:

mt -f /dev/st0 status
/dev/st0: Input/output error

mt -f /dev/nst0 status
/dev/nst0: Input/output error

when I run command without a tape in I get:
mt -f /dev/nst0 status

SCSI 2 tape drive:
File number=-1, block number=-1, partition=0.
Tape block size 0 bytes. Density code 0x0 (default).
Soft error count since last status=0
General status bits on (50000):
  DR_OPEN IM_REP_EN


-Tape drive: HP SureStore T4i

-Linux 2.6.9-1.667 i686 GNU/Linux

______________________________________________________________________________________
Command dmesg | grep scsi,  shows:
scsi: ***** BusLogic SCSI Driver Version 2.1.16 of 18 July 2002 *****
scsi: Copyright 1995-1998 by Leonard N. Zubkoff <lnz at dandelion.com>
scsi0: Configuring BusLogic Model BT-930 PCI Ultra SCSI Host Adapter
scsi0:   Firmware Version: 5.02, I/O Address: 0x2400, IRQ Channel: 11/Level
scsi0:   PCI Bus: 0, Device: 16, Address: 0x41300000, Host Adapter SCSI ID: 7
scsi0:   Parity Checking: Enabled, Extended Translation: Enabled
scsi0:   Synchronous Negotiation: Fast, Wide Negotiation: Disabled
scsi0:   Disconnect/Reconnect: Enabled, Tagged Queuing: Enabled
scsi0:   Driver Queue Depth: 255, Scatter/Gather Limit: 128 segments
scsi0:   Tagged Queue Depth: Automatic, Untagged Queue Depth: 3
scsi0:   SCSI Bus Termination: Enabled, SCAM: Disabled
scsi0: *** BusLogic BT-930 Initialized Successfully ***
scsi0 : BusLogic BT-930
Attached scsi tape st0 at scsi0, channel 0, id 4, lun 0
------------------------------------------------------------------------------------Command 
lsmod, reveals:
Module                  Size  Used by
parport_pc             24705  1
lp                     11565  0
parport                41737  2 parport_pc,lp
autofs4                24005  0
i2c_dev                10433  0
i2c_core               22081  1 i2c_dev
sunrpc                160421  1
md5                     4033  1
ipv6                  232577  12
uhci_hcd               31449  0
e100                   39364  0
mii                     4673  1 e100
floppy                 58609  0
st                     34781  0
BusLogic               71645  0
scsi_mod              118417  2 st,BusLogic
dm_snapshot            17029  0
dm_zero                 2369  0
dm_mirror              23341  2
ext3                  116809  2
jbd                    74969  1 ext3
dm_mod                 54741  6 dm_snapshot,dm_zero,dm_mirror
--------------------------------------------------------------------------------
/proc/scsi/scsi:

Attached devices:
Host: scsi0 Channel: 00 Id: 04 Lun: 00
   Vendor: HP       Model: T4000s           Rev: 1.07
   Type:   Sequential-Access                ANSI SCSI revision: 02

--------------------------------------------------------------------------------


If you need any more info, please let me know.
Any ideas greatly appreciated.ERS 
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