Fedora 15 +scsi
 

I had an older box which I was using as the site backup machine. A
friend gave me a HP DAT72 drive and I got it up and working on the
Fedora 11 OS. I did backups and tested everything. The tape drive
was accessed as /dev/st4. This box ran Samba and users copied their
files to the this machine. I did backups using:

tar cvf /dev/st4 /home/<user> /home/<user>



Then I decided to upgrade. I swapped out the motherboard and got a
64 bit cpu and upgraded the OS (complete new install). I now have
Fedora 15 running on the box.



The tape drive has been visible as /dev/st4 occasionally. And when
it is I have used it to make a small backup and test the restore.
But the /dev/st4 is not always visible and the file /dev/st4 usually
disappears upon reboot. I don't know what I did to make it appear
(if anything).



It almost looks like the device changed from /dev/st4 to /dev/st0.
Is that possible?



Some more info:

#ls /dev/st*

/dev/st0* /dev/st0a* /dev/st0l* /dev/st0m* /dev/stderr*
/dev/stdin* /dev/stdout

#lsscsi

[0:0:0:0]*** cd/dvd* PIONEER* DVD-RW* DVR-106D 1.08* /dev/sr0

[2:0:0:0]*** disk*** ATA***** WDC WD2500JS-60M 10.0* /dev/sda

[2:0:1:0]*** disk*** ATA***** ST2000DL003-9VT1 CC32* /dev/sdb

[3:0:0:0]*** disk*** ATA***** ST2000DL003-9VT1 CC32* /dev/sdc

[3:0:1:0]*** disk*** ATA***** ST2000DL003-9VT1 CC32* /dev/sdd

[4:0:4:0]*** tape*** HP****** C7438A********** V312* /dev/st0

# dmesg |grep tape

[** 25.211496] st 4:0:4:0: Attached scsi tape st0

#cat /proc/scsi/scsi

Attached devices:

Host: scsi0 Channel: 00 Id: 00 Lun: 00

* Vendor: PIONEER* Model: DVD-RW* DVR-106D Rev: 1.08

* Type:** CD-ROM************************** ANSI* SCSI revision: 05

Host: scsi2 Channel: 00 Id: 00 Lun: 00

* Vendor: ATA***** Model: WDC WD2500JS-60M Rev: 10.0

* Type:** Direct-Access******************* ANSI* SCSI revision: 05

Host: scsi2 Channel: 00 Id: 01 Lun: 00

* Vendor: ATA***** Model: ST2000DL003-9VT1 Rev: CC32

* Type:** Direct-Access******************* ANSI* SCSI revision: 05

Host: scsi3 Channel: 00 Id: 00 Lun: 00

* Vendor: ATA***** Model: ST2000DL003-9VT1 Rev: CC32

* Type:** Direct-Access******************* ANSI* SCSI revision: 05

Host: scsi3 Channel: 00 Id: 01 Lun: 00

* Vendor: ATA***** Model: ST2000DL003-9VT1 Rev: CC32

* Type:** Direct-Access******************* ANSI* SCSI revision: 05

Host: scsi4 Channel: 00 Id: 04 Lun: 00

* Vendor: HP****** Model: C7438A********** Rev: V312

* Type:** Sequential-Access*************** ANSI* SCSI revision: 03

#tar cvf /dev/st4 /root

tar: /dev/st4: Cannot open: No such device or address

tar: Error is not recoverable: exiting now

#tar cvf /dev/st0 /root

*** <does nothing* - just times out after a few minutes with
the following message>

tar: /dev/st0: Cannot open: Input/output error

tar: Error is not recoverable: exiting now

#./rescan-scsi-bus.sh

Host adapter 4 (aic7xxx) found.

./rescan-scsi-bus.sh: line 31: [: too many arguments

Host adapter * (device_info) found.

Scanning hosts* 4 * channels 0 for

*SCSI target IDs* 0 1 2 3 4 5 6 7 , LUNs* 0

Scanning for device 4 0 4 0 ...

OLD: Host: scsi4 Channel: 00 Id: 04 Lun: 00

***** Vendor: HP****** Model: C7438A********** Rev: V312

***** Type:** Sequential-Access*************** ANSI* SCSI
revision: 03

0 new device(s) found.************** d.txt 0 7 0 ...

0 device(s) removed.***

#MAKEDEV /dev/st4

# ls /dev/st*

/dev/st0** /dev/st0l* /dev/st4** /dev/st4l* /dev/stderr*
/dev/stdout

/dev/st0a* /dev/st0m* /dev/st4a* /dev/st4m* /dev/stdin

#tar cvf /dev/st4 /root

tar: /dev/st4: Cannot open: No such device or address

tar: Error is not recoverable: exiting now

# mt -f /dev/st4 status

/dev/st4: No such device or address

#tar cvf /dev/st0 /root

tar: /dev/st0: Cannot open: Input/output error

tar: Error is not recoverable: exiting now

# mt -f /dev/st0 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 (10000):

*IM_REP_EN

#<Reboot>

ls /dev/st*

/dev/st0* /dev/st0a* /dev/st0l* /dev/st0m* /dev/stderr*
/dev/stdin* /dev/stdout





Does anybody have a clue? Is there some command that I am missing?
What can I do? Thanks for any help!

Bill





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