problem with scsi tape
In April, I migrated our servers to debian 3.0, kernel 2.4.18. One of them
has an external Ultrium-1 LTO tape drive attached. After I got back from
the data center, I realized that I had turned on the tape drive after I
rebooted the server, so I used the "scsi add-single-device" command.
Everything seemed to work fine until June 18. I started getting the
following in my kernel log:
Jun 18 01:34:07 home kernel: scsi1: Someone reset channel A
Jun 18 01:34:23 home kernel: scsi1: Transceiver State Has Changed to SE
mode
Jun 18 01:34:24 home kernel: scsi1: Transceiver State Has Changed to LVD
mode
The "transceiver state" messages repeat, but the tape was still working.
Then the tape filled up (at least I think it did.) The rewind command got
stuck in an uninterruptible sleep state, so I can't kill it. Cycling the
tape drive didn't help. Because of this, the tape backup is inaccessible.
I know I'm going to have to reboot, but I don't like it. If anyone knows
what is going on, maybe I could prevent it from happening again.
I'll include the /proc/scsi/scsi and /proc/scsi/aic7xxx, in case they can
provide a clue.
Thanks,
Pete
---------------------------
home:/var/log# cat /proc/scsi/scsi
Attached devices:
Host: scsi1 Channel: 00 Id: 06 Lun: 00
Vendor: HP Model: Ultrium 1-SCSI Rev: E16V
Type: Sequential-Access ANSI SCSI revision: 03
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: Model: Rev:
Type: <NULL> ANSI SCSI revision: ffffffff
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: SEAGATE Model: ST318406LC Rev: 8A03
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 06 Lun: 00
Vendor: DELL Model: 1x4 U2W SCSI BP Rev: 1.30
Type: Processor ANSI SCSI revision: 02
Host: scsi4 Channel: 00 Id: 15 Lun: 00
Vendor: Dell Model: 12 BAY U2W CU Rev: 0209
Type: Processor ANSI SCSI revision: 03
Host: scsi4 Channel: 01 Id: 15 Lun: 00
Vendor: Dell Model: 12 BAY U2W CU Rev: 0209
Type: Processor ANSI SCSI revision: 03
Host: scsi4 Channel: 02 Id: 00 Lun: 00
Vendor: MegaRAID Model: LD 0 RAID5 104G Rev: 1.92
Type: Direct-Access ANSI SCSI revision: 02
home:/var/log# cat /proc/scsi/aic7xxx/1
Adaptec AIC7xxx driver version: 6.2.4
aic7899: Ultra160 Wide Channel B, SCSI Id=7, 32/253 SCBs
Channel A Target 0 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 1 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 2 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 3 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 4 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 5 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 6 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Goal: 80.000MB/s transfers (40.000MHz, offset 15, 16bit)
Curr: 3.300MB/s transfers
Channel A Target 6 Lun 0 Settings
Commands Queued 493140
Commands Active 0
Command Openings 1
Max Tagged Openings 0
Device Queue Frozen Count 0
Channel A Target 7 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 8 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 9 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 10 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 11 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 12 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 13 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 14 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
Channel A Target 15 Negotiation Settings
User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
--
Peter A. Dumpert
Innovative Computer Services LLC - web design/e-pubs/consulting
Innovative BusinessNet - an ISP for Business
www.innovativebusiness.net
Phone: 732-683-0092 ext 102 Fax: 732-577-9390
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