Unexpected Disconnect -- lbolt: 115335877 errors - whats the problem ????

[seanh]

Hi all,

I have just noticed the following errors in my syslog..........

May 1 01:05:19 sul7it11 vmunix: SCSI: Unexpected Disconnect -- lbolt: 115335877, dev: cb046102, io_id: 4b84e6b
May 1 01:09:54 sul7it11 vmunix: I/O hardware probe timed out at path 0/4/0/0.7
May 1 01:15:21 sul7it11 vmunix: SCSI: Request Timeout; Abort -- lbolt: 115396072, dev: cd046040, io_id: 4b84e6a
May 1 01:15:21 sul7it11 vmunix: SCSI: Unexpected Disconnect -- lbolt: 115396081, dev: cb046502, io_id: 4b85dbe
May 1 01:25:23 sul7it11 vmunix: SCSI: Request Timeout; Abort -- lbolt: 115456272, dev: cd046040, io_id: 4b85dbd
May 1 01:25:23 sul7it11 vmunix: SCSI TAPE: dev = 0xcd046040 I/O error during close

Can anyone shed any light as to what the problem may be please ???

I can run an ioscan no problem........here is the results :

# ioscan -fn
Class I H/W Path Driver S/W State H/W Type Description
============================================================================
root 0 root CLAIMED BUS_NEXUS
ioa 0 0 sba CLAIMED BUS_NEXUS System Bus Adapter (582)
ba 0 0/0 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
lan 0 0/0/0/0 btlan3 CLAIMED INTERFACE HP PCI 10/100Base-TX Core
/dev/diag/lan0 /dev/ether0
ext_bus 0 0/0/1/0 c720 CLAIMED INTERFACE SCSI C896 Ultra Wide LVD
target 0 0/0/1/0.7 tgt CLAIMED DEVICE
ctl 0 0/0/1/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c0t7d0
target 1 0/0/1/0.8 tgt CLAIMED DEVICE
disk 0 0/0/1/0.8.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c0t8d0 /dev/rdsk/c0t8d0
target 2 0/0/1/0.9 tgt CLAIMED DEVICE
disk 1 0/0/1/0.9.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c0t9d0 /dev/rdsk/c0t9d0
target 3 0/0/1/0.10 tgt CLAIMED DEVICE
disk 2 0/0/1/0.10.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c0t10d0 /dev/rdsk/c0t10d0
target 4 0/0/1/0.11 tgt CLAIMED DEVICE
disk 3 0/0/1/0.11.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c0t11d0 /dev/rdsk/c0t11d0
target 5 0/0/1/0.14 tgt CLAIMED DEVICE
ctl 1 0/0/1/0.14.0 sctl CLAIMED DEVICE HP A5272A
/dev/rscsi/c0t14d0
ext_bus 1 0/0/1/1 c720 CLAIMED INTERFACE SCSI C896 Ultra Wide Single-Ended
target 6 0/0/1/1.2 tgt CLAIMED DEVICE
disk 4 0/0/1/1.2.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c1t2d0 /dev/rdsk/c1t2d0
target 7 0/0/1/1.7 tgt CLAIMED DEVICE
ctl 2 0/0/1/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c1t7d0
ext_bus 2 0/0/2/0 c720 CLAIMED INTERFACE SCSI C875 Ultra Wide Single-Ended
target 8 0/0/2/0.7 tgt CLAIMED DEVICE
ctl 3 0/0/2/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c2t7d0
ext_bus 3 0/0/2/1 c720 CLAIMED INTERFACE SCSI C875 Ultra Wide Single-Ended
target 9 0/0/2/1.2 tgt CLAIMED DEVICE
disk 5 0/0/2/1.2.0 sdisk CLAIMED DEVICE HP DVD-ROM 304
/dev/dsk/c3t2d0 /dev/rdsk/c3t2d0
target 10 0/0/2/1.7 tgt CLAIMED DEVICE
ctl 4 0/0/2/1.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c3t7d0
tty 0 0/0/4/0 asio0 CLAIMED INTERFACE PCI Serial (103c1048)
/dev/GSPdiag1 /dev/mux0 /dev/tty0p0 /dev/tty0p2
/dev/diag/mux0 /dev/tele0 /dev/tty0p1
tty 1 0/0/5/0 asio0 CLAIMED INTERFACE PCI Serial (103c1048)
/dev/GSPdiag2 /dev/diag/mux1 /dev/mux1 /dev/tty1p1
ba 1 0/1 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 2 0/2 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 3 0/3 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 4 0/4 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ext_bus 4 0/4/0/0 c720 CLAIMED INTERFACE SCSI C895 Ultra2 Wide Single-Ended
target 11 0/4/0/0.6 tgt CLAIMED DEVICE
tape 0 0/4/0/0.6.0 stape CLAIMED DEVICE HP C1537A
/dev/rmt/0m /dev/rmt/c4t6d0BEST /dev/rmt/c4t6d0DDS
/dev/rmt/0mb /dev/rmt/c4t6d0BESTb /dev/rmt/c4t6d0DDSb
/dev/rmt/0mn /dev/rmt/c4t6d0BESTn /dev/rmt/c4t6d0DDSn
/dev/rmt/0mnb /dev/rmt/c4t6d0BESTnb /dev/rmt/c4t6d0DDSnb
target 12 0/4/0/0.7 tgt CLAIMED DEVICE
ctl 5 0/4/0/0.7.0 sctl CLAIMED DEVICE Initiator
/dev/rscsi/c4t7d0
target 13 0/4/0/0.8 tgt CLAIMED DEVICE
disk 6 0/4/0/0.8.0 sdisk CLAIMED DEVICE SEAGATE ST318203LC
/dev/dsk/c4t8d0 /dev/rdsk/c4t8d0
target 14 0/4/0/0.9 tgt CLAIMED DEVICE
disk 7 0/4/0/0.9.0 sdisk CLAIMED DEVICE SEAGATE ST118202LC
/dev/dsk/c4t9d0 /dev/rdsk/c4t9d0
target 15 0/4/0/0.10 tgt CLAIMED DEVICE
disk 8 0/4/0/0.10.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c4t10d0 /dev/rdsk/c4t10d0
target 16 0/4/0/0.11 tgt CLAIMED DEVICE
disk 9 0/4/0/0.11.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c4t11d0 /dev/rdsk/c4t11d0
target 17 0/4/0/0.12 tgt CLAIMED DEVICE
disk 10 0/4/0/0.12.0 sdisk CLAIMED DEVICE SEAGATE ST318404LC
/dev/dsk/c4t12d0 /dev/rdsk/c4t12d0
target 18 0/4/0/0.14 tgt CLAIMED DEVICE
ctl 6 0/4/0/0.14.0 sctl CLAIMED DEVICE HP A5272A
/dev/rscsi/c4t14d0
ba 5 0/5 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 6 0/6 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
ba 7 0/7 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
lan 1 0/7/0/0 btlan5 CLAIMED INTERFACE HP A5230A/B5509BA PCI 10/100Base-TX Addon
/dev/diag/lan1 /dev/ether1 /dev/lan1
memory 0 8 memory CLAIMED MEMORY Memory
processor 0 160 processor CLAIMED PROCESSOR Processor
processor 1 162 processor CLAIMED PROCESSOR Processor
processor 2 166 processor CLAIMED PROCESSOR Processor


Many thanks guys and gals,

Sean H

[Warren_9]

Hi,

there is some problem on the tape device.

any power reset on the tape device?

GOOD LUCK!!

[MarkSyder]

The device with the error (tape drive) shows as claimed, which suggests that the fault has rectified itself.

Have you done any backups since the time of the error message?

Mark Syder (like the drink but spelt different)

[seanh]

Hi there Mark,

I will get a temporary tape loaded and try a few TARs etc.

But, i suspected the tape at first (due to the contents of the error !) but the ioscan shows the following........

tape 0 0/4/0/0.6.0 stape CLAIMED DEVICE HP C1537A
/dev/rmt/0m /dev/rmt/c4t6d0BEST /dev/rmt/c4t6d0DDS
/dev/rmt/0mb /dev/rmt/c4t6d0BESTb /dev/rmt/c4t6d0DDSb
/dev/rmt/0mn /dev/rmt/c4t6d0BESTn /dev/rmt/c4t6d0DDSn
/dev/rmt/0mnb /dev/rmt/c4t6d0BESTnb /dev/rmt/c4t6d0DDSnb
target 12 0/4/0/0.7 tgt CLAIMED DEVICE


Isnt the tape on 0/4/0/0.6.0 and something else on 0/4/0/0.7 or am i misunderstanding the reason why "I/O hardware probe timed out at path 0/4/0/0.7 " appears in the message ????

Sean

[Senthil Kumar .A_1]

Hi Sean,

If we analyze the DEV: number in lbolt message, all points to path 0/4/0/0.6.0, By seeing your ioscan output, I can guess that you have connected your HP tape library with HP C1537A as your DAT drive to this server.

This just signifies that there is a problem with the tape drive connections internal to the tape library. Please check the below link to troubleshoot the error further.

http://fritz.potsdam.edu/man/serverhw/hp/tapelibrary-config.pdf

Nothing to worry about, since it just your tape library that needs to be fixed. Be happy that these lbolt errors are not for your root disk :).

Regards,
Senthil Kumar .A

[MarkSyder]

Device 7 is always the SCSI initiator. If this is timing out I would be inclined to suspect a fault on the SCSI board rather than the tape drive. Try a few test reads/writes as you suggested you would do. If they work, keep an eye on it. If they fail, I would suggest a call to HP.

Mark

[seanh]

Hi guys,

Once again thanks for your input.

I have just inserted a brand new DDS3 tape and threw 13000 files at the drive and restored them with no problem at all so i assuming this is a 'glitch' ?

I will keep my eye on it a bit closer than usual.......a dodgy tape perhaps ???

[Ajitkumar Rane]

Hello Sean,

There nothing to much to worry about, In our environment we keep getting such errors often.

The error is related to the Tape drive as seen in your message

An I/O error occurred while reading from or
writing to the tape.


do a ll /dev/rmt | grep 0xcd046040
should give you the device that caused this message.

Was a backup/tape handeling activity done at that time.

Read the man page for close and that can shed some light on understanding the error.


Goodluck

Ajit

[seanh]

....not a backup exactly.

Its a script called cfg2html which analyzes all types of information from your system, and produces a nice and easy html file.

Well worth a look at -

http://come.to/cfg2html