some error in syslog and other logs ,i want to know the reason

[lin.chen]

there are several HP 9000 servers such as L3000 and a tape library STKT9940B in the SAN network,these server can share the tape library.
i found many errors in syslog,such like following,and i also found it in even.log and dmesg.but ,we did not do any thing in SAN network,and i really can operate my system as usual,never interrupt!
i want to know why so many errors are in syslog,do these errors will impact my system?

Aug 25 14:07:23 saturn vmunix: 0/8/0/0: Unable to access previously accessed device at nport ID 0x11700.
Aug 25 14:12:36 saturn above message repeats 3 times
Aug 25 14:12:38 saturn vmunix: 0/12/0/0: Unable to access previously accessed device at nport ID 0x21700.
Aug 25 14:16:50 saturn vmunix: 0/8/0/0: Unable to access previously accessed device at nport ID 0x13700.
Aug 25 14:21:02 saturn vmunix: 0/8/0/0: Unable to access previously accessed device at nport ID 0x12700.
Aug 25 14:25:15 saturn vmunix: 0/12/0/0: Unable to access previously accessed device at nport ID 0x23700.
Aug 25 14:15:47 saturn vmunix: 0/12/0/0: Unable to access previously accessed device at nport ID 0x21700.


in event.log
Component Data:
Physical Device Path....: 0/8/0/0.1.58.255.0.0.0
Inquiry Vendor ID.......: STK
Inquiry Product ID......: T9940B
Firmware Version........: 1.34
Serial Number...........: 479000019139

Product/Device Data:

Logger ID.........: stape
Product Identifier: SCSI Tape
Product Qualifier.: STKT9940B
SCSI Target ID....: (not available/applicable)
SCSI LUN..........: (not available/applicable)

I/O Log Event Data:

Driver Status Code..................: 0x00000005
Length of Logged Hardware Status....: 4 bytes.
Offset to Logged Manager Information: 8 bytes.
Length of Logged Manager Information: 30 bytes.

Hardware Status:

Raw H/W Status:
0x0000: 00 00 00 00

SCSI Status...: GOOD (0x00)
Indicates that the target has successfully completed the command.

SCSI Sense Data: (not present in log record)

SCSI Command Data Block: (not present in log record)

Manager-Specific Information:

Raw Manager Data:
0x0000: 2D 7F 67 C7 00 04 00 00 00 00 04 00 00 00 00 00
0x0010: 2D 00 00 00 FE 00 00 06 0A 00 04 00 00 00

found in dmesg
0/12/0/0: Unable to access previously accessed device at nport ID 0x23700.
0/12/0/0: Unable to access previously accessed device at nport ID 0x22700.
0/12/0/0: Unable to access previously accessed device at nport ID 0x22700.
0/12/0/0: Unable to access previously accessed device at nport ID 0x22700.
0/12/0/0: Unable to access previously accessed device at nport ID 0x22700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x10700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x10700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x10700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x10700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x11700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x11700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x11700.
0/8/0/0: Unable to access previously accessed device at nport ID 0x11700.

[Kofi ARTHIABAH]

Hello lin.chen


Check out this thread:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1041341

[Sandman!]

Looks like something changed on the SAN side so that the previous devices cannot be seen or they have been assigned new nportIDs. Could you post the output of the following commands:

# ioscan -funC fc
# ioscan -funC fcp
# ioscan -funC ext_bus

thanks!