> I recently installed a SCSI disk drive with SCSI ID=5
> and device name /dev/rdsk/c201d5s0 under HPUX 9.05.
> I saw the following message from dmesg, but wasn't sure if it
> was telling me there was a problem with my drive or something else.
> Can anyone interpret this for me?
> % dmesg
Well, here's what I can tell you:
Quote:> SCSI: dev: 7201200
HP driver device node information
Quote:> cdb: 28 00 00 00 00 04 00 00 01 00
0: 28 -> Group 1 (10 byte) Read Command
1: 00 -> Logical unit number (LUN) 0 & flags
2-5: 00000004 -> Logical Block Address (LBA)
6: 00 -> Reserved
7-8: 0001 -> Transfer length in blocks
9: 00 -> Control Flags
Quote:> opcode: (28) Read (10)
The SCSI controller issued a Group 1 Read command
Quote:> status: (02) Check Condition
The disk returned a check condition (error) status.
A Group 1 Read only returns Check Condition on the following
Illegal Request (Bad Logical Block Address)
Unit Attention (Removeable media has changed)
Medium Error (Unrecoverable read error)
Aborted Command (Error that may be resolved by repeating command)
Quote:> request sense status: (00) Good
The SCSI controller succesfully requested and received Sense Data
(error information) from the drive
Quote:> sense data: f0 00 03 00 00 00 04 0a 00 00 00 00 15 00 00 00
> 00 00
0: f0 -> Valid error, Class 7 (extended) sense data,
error code 0
1: 00 -> Segment number (meaningless for Read commands)
2: 03 -> Sense key 3 (Medium Error)
3-6: 00000004-> LBA of failed read
7: 0a -> Length of extended sense data in bytes
c: 15 -> Additional Sense Code 15 - Positioning Error
d: 00 -> ASC Qualifier 00 - Random Positioning Error
(vs 01 - Mechanical Positioning error
or 02 - Position Error detected by read of media)
Quote:> error code: (70) Current Error
> sense key: (03) Medium Error
> additional sense code: (15)
> additional sense code qualifier: (00)
> Random Positioning Error
> info (lba): 4
Reiteration of the above
In summary, your disk tried to position to a particular block,
gave up when it couldn't and told the SCSI driver about it.
The SCSI driver recorded the error and moved on.
If the error occurrs infrequently, don't worry too much about it.
If you have a disk utiliy, you may want to read exercise the disk
at LBA 4.
If the error occurrs regularly, suspect a failing SCSI drive.