Hi,
Since kernel version 2.6.1something, sd.c:sd_sync_cache spews out warnings
like
FAILED
status = 1, message = 00, host = 0, driver = 08
<6>sd: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
for an external RAID that used to work fine for the last ~6 years.
The device reports the following:
scsiinfo -i /dev/sdc
Inquiry command
---------------
Relative Address 0
Wide bus 32 0
Wide bus 16 1
Synchronous neg. 1
Linked Commands 0
Command Queueing 1
SftRe 0
Device Type 0
Peripheral Qualifier 0
Removable? 0
Device Type Modifier 0
ISO Version 0
ECMA Version 0
ANSI Version 2
AENC 0
TrmIOP 1
Response Data Format 2
Vendor: Arena
Product:
Revision level: P
I'm not quite sure how to get a report on the commands supported by
the device without digging into the kernel.
Now, as I read this, what fails is the request to write out any disk
internal caches, and unless power fails for the raid, I probably do
not need to worry. Still, comparing 2.6.10's sd_sync_cache and
2.6.14's I can't really see why theses warnings should suddenly crop
up.
Other info: The device is attached through an Adaptec AHA-2940U/UW/D
PCI controller on an ICH6 Buckner board. There's also two SATA disks in
the machine (/dev/sda and /dev/sdb for linux), the failing device
being sdc. Furthermore, a USB2 external drive is also present as
sdd. None of the other devices complain. In addition to the RAID,
there is an HP tape changer on the Adaptec's bus.
Am I right in not worrying too much? What's the smart way of getting
rid of the warnings (short of commenting out the printks)?
Cheers,
Markus
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