cciss: no appropriate device detected SCSI subsystem not engaged

[Eliezer Nebab]

Greetings!

After adding two new 146.8GB U320 10K RPM disks in an MSA30DB externally connected to an ML370 G4, I'm getting the message:

cciss: no appropriate SCSI device detected, SCSI subsystem not engaged.

I configured the two disks as RAID1+0 using the hp acu WEB utility but have not assigned any linux partitions at this time.

The system is running RHEL 3 - AS Update 8. The MSA30DB is dual-channel configured where the disks are mirrored across 2 channels on a Smart Array 6404 (4 ch controller).

What does this error mean? Is this error informational (ie: warning) only or is it critical?

[Zeev Schultz]

Bit of implementations explained - cciss driver is (or was) till now block device driver and not directly SCSI driver (new kind). So to become known to Linux SCSI layer driver as true SCSI device, driver should register to SCSI subsystem.

Basically, doing this should help

echo "engage scsi" > /proc/driver/cciss/cciss*

Source:

http://h50146.www5.hp.com/products/software/oe/linux/mainstream/bin/support/doc/option/scsi/mptlinux-3.02.56-4.rhel4.x86_64.rpm.readme.txt