Hi! With my Plextor PX-40TSi (two models 1.5 and 1.12) on o2 I have the message on image bellow... why? The cdrom is perfect (read and boot) and on other sgi machines don’t show this message. Any way to remove it?
Seems to be a command sent by the kernel at cdrom, and cdrom not respond... but I don’t know what’s command it is. Other than the annoying message, it slow down the boot process.
Could it be that the O2 sends a command before the drive is ready?
Does it behave the same at power on as when doing a warm restart?
You could try and remove the Reset signal and see if it is has to do with that the O2 asserts Reset to close in time to the first command sent to the drive since I dont think reset is needed
The diagnostic info (asc = 0x4, asq = 0x1) refers to the SCSI Primary Commands standard (SPC). It means, "Additional Sense Code, and Additional Sense Code Qualifier" are 4 and 1 respectively.
This combination of values is used by the target to report the condition "Logical Unit Not Ready, Becoming Ready".
Without putting a logic analyzer on the Plextor, my assessment is that the O2 is requesting information while the drive is not yet ready to communicate. All SCSI devices should be able to respond to INQUIRY commands at any time, however. So it may be the O2 is using MODE SENSE or MODE SELECT (in particular, to adjust block size?) before the drive is fully online.
NEED -> 
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