Jeff Garzik wrote:
Douglas Gilbert wrote:
sdparm uses the START STOP UNIT SCSI command to start
and stop (spin up and spin down) SCSI devices.
Currently libata does not implement that SCSI command.
[Hopefully Jeff contradicts me.]
Correct.
Someone should submit a libata patch for this!
Jeff,
A further thought about implementing the START STOP
UNIT SCSI command in libata: the TEST UNIT READY
SCSI command should become more than just a no-op.
Additional sense code 4 ("Logical unit not ready, ...")
seems to have a special for SAS (including SAS's ability
to hold a SATA disk spun down at power on):
ASC/ASCQ=[0x4,0x11] "Logical unit not ready, notify
(enable spinup) required".
Doug Gilbert
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