Acer AcerAltos 3102RS, User Manual

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User’s Guide
24
Drive-Side SCSI Parameters
SCSI Motor Spin-up
When the power supply is unable to provide sufficient current for all
the hard drives and controllers that are powered-up at the same time,
spinning-up the hard drives serially is one of the best way of
consuming lower power-up current.
By default, all hard drives will spin-up when powered-on. These hard
drives can be configured so that all of them will not spin-up at power-
on. There are 3 methods of spinning-up the hard drive’s motor: Spin-
up at power-on, Spin-up serially in random sequence or Spin-up by
SCSI command. Please refer to the hard drive’s user’s manual for
instructions on configuring the hard drive using the "Spin-up by SCSI
command". The procedure for each brand/model of hard drive should
vary.
Configure all the hard drives as above and enable "SCSI Motor Spin-
Up" in Drive-Side SCSI Parameters. Power off all hard drives and
controller, and power them on again. All the hard drives will not spin-
up at this time. The controller will then spin-up the hard drives one by
one at four seconds interval.
If the drives are configured as "Delay Motor Spin-up"
or "Motor Spin-up in Random Sequence," some of
these drives may not be ready yet for the controller to
access when the system powers up. Increase the
disk access delay time so that the controller will wait
a longer time for the drive to be ready.
SCSI Reset at Power Up
By default, when the controller is powered up, it will send a SCSI bus
reset command to the SCSI bus. When disabled, it will not send a
SCSI bus reset command on the next power-up.