HP 220mx HP SureStore 9100mx Optical Disk Drive User's Guide - Page 18

Connecting the Drive to Your Host Computer

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Setting up the Disk Drive Connecting the Drive to Your Host Computer Connecting the Drive to Your Host Computer The disk drive is a "narrow," single-ended SCSI-2 device. This means that the drive connects to a 50-line single-ended-type SCSI bus using 50-pin high-density connectors. You can connect the drive to a SCSI bus either as the only device on the bus or as one of a number of devices on the bus (daisy-chained). The SCSI ID you choose for this drive identifies the drive on the bus and also sets its priority for use of the bus. If you would like more information on the operation of the SCSI bus, refer to Appendix B. Also, refer to your host adapter's documentation for guidance on installing this drive on the bus. The following sections will describe the steps to install this drive onto the bus. You must do the following: • Determine and set the drive's operating mode • Determine and set the SCSI ID of the drive • Attach the bus cable and ensure the bus is properly terminated Setting the Operating Mode and Write Verify This drive may be operated in two modes: • as an optical memory device • as a direct access device In most cases, you can select the optical memory device mode (which is the default setting). Choose the "direct access device" mode if your system does not support optical memory devices or if your system requires a direct access device. Check your system documentation to determine which mode to select. In either mode of operation, you have the choice of write verify on or off. The write verify configuration ensures that data is written reliably to an optical disk. The drive ships with write verify enabled. Many software applications also default to this method of writing. Writing data on a magneto-optical disk requires two passes. The first pass erases the data in the sector to which data will be written. The second pass writes new data to that sector. 1- 6 Chapter 1

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1-6
Chapter 1
Setting up the Disk Drive
Connecting the Drive to Your Host Computer
Connecting the Drive to Your Host Computer
The disk drive is a
“
narrow,
”
single-ended SCSI-2 device. This means that the drive
connects to a 50-line single-ended-type SCSI bus using 50-pin high-density
connectors.
You can connect the drive to a SCSI bus either as the only device on the bus or as
one of a number of devices on the bus (daisy-chained).
The SCSI ID you choose for this drive identifies the drive on the bus and also sets its
priority for use of the bus. If you would like more information on the operation of
the SCSI bus, refer to Appendix B. Also, refer to your host adapter
’
s documentation
for guidance on installing this drive on the bus.
The following sections will describe the steps to install this drive onto the bus. You
must do the following:
•
Determine and set the drive
’
s operating mode
•
Determine and set the SCSI ID of the drive
•
Attach the bus cable and ensure the bus is properly terminated
Setting the Operating Mode and Write Verify
This drive may be operated in two modes:
•
as an optical memory device
•
as a direct access device
In most cases, you can select the optical memory device mode (which is the default
setting). Choose the
“
direct access device
”
mode if your system does not support
optical memory devices or if your system requires a direct access device. Check
your system documentation to determine which mode to select.
In either mode of operation, you have the choice of write verify on or off.
The write verify configuration
ensures
that data is written reliably to an optical disk.
The drive ships with write verify enabled. Many software applications also default
to this method of writing.
Writing data on a magneto-optical disk requires two passes. The first pass erases the
data in the sector to which data will be written. The second pass writes new data to
that sector.