Connecting External Options
Connecting External Options
To connect external options (SCSI drives, printers, modems, and
other serial and parallel devices), see the documentation that comes
with the options.
The information in this section supplements the instructions that
come with the external option. Use the instructions that come with
the option to prepare it for installation.
Adding External SCSI Devices
The SCSI adapter that comes with your server can support a
maximum of 15 devices. If your server has five internal SCSI
devices, the controller can support up to ten external devices.
If you plan to install both internal and external SCSI devices, you
must follow the instructions given in “Working with Internal
Drives” on page 77 in addition to the instructions in this section.
Read “Working with Internal Drives” on page 77, and then return
here.
You must set a unique SCSI ID for each external SCSI device so that
the controller can identify it. The controller can then ensure that
different devices do not attempt to transfer data at the same time.
Therefore, do not set the SCSI IDs for external devices to the same
values you used for internal devices.
If you plan to attach an external SCSI device, you must order an
additional SCSI cable. That is, to use an external device with the PC
Server 315, you must connect it to the external SCSI connector, using
a SCSI cable. This SCSI cable must have the proper connector for
the SCSI external connector on one end, and the proper connector
for the external device on the other end. To select and order the
correct SCSI cable for use with the external device, contact your IBM
reseller or IBM marketing representative.
Chapter 3. Installing Options
117