Sun Microsystems Fire 880, Руководство пользователя

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78 Sun Fire 880 Server Owner’s Guide • August 2001
About Removable Media Devices
The Sun Fire 880 system provides front-panel access to three mounting bays for
5.25-inch half-height (1.6-inch) SCSI devices. One of the bays houses a SCSI
DVD-ROM drive, which comes standard in all system configurations. You can use
the other two bays for wide (68-pin) or narrow (50-pin) SCSI tape drives, such as
8-mm tape, 4-mm DDS-2 or DDS-3 tape, or quarter-inch cassette tape drives. Narrow
SCSI devices require a 68-pin to 50-pin SCSI adapter (Sun part number X913A),
which must be ordered separately. You can easily convert these same two bays into a
single full-height bay by removing a metal shelf divider.
The SCSI bus that supports the removable media devices is Fast/Wide-capable (20
Mbytes per second) and can support single-ended, wide or narrow SCSI devices.
Target addresses (also known as SCSI IDs) for the SCSI bus are available in the
ranges of 0 through 5 and 8 through 15.
The following target addresses are reserved for internal devices.
Configuration Rules
You cannot assign target addresses 6 or 7 to any SCSI removable media device; they
are reserved for the system’s DVD-ROM drive and SCSI host adapter.
Note –
All internal options (except disk drives and power supplies) must be
installed only by qualified service personnel. For information about installing or
removing removable media devices, see the
Sun Fire 880 Server Service Manual , which
is included on the Sun Fire 880 Documentation CD .
Address Device Comment
5 Tape drive If no tape drive is installed in the system, you can use this
address for an external device. If you later install an internal
tape drive, you must use 5 as its address and assign a different
address to the external device.
6 DVD-ROM This address is reserved exclusively for the DVD-ROM drive.
It cannot be used for any other device.
7 SCSI host
adapter This address is reserved exclusively for the SCSI host adapter
on the system’s motherboard. It cannot be used for any other
device.