Chapter 3 Hardware Configuration 67
About Removable Media Devices
The Sun Fire V890 system provides front-panel access to three mounting bays. One
bay houses an IDE DVD-ROM drive, which comes standard in all system
configurations. The other two bays can house optional wide (68-pin) SCSI removable
devices, which must be ordered separately. The tape drive option also requires a
SCSI cable and a SCSI adapter card; both must be ordered separately. A qualified
service technician can easily convert the two SCSI device 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 SCSI devices.
Target addresses (also know as SCSI IDs) for the SCSI bus are available in the ranges
of 0 through 5 and 8 through 15.
The target address reserved for the optional tape drive is 5.
If no tape drive is installed, 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.
Caution – 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 V890 Server Service Manual,
which is included on the Sun Fire V890 Documentation CD.
About the Serial Ports
The system provides two serial communication ports through a single, shared DB-25
connector located on the rear panel. The primary port is capable of both
synchronous and asynchronous communication, while the secondary port is
asynchronous only. In synchronous mode, the primary port operates at any rate
from 50 Kbaud to 256 Kbaud when the clock is generated internally. When the clock
is generated from an external source, the synchronous port operates at rates up to
384 Kbaud. In asynchronous mode, either port supports baud rates of 50, 75, 110,
200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 153600,
230400, 307200, and 460800.
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