Apple Workgroup Server 8550 - Manual (Page 78)

Compatible tapes
Your internal DAT (digital audio tape) drive is compatible with MRS-
quality DDS (digital data storage) tape cassettes. MRS (Media Recognition
System) cassettes are the highest-quality digital data tape available. Your
internal tape drive requires this level of quality to perform backup
operations successfully. See your Apple-authorized service provider for
more MRS-quality DDS tape cassettes or their compatible substitutes.
Compatible cassettes are typically stamped “Digital Data Storage” and
longer-length cassettes (120 meters) need the “DDS2” designation. If you
use cassettes not approved by your Apple-authorized service provider, you
void the warranty on your tape drive.
IMPORTANT Some vendors of computer products may refer to DDS
cassettes as digital audio tape (DAT) cassettes. However, DAT (audio)
cassettes have a different mechanical specification from DDS cassettes. For
backing up your server files, be sure to use only those DAT cassettes
designed for MRS.
Tapes supplied with the server
Two cassettes are supplied with your Workgroup Server. The first is a blank
DDS cassette for backup and restore operations. (The blank tape included
with your system has a maximum storage capacity of 10–14 gigabytes of
compressed data.) The second is a cleaning cassette; its operation is
discussed later in this chapter.
Starting up the tape drive
The tape drive receives power and performs a self-test when you start up
your server. During the test, both status lights next to the tape drive
opening are solid green; then the light on the left flashes green and the light
on the right turns off. If no tape is loaded in the tape drive, both status
lights turn off. If a tape is loaded in the tape drive, the light on the left
becomes solid green.
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