Owner manual

Section 3: HP 5242-ACL Tape Drive
• Large 8-megabyte data buffer to maintain host transfer rate
• Self test diagnostics
Chapter Two
2.1 Mode of Operation
When a cartridge ejects from the 5242-ACL drive following a host UNLOAD command, the autoloader
automatically loads the next available cartridge in the magazine into the drive.
2.2 Terminology
Unloaded A cartridge unloads when it moves from the drive and is placed in the magazine. In this
state, the drive is off-line, and the host cannot perform any operation that would cause tape
motion (write, read, space commands). The NonStop server can issue the LOAD command
to put the tape drive on-line. Additionally, the NonStop server can execute any diagnostic
command that does not access the tape.
Semi-Loaded A cartridge semi-loads when the cartridge is in the tape drive mechanism, but the tape is
not threaded around the head. The tape drive is off-line in this state.
Loaded The tape loads at the end of the load sequence. Then the tape drive is on-line and can
execute all commands, including those that set configurations or run diagnostic tests.
2.3 Front Panel Buttons
Programmable
Error-Alert LED
Compression
Indicator LED
Write
E F
COMPRESS
2.3:1
Eject
6
Mode
Switch
4-Line LCD,
8-Characters per line
Select Button
Eject
Button
Load
Tape
Button
Tape
Activity
LED
Operator
Attention
Required
LED
Magazine
Present
LED
Autoloader
LCD
Figure 29 5242-ACL front panel
HP StorageWorks DAT 72 (Models 5242 and 5242-ACL) User's Guide 34 HP Part Number 528296-03 July 2005