DAT 72 (Models 5242 and 5242ACL) Tape Drive User's Guide
Section 3: HP 5242-ACL Tape Drive 
Section 3 
5242ACL Tape Drive Subsystem 
Chapter One 
1.1 Introduction 
The 5242-ACL is a 4mm tape backup device. The 5242-ACL offers high-capacity, on-line tape storage, 
outstanding performance, and trouble-free operations.  It combines a changer mechanism, a DAT 72 tape 
drive, data compression, and a SCSI interface. The LCD on the front panel of the 5242-ACL provides a clear 
and comprehensive status report of the tape drives activities. 
The 5242-ACL houses up to six DAT 72 cartridges In a removable magazine and enables backup of up to 
432GB of data, assuming a 2:1 compression ratio. The 5242-ACL supports sequential access mode with 
minimum interruption time between cartridges. 
1.1.1  The 5242-ACL tape drive includes: 
•  Tape drive with 6-cartridge magazine 
•  LCD status display and control panel 
•  Differential SCSI interface 
• Terminator 
•  Power supply and fan (integrated into the enclosure) 
• Power cord 
• User manual 
Write
E F
COMPRESS
 2.3:1
Eject
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Figure 28  5242-ACL tape drive 
1.2 5242-ACL Features 
•  Cartridge magazine carrying up to six DAT72 cartridges–typical magazine capacity of 216-432 
gigabytes using 170m cartridges 
•  Support for DDS-3 125m tape cartridges 
•  Tape drive firmware upgradeable by code tape 
•  Subsystem firmware upgradeable by code tape 
•  Tape drive streaming transfer rate of 3 MB/s and up to 2:1 data compression 
HP StorageWorks DAT 72 (Models 5242 and 5242-ACL) User's Guide  33 HP Part Number 528296-03  July 2005 
•  Three levels of error correction code (ECC) 










