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Chapter 1
Introduction
Overview
The Dell™ PowerVault™ 120T DDS4 Autoloader is a high-capacity data storage
cartridge changer using 4mm DAT (Digital Audio Tape) technology. The tape autoloader
achieves high data reliability through read-after-write and an additional level of error
correction code (ECC).
The tape autoloader stores data on tape using a standard format called DDS (Digital
Data Storage), DDSDC, DDS2, DDS3 and DDS4. This format is used by numerous
other DDS tape drive manufacturers, providing a broad range of compatible tape drives.
The tape autoloader is fully READ and WRITE compatible with the DDS4, DDS3, DDS2,
DDS and DDSDC format tapes.
Features
The tape autoloader has the following features:
Data capacity 160 (native) to 320 GB (typical)*
Transfer rate (sustained) ~ 2.4 (native) to 4.7 MB/sec (typical)*
8 cartridge tape magazine
Compatibility with SCSI-2 medium changer command set
80 seconds maximum to swap a tape cartridge
High reliability, with a mean failure rate of less than 1 failure in 100,000
cartridge swaps
Supported formats: DDS4, DDS3, DDS2, DDS, DDSDC
High burst transfer rate -14 MB/sec asynchronous / 40 MB/sec synchronous
Large 10 MB buffer
5.25-inch half height
Embedded wide ultra SE/LVD SCSI interface
Supports variable or fixed record length
Dell PowerVault 120T DDS4 Autoloader User's Guide 1-1
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