Dell PowerVault 120T DDS4 User Manual

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Dell PowerVault 120T DDS4 Autoloader User's Guide 1-1Chapter 1IntroductionOverviewThe Dell™ PowerVault™ 120T DDS4 Autoloader is a high-capacity data storagecartridge changer using 4mm DAT (Digital Audio Tape) technology. The tape autoloaderachieves high data reliability through read-after-write and an additional level of errorcorrection code (ECC).The tape autoloader stores data on tape using a standard format called DDS (DigitalData Storage), DDSDC, DDS2, DDS3 and DDS4. This format is used by numerousother 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.FeaturesThe 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 100,000cartridge 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