QuickSpecs

operating with a compression ratio of 9:1!
USB 2.0 performance provides sufficient bandwidth to support all future generations of
DDS/DAT drives specified on the DAT Manufacturers Group Roadmap
Native SCSI
In addition to offering native USB and SAS connectivity, HP remain committed to producing DAT
drives with SCSI interfaces for the foreseeable future. This widely respected interface continues to
meet mainstream server requirements for performance and reliability.
Compression DDS uses built-in hardware compression using the 'DCLZ' data compression algorithm. Data
compression is host-selectable with the default that compression is turned on. Typical data
compression is 2:1, but actual compression depends on the type of data being compressed and
can be more or less than 2:1.
SCSI Offline Hot-Swap
Technology
NOTE: this feature is available for SCSI products. USB variants of HP DAT drives already benefit
from hot-plug capability through the USB 2.0 interface.
The HP StorageWorks DAT SCSI tape drives are available as offline hot-swap models to increase
your uptime. With these models, you never have to take down your system to replace a failed or
non-responding tape device.
The HP StorageWorks Tape Array 5300 supports "offline hot-swap" (sometimes referred to as
"warm-swap") array modules, including DAT drives. This means the drives can be removed and
replaced with the power on and the SCSI cables attached to the server. Because the array's SCSI
buses are not buffered, however, drive replacement should only take place while the SCSI bus is
quiescent (no SCSI activity from the tape drive or any other device on the same bus).
With the HP StorageWorks DAT or array modules, the server does not need to be taken offline to
install the tape drive. Simply insert the tape drive into the server's Tape Array 5300's drive bay
and install or configure the backup software.
Rack-Mount Tape
Options
HP DAT SCSI drives are supported on the HP StorageWorks 1U and 3U Rack-Mount Kits and the
HP StorageWorks Tape Array 5300. The 3U Rack-Mount Kit and the Tape Array 5300 allow up to
four internal DAT drives to be installed in 3U of rack space, while the 1U Rack-Mount Kit holds two
DAT drives in 1U of space. 1U rack-mount kits use standard internal DAT USB and SCSI drives
for a low-cost solution. 3U rack-mount kits use standard internal DAT SCSI drives while the Tape
Array 5300 uses DAT array modules that provide offline hot-swap capabilities and redundant
components for high-availability environments.
Either of these rack enclosures can be configured with separate SCSI buses (channels) for each
drive or two or more drives per bus using the optional cable kits.
NOTE: Please refer to the QuickSpecs for HP StorageWorks Rack-Mount Kits at
http://h18000.www1.hp.com/products/quickspecs/10854_div/10854_div.html
or the HP StorageWorks Tape Array 5300 web page at
http://www.hp.com/products1/storage/products/tapebackup/tapearrays/tapearray5300/index.html
for further information.
QuickSpecs
HP StorageWorks DAT Drives
Product Highlights
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