QuickSpecs

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.
HP StorageWorks OBDR
(One-Button Disaster
Recovery)
With HP One-Button Disaster Recovery, you can quickly, reliably and simply restore your entire ProLiant
system just by inserting the most recent backup tape and pushing one button on the tape drive. Your HP
StorageWorks DAT drive will restore your operating system, configuration, applications, drivers and data
files. There's no longer a need to search for software disks and manuals. And with downtime reduced,
the costs of recovery are minimized too. There's no need to make a new set of disaster recovery disks
each time the network configuration is altered or a peripheral is added. Recovering from a disaster
manually at a stressful time makes for an error-prone process. The sheer simplicity of HP One-Button
Disaster Recovery means less human error. Backup and disaster recovery preparation -- previously two
separate tasks -- become one process. OBDR is simply the best disaster recovery product for small to
medium systems. For a current list of servers, workstations, and software that support OBDR, check the
tape backup compatibility pages at:
http://www.hp.com/go/obdr
QuickSpecs
HP StorageWorks DAT Drives
Product Highlights
DA - 11883 Worldwide QuickSpecs — Version 25 — 8.6.2007
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