Tandem HP NonStop
5145 4mm DAT (DDS3)|
- 5145 DAT 4MM Tape
Drive Tabletop P/N 134225 / U34225
- 5145ACL DAT 4MM Tape
Drive Tabletop ACL P/N 134226 / U34226
HP 5145 Tape Drive Details
5145 Digital Audio Tape (DAT) delivers the economies of
DAT technology in a cartridge tape drive specially designed and
built for Tandem by Tape Labs.
exceptionally high capacity of the 5145, its low cost per
megabyte, and its read/write speed make it an excellent choice for
tape backup for entry-level Tandem HP NonStop Himalaya
servers. Employing the newest DDS-3 recording techniques with
on-board hardware data compression, the 5145 can store as
many as 24 gigabytes of data on a single cartridge and read or write
up to 2 megabytes of data per second. The DAT standards
committee has set the DDS-3 data recording format to be
backward read/write compatible with the previous DDS and
DSS-2 recording formats. Thus a 5145 DDS-3 machine can
process the tape media created on the previous 5145 DDS-2
systems. This feature enables the 5145 to be added to an
operations environment that includes 5141 subsystems. Note,
however, that the 5141 DDS-2 subsystems cannot process
media created in the DDS-3 recording format.
5145 is easy to operate. It features a 32-character,
interactive control panel and an internal self-test diagnostic
routine that lets you quickly ascertain the status of the drive. The
5145 also includes flash EPROM memory that lets you easily
update microcode or performance options.
5145 drive can be installed while your Tandem HP NonStop
servers remain online, and it requires no application rewrites
or additional software. With its superior operational
characteristics and low cost, it is well suited for the Tandem
environment, where performance and reliability are critical.
High-capacity cartridge tape storage
5145 drive is a third-generation DAT drive that
employs DDS, DDS-2, and DDS-3 high-density
recording techniques to provide maximum storage capacity per
the new DDS-3 recording method, the 5145 media can
store as many as 12 gigabytes of uncompressed data or 24 gigabytes
of compressed data on a single cassette. (Each 5145 DDS-3
cartridge contains 125 meters of 4-millimeter tape.)
Because it can store such a large amount of data on a small amount
of tape, the 5145 is able to back up the database of a
typical entry-level Tandem HP NonStop Himalaya K-Series server on only
one or two cassettes, drastically reducing the amount of operator
involvement in tape backup procedures.
the 5145, operators change tape cartridges far less
frequently than with older cartridge or open-reel tape media: The
amount of data stored on a single 5145 cartridge (12
gigabytes) would occupy 94 Tandem 5126 tape drive
cartridges or 80 standard 2,400-foot reels of 0.5-inch, 9-track
tape encoded at 6,250 bits per inch. With typical 2:1 data
compression, a single DDS-3 data cartridge can store 24 gigabytes,
or the equivalent of 160 half-inch, 9-track, 2,400-foot open reel
tapes or 188 Tandem 5126 cartridges.
5145ACL offers the added functionality of a six-cartridge
automatic cartridge loader (ACL). Thus up to 144 gigabytes of
data can be written to tape with a single insertion of a
six-cartridge data magazine. Operator intervention can be
practically eliminated for most entry-level Tandem HP NonStop Himalaya
Low Cost Per Megabyte
5145 offers the best price/performance of any tape subsystem
designed for use with Tandem Himalaya servers. In many cases, only a
single cartridge is required for the backup of an entire database
(up to 24 gigabytes), so operations can schedule unattended nightly
system backups. Significant savings can be achieved in equipment
costs and in the cost of operatorsí time.
addition, the low price of the 5145 makes it feasible to run
multiple 5145 drives, in parallel at a single site, for
increased performance or storage capacity.
read/write performance of the 5145 lets you complete backup
operations in less time than with other comparable media. The
maximum burst data-transfer rate of the 5145, without using
data compression, is 1,000 kilobytes per second, for a total of 3.6
gigabytes per hour. The effective burst data-transfer rate using
data compression is 2 megabytes per second. The actual performance
depends on the specific system type and application.
5145 drive incorporates several features that help operators
monitor and control backup operations. Among these are the
interactive control panel.
The LCD control panel of the 5145 can display a variety
of information for operators, including current operation,
performance data, compression status, error codes, and a message
indicating that routine maintenance is necessary. Using the control
panel in conjunction with the mode button, operators can enable or
disable data compression and initiate internal self-test
Internal self-test diagnostic routines.
These routines enable the 5145 to diagnose problems
with its drive or electronics while offline. Error codes are
displayed on the control panel.
Installing a 5145 drive is as simple as connecting a
SCSI cable. Using Tandemís standard SCSI cables, the 5145
connects to either an MFC SCSI port or to
the 3214 Dedicated controller that
has an appropriate interface installed.