PRODUCT DESCRIPTION
The 20/40 GB DAT DDS-4 tape drive is a high performance,
low-cost tape backup solution for the corporate server market.
The DDS-4 tape drive is the next generation from a long line of
DAT products. This drive offers 20 GB native capacity with a
transfer rate of 2.4 MB/s and will utilize hardware data
compression which can double these characteristics to 40 GB and
4.8 MB/s.
The DAT 20/40 GB drive uses a helical-scan
recording technique, which has been specifically designed to
suit the special requirements of digital data storage devices.
This drive also incorporates the ability and opportunity to
rewrite the data repeatedly until the data has been read
successfully just incase there is an error during the write
process.
KEY FEATURES
High capacity, more reliability and faster
data transfer rates are needed by customers ranging from the
high-end workstation environment to the mid-range departmental
server market.
Ability to backup more data in less time
and at a lower cost per Megabyte compared to the 12/24 GB DAT.
Offers investment protection for DDS-2 and
DDS-3 customers who have standardized on the DDS technology by
offering higher capacity, performance, reliability and
back-wards read/write capabilities.
QuickSpecs
Compaq 20/40-GB DAT Tape Drive
Models
20/40-GB DAT Drive,
Internal
157769-B21 (Opal)
3X-SD20X-AA
3X-SD20X-LB (AlphaServers only, Top Gun Blue)
20/40-GB DAT Drive, External
157770-001 North America (Opal)
157770-B31 International
157770-291 Japan
20/40-GB DAT Drive, Hot Plug
215488-B21 (Carbon)
3R-A2780-AA
Feature List
LVD standard Interface
Internal, External and Hot Plug configurations
2.4 MB/s data transfer rate
20-GB native capacity
Overview
The 20/40-GB DAT tape drive
now comes in three different configurations, internal, external and the
newest Hot Plug. This devices offers 20GB native capacity on a Compaq
DDS-4 cassette with a transfer rate of 2.3 MB/s.
Compaq 20/40-GB DAT Tape drive Customer benefits include:
Backup rate 8.6 GB/hr native
20/40-GB DAT offers investment protection with backward
compatibility with previously written DDS-1, DDS-2, and DDS-3 media.
Reduced spares inventory with a 24 hour exchange
Easy installation and service
High availability data protection – increases server up-time
Product Family Models:
157769-B21/3X-SD20X-AA, 20/40-GB DAT, Internal opal option kit
with accessories
3X-SD20X-LB, 20/40-GB DAT, Internal top gun blue option kit with
accessories for AlphaServers
157770-001, 20/40-GB DAT, External option kit with accessories
215488-B21/3R-A2780-AA, 20/40-GB DAT, Hot Plug option kit with
accessories
Key Features
20-GB native capacity, 40 GB with 2:1 compression
2.4 MB/s native data transfer speed
Internal, external and hot plug configurations
Standard industry interface, LVD
Small form factor, half-height built out to 5 ¼ inches
Hot plug configuration fits into a 1.6-inch hot plug bay or two
1-inch hot plug bays in Compaq Servers and StorageWorks™
Enclosures by Compaq
Supported with VERITAS Backup Exec, Computer Associates and Dantz
Retrospect software
Innovative SCA direct connect tape carrier
Easy removal of parts provides better serviceability. No tools are
required! (Hot Plug and External configurations only)
Qualified behind Windows NT 4.0, Windows 2000, Novell NetWare,
Tru64 UNIX, OpenVMS, Linux, SCO Unix, and Sun Solaris
Product Highlights
Disaster Recovery -
DRTape
The 20/40-GB DAT tape drive
has been improved with the added feature of DRTape. DRTape insures that
in case of a system failure, you will be able to restore your system
from a single tape.
What is Disaster Recovery: A 20/40-GB DAT Tape Drive that can:
Under Disaster Recovery (DR) situations, ID itself as a boot
device
Hold enough information to bring the system up for a DR restore
from tape
Is completely self contained in that it needs no other software or
CD’s to restore the system.
Hot Plug
Able to mix tape drives and
hard drives on the same SCSI Bus without slowing down the performance of
the system.
Supported on Compaq’s Smart Array 5300 controller and Integrated
Smart Array controller and selected AlphaServers hot bus adapters.
Hot Plug components can be replaced without powering down the system.
This feature significantly enhances system availability.
Reliability
Advancements in tape
technology have produced a tape drive that requires less cleaning and
provides improved backup/restore operation. Some of these new
advancements include an automatic, rotating, head-cleaning sweeper that
is used during the write or read recovery procedure to dislodge debris
in the recording heads and drum. This DDS-4 drive has a MTBF rating of
250,000 hours at a 30% duty cycle.
Automated Head Cleaning
Reduces head-cleaning
cycles by two times over DDS-3
Industry-Standard DDS-4
DDS-4 format has a drum
rotation speed of 8503 rpm while the tape moves at 11.6 mm/s. Features
of the format and implementation of it allow an increased linear bit
density compared with DDS-3 drives, achieving a greater transfer rate
and capacity.
Easy Installation and
Serviceability
With Compaq’s hot plug tape
configuration, the server does not need to be taken off-line to install
the tape drive. Simply plug the tape drive into a 1.6²
hot plug bay or add the top hat for a 2-1-inch bay configuration and
install the backup software.
Manageability
Supported through Compaq
Insight Manager, alerting the administrator when tape status changes or
when rewrite/reread thresholds are exceeded.
This utility allows customers to monitor their tape drives for
pre-failure analysis and allows customers to upgrade their tape drive
firmware when necessary.
Mix and Match
Capabilities
With Compaq’s hot plug tape
configuration, customers are now able to mix 1" hot plug hard drives and
tape drives on the same SCSI bus even if they are using Compaq’s
Integrated Smart Array Controller or the Smart Array 5300 series
controller. Customers will no longer need a separate controller for
their tape configurations. Similar support is available on selected
AlphaServer host bus adapters.
Compatibility and
Integration Testing
Compaq’s 20/40-GB DAT tape
drives are fully supported and compatible with Compaq Servers and
controllers. Compaq thoroughly tests products with leading software and
operating systems, including VERITAS Backup Exec, CA ARCserve and Dantz
Retrospect.
High Availability
With hot plug
configurations, you never have to take down your system to replace a
failed or non-responding tape device. This increases your uptime for
customer accessibility to your systems.
Compression
Built-in hardware
compression
Software Supported
Veritas Backup Exec v8.0
for Windows NT/2000
Veritas Backup Exec v8.5 for NetWare
Computer Associates ARCserve v6.61 for Windows NT
Computer Associates ARCserve v6.6 for NetWare
Computer Associates ARCserve 2000 for Windows 2000
Dantz Retrospect Backup v5.6 (Server and Workgroup versions) for Windows
NT/2000
CarePaqs (service &
support)
Additional Warranty
protection and/or Compaq Installation packages can be purchased.
Software Product
Services
Standalone telephone support
Rights to a new license
Media and documentation updates
SmartStart
The server configuration
and software integration tool from Compaq
CS Support
Compaq Services provides a
three-year, limited warranty, fully supported by a worldwide network of
resellers and service providers and toll-free 7 x 24 hardware technical
phone support during the warranty period. In addition, available service
offerings include a full range of CarePaq packaged hardware and software
services:
Installation and start up
Extended coverage hours and enhanced response times
System management and performance services
Availability and recovery services
Warranty
3-0-0 (Three year parts)
Compaq 20/40-GB DAT
Drive Specifications
Protocol
Support
Ultra2 SCSI, LVD interface
O/S Support
Windows NT v4.0, Windows 2000
Netware v4.12 & 5.0
OpenVMS (native)
Tru64 UNIX (native)
Linux for Intel / Alpha (native)
*not supported with hot plug
configuration
SCO
Unix v5.x Open Server (native)
* not supported with hot
plug configuration
SCO
UnixWare v7.1x (native)
not supported with hot plug
configuration
Sun
Solaris v7.0, v8.0 (native)
not supported with hot plug configuration
Dimensions (HxWxD)
Physical
20/40-GB DAT
Drive, Internal
1.6 x 5.9 x 5.9
in/4.06 x 14.98 x 14.98 cm
20/40-GB DAT
Drive, External
10 x 7.9 x 2.6
in/25.4 x 20.07 x 6.6 cm
20/40-GB DAT
Drive, Hot Plug
8.5 x 4.63 x
1.75 in/21.59 x 11.76 x 4.45 cm
Shipping
20/40-GB DAT
Drive, Internal
13.88 x 11.38 x
9.25 in / 35.25 x 28.90 x 23.49 cm
20/40-GB DAT
Drive, External
15.75 x 12.95 x
11.25 in / 40 x 32.83 x 28.57 cm
20/40-GB DAT
Drive, Hot Plug
14.13 x 10 x
11.13 in / 35.89 x 25.4 x 28.27 cm
Weight
Out of box
20/40-GB DAT
Drive, Internal
1.4 lb / 0.63
kg
20/40-GB DAT
Drive, External
18.4 lb / 8.35
kg
20/40-GB DAT
Drive, Hot Plug
1.9 lb / 0.86
kg
Shipping
20/40-GB DAT
Drive, Internal
7.7 lb / 3.5 kg
20/40-GB DAT
Drive, External
25 lb / 11.34
kg
20/40-GB DAT
Drive, Hot Plug
7.75 lb / 3.52
kg
UPC Code
20/40-GB
DAT, Internal
720591222666 /
JAN code 4948382133151
20/40-GB
DAT, External
-001
720591222680
-B31
720591222703 /
JAN code 4948382133182
-291
720591222697 /
JAN code 4948382133175
20/40-GB
DAT, Hot Plug
720591546694 /
JAN code 4948382179326
Cables
Supported
Cables
Internal
Options contain a 2-Device ribbon cable with switchable LVD/SE
terminator
External
Options contain (1) 3ft Wide to VHDCI External Cable
VHDCI to Wide 6
foot – 295644-B21
VHDCI to Narrow
6 foot – 295646-B21
VHDCI to VHDCI
6 foot – 341174-B21
Drive LED Indicators
Busy
Flashes when
the drive is processing a command
Tape
Flashes when
physical media is in motion
Caution
Flashes when
there is an error status on the drive
Buffer
2-MB non-parity buffer embedded within the tape drive
Input Requirements
Range Line
Voltage
AC 100 to
200/220 to 240V
Line Frequency
20 MHz
Typical Input
Current
2.3A at 120 VAC
Interface
Ultra2 SCSI, LVD
Tape Format
Recording
Method
8 mm helical
scan
Recording
Format
ANSI/ECMA-246
Data
Compression
ALDC Adaptive
Lossless Data Compression
Error
Detection/Correction
Reed Solomon
Maximum
Number of Drives
5 drives per
SCSI bus
Maximum
Transfer Rate
16.8 GB/hr (2:1
compression)
Typical
Transfer Rate
6 GB/hr
Average
load/unload swap
< 15 seconds
Search speed
45 seconds to
any point on a 150m cassette
Media
Compaq Branded DDS-4 (150m)
Power
Requirement
+5V±
5%/+12V± 10%
Power
Comsumption
12
Watts (average internal)
21
Watts (average external)
Tape Format
Recording
Method
Helical Scan
Recording
Format
ECMA-288, DDS-4
Data
Compression
Lempel-Ziv (DCLZ)
Error
detection/correction
Reed Solomon
Relative Humidity (non-condensing)
Operating
20% to 80%
Shipping
5% to 95%
Temperature Range
Operating
41°
to 104° F / 5° to
40° C
Shipping
–22°
to 140° F / –30°
to 60° C
Family Comparison
20/40-GB DAT
12/24-GB DAT
4/8-GB DAT
Announce
Date
Oct 1999
June 1998
April 1996
Capacity
(native)
20 GB
12 GB
4 GB
SCSI
Interface
Ultra2, LVD
Fast-Wide/ SE
Single ended
Buffer
2 MB non-parity
1 MB non-parity
1 MB non-parity
Firmware
Upgradable
Yes w/TSMC
Yes w/TSMC
Yes w/TSMC
Maximum
Drives per bus
5
5
5
MTBF
>250,000 @ 30%
>200,000 @ 20%
>200,000 @ 20%
Transfer
Rate (native)
2.4 MB/s
1.2 MB/s
750 KB/s
Server and Tape
Compatibility
ProLiant
Servers
Internal
External
Hot Plug
DL360
X
DL380
X
X
X
DL580
X
X
PL8500
X
X
ML 330
X
X
ML350
X
X
X*
ML370
X
X
X
ML530
X
X
X
ML570
X
X
X
PL8000
X
X
X
CL380
X
X
X
CL1850
X
X
X
Deskpro AP250,
300
X
X
Professional WS
AP550, SP750
X
X
NOTE: When
upgrading a Non-Hot Plug Model to Hot Plug, the purchase of the Hot Plug
Cage Upgrade Option Kit (161275-B21) is required.
Host Bus Adapters and Controllers for Intel Based Servers
SCSI-3
272514-001
*not supported with
hot plug
64-bit Dual
Channel
348757-B21
Dual Channel
Ultra III
129803-B21, -291
*not supported with
hot plug
Dual Channel
64-bit Wide Ultra3
127693-001
*not supported with
hot plug
Single Channel
64-bit Wide Ultra3
154457-B21, -291
*not supported with
hot plug
Integrated
Smart Array Controller
Smart Array
5304/128
158939-B21, -291
Smart Array
5302/64
124995-B21, -291
Smart Array
5302/32
166207-B21, -291
AlphaServer and Tape Compatibility
AlphaServers
Internal
External
Hot Plug
Alpha Server
4100
X
X
AlphaServer
DS10
X
X
X
AlphaStation
DS10
X
X
X
XP900
X
X
X
XP1000
X
X
X
PWS 500a/au
X
X
X
DS10L
X
X
AlphaServer
DS20E
X
X
X*
Alphastation
DS20E
X
X
X*
AlphaServer
ES40
X
X
X*
Alphastation
ES40
X
X
X*
GS60E
GS80/160/320
* NOTE: These platforms also have internal disk enclosures
support of the hot plug option, in addition to support in external LVD
enclosures.
Host Bus Adapters and Controllers Compatibility for AlphaServers
32-bit Single
Channel UltraWide HBA
KZPBA-CA
*not supported with
hot plug
32-bit Single
Channel LVD LSI SYM 8952Uia HBA
SN-KZPCA-AA
32-bit Single
Channel LVD SCSI LSI SYM 8952Uia HBA
3X-KZPCA-AA
32-bit Single
Channel LSI SYM 8951Uia
30-56041-01
Comb SCSI/Ether
Dual Channel
KZPCM-DA
*not supported with
hot plug
64-bit Dual
ChannelUltra 3 LVD HBA
3X/-KZPEA-DB
Combo Ultra2
SCSI/2D Video/10-100 Ethernet
3X/-DEPVZ-AA
Configuration
Information
Base Configuration
Select one:
Model Number
Part Number
Model
Description:
20/40-GB
DAT, Internal
157769-B21
3X-SD20X-LB
3X-SD20X-AA
Contains one
20/40-GB DAT tape drive, US English hard copy manual and translation CD,
Warranty card, 1 DDS-2 data cassette, 1 DAT cleaning cassette,
2-interncal cables.
20/40-GB
DAT, External
157770-001
157770-B31
157770-291
Contains one
20/40-GB DAT tape drive enclosed in an external housing, power cord,
SCSI terminator, 1 DDS-4 data cassette, 1 DAT cleaning cassette,
external 3’ cable, warranty card, US English documentation with
translations CD.
20/40-GB
DAT, Hot Plug
215487-B21
3R-A2780-AA
Contains one
20/40-GB DAT tape drive enclosed in a hot plug carrier, 1 DAT data
cassette, 1 DAT cleaning cassette, warranty card, US English
documentation with translations CD.
