Warranty
Maximum
The remaining warranty of the server product in or onto which it is installed to a
maximum three-year limited warranty.
(Certain restrictions and exclusions apply.
Consult the Customer Support Center for details.)
Minimum
Three year parts, one year next-business day exchange
Liquid Crystal Display
(LCD)
The dot matrix front panel information display provides user-friendly information on the autoloader's operating status,
potential error conditions, current cassette and magazine status.
Recommended Maximum
Server Size
40 GB
Performance Specification Native
Maximum
8.4 GB/hour
Typical
6.0 GB/hour
2:1 Compression
Maximum
16.8 GB/hour
Typical
15 GB/hour
NOTE: Typically, users will be able to compress their data at a 2 to 1 ratio; however, compression ratios will vary
based on the type of data being compressed.
Cartridge Swap Time
50 seconds/average
Load Time
58 seconds/average
Unload Time (depending on
tape type and position)
32 seconds to 160 seconds
Search Speed
45 seconds average file access for any part of a 150 meter tape
Maximum Formatted
Capacity (unattended)
8-Cassette Magazine
Without compression
160 GB
Based on typical 2:1
compression ratio
320 GB
NOTE: Typically, users will be able to compress their data at a 2 to 1 ratio; however, compression ratios will vary
based on the type of data being compressed.
Mechanical
Measurements
Tape Width
0.15 in (0.38 cm)
Tape Length
492 ft (150 m)
Dimensions (HxWxD)
3.25 x 5.75 x 9.51 in (8.26 x 14.61 x 24.16 cm)
Weight
5.258 lb (2.4 kg)
Tape Speed
Read/Write
0.46 ips/11.6 mm/s
Head to Tape Speed
262 ips/6,670 mm/s
Rewind/Fast Forward
130 x Read/Write Speed
Tape Format
Recording Method
Helical Scan
Bytes/Group
38,4296
Data Frame/Group
22
Density/Inch
122,000
Flux Reversal/Inch
1,524,000
Track Density/Inch
2,793
Data Encoding Method
PRML
Data Transfer Rate
2.3 MB/s
Error Detection/
Correction
Reed-Solomon-3 levels
Reliability Cartridge Swaps > 100,000
MTBF
250,000 hours at 30% duty cycle
© Copyright 2003 Hewlett-Packard Development Company, L.P.
The information contained herein is subject to change without notice.
Windows NT is a US registered trademark of Microsoft Corporation. Intel is a US registered trademark of Intel Corporation. Unix is a registered
trademark of The Open Group.
The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services.
Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions
contained herein.
QuickSpecs
HP StorageWorks 20/40-GB DAT DDS-4 8 Cassette
Autoloader
Technical Specifications
DA - 10518 Worldwide — Version 16 — October 22, 2003
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