Order Number: EK–SM1TB–UG. E01
A–1
A
Specifications
This appendix describes the physical, electrical, and environmental specifications for the StorageWorks 10/20-
GB DLT Cartridge Tape Drive Family , covering both the SWXTL-BA StorageWorks Building Block (SBB) & the
SWXTL-BT Tabletop DLT Cartridge Tape Drive.
Table A–1 10/20-GB DLT Cartridge Tape Drive Specifications
Characteristic
Specification(s)
Performance
Read/write speed
120 in/s, streaming
Transfer rate, raw
1.7 MB/s
Transfer rate, user native
1.25 MB/s
Transfer rate, user compressed
Over 2.5 MB/s maximum Write
Over 3.0 MB/s maximum Read
Repositioning time (typical)
1.3s
Error rate, detected
1 in 1017 bits read
Error rate, undetected
1 in 1030 bits read (calculated)
Error correction code
Custom Reed-Solomon ECC
Drive interface
SCSI-2
Passes per cassette tape
Over 500,000 passes
Power requirements
120/240 Vac @ 60/50 Hz
Data organization
Recording format
128-track serial serpentine fixed block
Recording density
62,500 bits/in
Track density
256 tracks/in
Data encoding
2,7 RLL
Record size
Variable up to 64 KB with 4-KB blocking factor
Data compression algorithm
DLZ
Maximum capacity (formatted)
20 GB (per cartridge)†
† Assumes a 2:1 compression ratio.
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