Archive PYTHON 4322 Product Description Manual page 15

ARCHIVE PYTHON DDS-DC OAT DRIVES---PRODUCT DESCRIPTION MANUAL
1.3 Features
The Python data compression drives embody Archive's commitment to engineering reliable and durable tape
drive products which implement leading-edge technology. In summary form, key features of the Python
DDS-DC drives are:
o
All Python DDS-DC drives based on proven 3.5-inch Python DAT drive, with the identical drive
mechanism used in standard (non-compressed) Python products
o
3.S-inch internal form factor for installation in a 3.S-inch half-high space (Model 4322NT and
4322NP)
o
3.S-inch DAT drive with factory-installed S.25-inch mounting rails and bezel for installation in a
S.25-inch half-high space (Models 4S42NT and 4S42NP)
o
External subsystem with built-in, auto-sensing, worldwide power supply (Model 4352)
o
Advanced onboard DDS-DC hardware using DCLZ (Data Compression LempelZiv) data
compression algorithm
o
ANSI/ECMA DDS and DDS-DC tape format compliance for compatibility and interchange
o
Reads and writes both DDS uncompressed and DDS-DC compressed data and data cassettes
o
Typical capacity of 4 GB, nominal maximum capacity of 8 GB on a 90-meter DDS cassette
o
High speed random access of 20 seconds (average) to any file on a 60 m tape; 30 seconds for a
90 m tape
o
High speed transfer rates for fast backups:
-- 183 KB/sec (11 MB/min)---uncompressed data
-- 366 KB/sec (22 MB/min) typical---compressed data
-- 732 KB/sec (44 MB/min) nominal maximum---compressed data
o
High performance SCSI burst transfer rate of S MB/sec with up to 1 MB on-drive data buffer to
facilitate the most efficient use of the host computer
o
Four-head design with RAW error detection and rewrites
o
Three levels ofECC to ensure data integrity
o
Uncorrectable error rate ofless than 1 in 10
15
bits
o
Flash EEPROM ("NP" and "XP") models enable electrically upgradeable drive firmware
o
Custom Archive designed LSI circuitry to reduce component count and boost drive reliability
o
Advanced, single-chip, DAT formatter LSI
o
Low power consumption---Iess than 7 Watts (typical) for internal drives
o
Single-ended SCSI connection with these features:
-- Embedded full LSI, high speed SCSI controller
-- Switch selectable SCSI-1 or SCSI-2 interface on internal models (as default setting at power up)
for flexibility in system integration
-- Software selectable SCSI-1 or SCSI-2 interface on all models
-- Software selectable synchronous or asynchronous SCSI data transfer
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