Quantum SDLT 320 User Manual Page 41

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SDLT 220 and SDLT 320 Product Manual CHAPTER 3: Drive Specifications
81-85002-01 March 2004 3-7
3.2.1 SDLT 220/320 Performance Data
Table 3-6 provides performance data for the SDLT system. For a comparison of
SDLT 220/320 storage capacities, refer to Section 3.1.3, “Storage Capacity” on
page 3-3.
Table 3-6. SDLT 220/320 Performance Data
Feature SDLT 220 SDLT 320
Drive Read / Write
Transfer Rate*
11 MB/second, native 16 MB/second, native
Tracks
56 logical tracks;
448 physical tracks
Same
Track Density 1058 tracks per inch (tpi) Same
Linear Bit Density 133 Kbits per inch (bpi) 193 Kbits per inch (bpi)
Read / Write Tape Speed 116 inches per second (ips) 122 inches per second (ips)
Rewind Tape Speed 160 ips Same
Linear Search Tape Speed 160 ips Same
Average Rewind Time 69 seconds Same
Maximum Rewind Time 140 seconds Same
Average Access Time
(from BOT)
70 seconds Same
Maximum Access Time
(from BOT)
142 seconds Same
Load to BOT
12 seconds (typical)
40 seconds (unformatted tape)
Same
Unload from BOT 12 seconds Same
Nominal Tape Tension
Stationary = 3.0 ± 0.5 oz
Operating Speed = 3.5 ± 0.5 oz
Same
* Depending on data type and SCSI bus limitations/system configuration.
Note that data is typical; times may be longer if error recovery time is needed.
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