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Data Transfer Rate
The maximum obtainable data transfer rates for the tape drive
depend on what mode it is operating in. Table 6-6 shows the data
transfer rates for each of the four formats.
Type of
transfer
Rate achieved for these formats . . .
8500c
a
8500
a
8200c 8200
Sustained
transfer rate
up to 1
MBytes/sec
b
up to 500
KBytes/sec
up to 500
KBytes/sec
b
up to 262.5
KBytes/sec
Synchronous
burst
up to 5.0 MBytes/sec
Asynchronous
burst
up to 2.5 MBytes/sec
a
EXB-8505 and EXB-8505XL only
b
Assumes a 2:1 compression ratio
Notes: When compression is enabled, the tape drive can increase
the sustained transfer rate of up to five times. Compression
throughput and capacity ratios depend on the type of data.
The maximum burst data transfer rate is limited by the
performance of the SCSI host bus adapter, the SCSI bus
interface controller, and the tape drive’s buffer control
hardware.
Reselection Phase Timeout
If the initiator fails to respond to a device reselection sequence, the
tape drive times out after 250 msec. The tape drive continues to repeat
the reselection process until it is reset or the initiator finally responds.
Table 6-6 Data transfer rates
6-6 EXB-8205 and EXB-8505 510504
(Standard and XL)
6 Functional Specifications