Exabyte EXB-8205 Instruções de Operação descarregar pdf (Página 80)

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Start/stop activity increases the amount of wear on the tape and the

CTS’s recording heads. It also decreases the amount of data that can

be stored on the tape because gap blocks and gap tracks are written to

the tape whenever tape motion has to be stopped.

Matching Host and CTS Data Transfer Rates

Table 3-4 shows the data transfer rates that must be achieved to

enable the CTS to operate in streaming mode. If the host is capable,

try to match or slightly exceed these data transfer rates.

For this

CTS

Using this

data format

Streaming data transfers are possible

if the host can maintain or exceed

this data transfer rate...

EXB-8505

8200 262.5 KBytes per second

8200c

500 KBytes per second

(assuming a 2:1 compression ratio)

8500 500 KBytes per second

8500c

1 MByte per second

(assuming a 2:1 compression ratio)

EXB-8205

8200 262.5 KBytes per second

8200c

500 KBytes per second

(assuming a 2:1 compression ratio)

As described in the following section, the motion threshold can be

used to fine-tune the starting and stopping of tape motion in

start/stop mode. The reconnect threshold can be used to fine-tune

disconnects and reconnects between the CTS and the initiator in

streaming mode.

Table 3-4 Host data transfer rates required for streaming data

3-18

EXB-8205 and EXB-8505

(Standard and XL)

510503

3 Implementing CTS Operations

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 445 446

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