Exabyte EXB-8205 Instrucciones de operaciones descargar pdf (Pagina 211)

100

101

Byte 03, Bit 0 - 112m

The 112m bit works in conjunction with the CT bit (byte 02, bit 7) to

indicate the size of the data cartridge that is expected to be loaded in

the CTS. Refer to Table 10-10 on page 10-21 for the combinations of

settings for the CT and 112m bits.

Notes:

If you are using 160m XL data cartridges with an EXB-8505XL or

EXB-8205XL, the CTS ignores the settings of the CT and 112m bits.

You can set the 112m bit only when the tape is positioned at

LBOT.

The 112m bit is equivalent to the P5 bit for the EXB-8500.

Byte 04 - Motion Threshold

The value in the Motion Threshold byte indicates the amount of data

that must be in the buffer before tape motion is started for a buffered

write or read operation. The value is expressed in 4-KByte increments.

The default is 80h (512 KBytes). Valid values range from 20h to D0h

(128 to 832 KBytes). For more information about the motion

threshold, see Section 3.6.

Byte 05 - Gap Threshold

The Gap Threshold byte specifies the maximum number of

consecutive gap blocks that the CTS will write on the current track

while determining whether an empty buffer exists during a buffered

write operation.

After writing the number of gap blocks specified by this byte, the CTS

will either continue the write operation (if there is new data in the

buffer) or begin the process to stop tape motion (if the buffer is still

empty). Before actually stopping tape motion, the CTS writes

additional gap blocks to complete the current track and then writes a

complete gap track.

Valid values for the Gap Threshold byte are 00h to FFh. Any value

greater than 07h is treated as 07h by the CTS. The default value for the

Gap Threshold byte is 07h.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-55

10 MODE SELECT (15h) andMODE SENSE (1Ah)

1 2 ... 206 207 208 209 210 211 212 213 214 215 216 ... 445 446

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