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Byte 04, Bits 4 and 3 - PSUM (Partition Size Unit of Measure)

If you set IDP (Initiator Defined Partitions) to 1 and are defining

additional partitions (Additional Partitions Defined = 01h), use the

PSUM field to indicate the units you are using to specify the size of

the additional partition. The valid values for PSUM are as follows:

00b – The partition size is specified in bytes.

01b – The partition size is specified in KBytes.

10b – The partition size is specified in MBytes. (A value of 10b is

always returned in the MODE SENSE data.)

Notes:

If you specify the partition size in bytes, the EXB-8505

automatically sets the value to 1 MByte. If you specify the

partition size in KBytes, the EXB-8505 rounds the value down to

the nearest MByte. (If the result is 0, the value is automatically set

to 1 MByte.)

It is illegal to set the PSUM field to 11b.

For the long form, if you are not using the Partition Size field to

specify the partition size (that is, FDP=0, SDP=1, and IDP=0), the

EXB-8505 ignores the PSUM field.

When Additional Partitions Defined is 00h, the PSUM field is

ignored in the MODE SELECT command.

Byte 05 - Medium Format Recognition

The Medium Format Recognition byte indicates the EXB-8505’s ability

to recognize the medium format and partition information when an

unknown tape is loaded. The value returned for this field in the

MODE SENSE data is 03h, indicating that the EXB-8505 can recognize

both format and partition information. This field is ignored by the

EXB-8505 in the MODE SELECT command.

May 1994 EXB-8205 and EXB-8505

(Standard and XL)

10-49

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

1 2 ... 200 201 202 203 204 205 206 207 208 209 210 ... 445 446

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