Product manual

SCSI Description
Maxtor Atlas 10K IV 5-41
Table 5-58 Mode Parameter Block Descriptor-Field Descriptions
5.14.4 Categories of Changeable Pages
The drive’s changeable pages are described on the following pages. The data fields
for each of these pages fall into one of the categories described in Table 5-59.
Table 5-59 Categories of Changeable Pages
5.14.5 Unit Attention Condition Page (00h)
The Unit Attention Page is used to enable or disable the generation of Unit Attention
Conditions. The Unit Attention Condition Page format and field descriptions are
described in Table 5-60 and Table 5-61 respectively.
Table 5-60 Unit Attention Condition Page (Page 0)
Field Description
Number of Blocks
This field specifies the number of logical blocks on the unit that are affected by the cur-
rent MODE SELECT command.
When this field is 0, the MODE SELECT parameters are put into effect for all logical
blocks on the unit.
The maximum value allowed is the total number of initiator-addressable logical blocks
for the value specified in the Block Length field.
A value that is less than the maximum value will decrease the number of initiator-acces-
sible logical blocks to the amount specified.
Block Length This field specifies the length, in bytes, of each logical sector.
Category Description
Fully Supported
A field in this category can be modified by the MODE SELECT command, can be saved and can
affect the drives processing. The drive uses the value in the field and, if the SP bit is set, preserves
the new value of the field in non-volatile memory on the drive. (The PS bit must have been set
when the mode page was returned with a MODE SENSE command.)
Ignored
A value in this field is never used or validated; it is never looked at by the drive. Ignored fields are
not underlined in the Mode Parameter Pages’ figures or tables and are not described in the Field
Description tables.
Bit
Byte
765 4 3210
0 PS Rsvd Page Code (00h)
1 Page Length (02h)
2 Reserved DUA Reserved
3 Reserved (00h)