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5-66 Maxtor Atlas 10K V
Table 5-92 Mode Parameter Header and Block Descriptor-Field Descriptions
5.14.1 Read-Only Mode Pages
Table 5-93 lists read-only mode pages. Table 5-49 lists initiator-changeable mode pages.
Table 5-93 Read-Only Mode Pages
5.14.2 Format Device Page (03h)
The Format Drive Page (Table 5-94) describes the drive's medium format.
The data fields are described in Table 5-95. Note that the page is savable but no
parameters are changeable.
Table 5-94 Format Device Page-(Page 3)
Data Field Description
Mode Data Length Length of the returned data
Medium Type Always zero (0)
Device-Specific
Parameter
Bit 7 - This bit is set if the drive is write protected
Bit 4 - This bit is always set to indicate that the drive supports cache memory.
Block Descriptor
Zero (0) if Block Descriptor (DBD) in MODE SENSE Command Descriptor Length sector is 0.
If DBD is 1, then the Block Descriptor Length is eight (8).
Number of Blocks The value in this field specifies the number of logical blocks on the unit that are affected by the
current MODE SELECT command. When this field = 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-accessible logical blocks to
the amount specified.
Block Length The value in this field specifies the length, in bytes, of each block.
Page Code (Sub Page) Page Name Reports the drive's Size (bytes)
03h Format Device Medium format 24
04h Rigid Disk Geometry
Total cylinder head and
rotational speed
24
Bit
Byte
765 4 3210
0 PS Rsvd Page Code (03h)
1 Page Length (16h)
2 - 3 Tracks Per Zone
4 - 5 Alternate Sectors/Zone
6 - 7 Alternate Tracks/Zone
8 - 9 Alternate Tracks/Logical Unit
10 - 11 Sectors/Track
12 - 13 Data Bytes/Physical Sector
14 - 15 Interleave
16 - 17 Track Skew Factor
18 - 19 Cylinder Skew Factor
20 SSEC HSEC RMB SURF Reserved