Maxtor Atlas 10K V 5-145
5.41 SYNCHRONIZE CACHE Command (35h)
The SYNCHRONIZE CACHE command ensures that all logical blocks, within the
specified range in the drive's cache memory, have their most recent data value
recorded on the physical medium. If more recent data for a logical block, within the
specified range, exists in the cache memory than on the physical medium, then the
logical blocks from the cache memory is written to the physical medium. Logical
blocks are not necessarily removed from the cache as a result of the Synchronize Cache
operation. The data format and field descriptions are shown in Table 5-201 and Table
5-202 respectively.
Table 5-201 SYNCHRONIZE CACHE Command Descriptor Block-Data Format
Table 5-202 SYNCHRONIZE CACHE Command-Field Descriptions
Bit
Byte
76543210
0 Operation Code (35h)
1 Reserved Immed
= 0
RelAdr
2 - 5 Logical Block Address
6 Reserved
7 - 8 Number of Blocks
9 Control
Field Description
Immed
Immediate. Must be 0. The drive returns status after the synchronize cache operation has
been completed.
RelAdr Relative Address. Must be 0. Relative addressing is not supported.
Logical Block
Address
The address of the first logical sector of the range to be operated upon by this command.
Number of
Blocks
Specifies the total number of contiguous logical blocks within the range. When set to 0,
the drive removes all sectors from the given Logical Block Address on.
When Number of Blocks and Logical Block Address are both 0, the drive removes all un-
written cache sectors to the medium.
It is not considered an error when no sectors within the specified range are in the cache
memory.
