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7K200 SATA OEM Specification
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14.44 Write DMA Ext (35h)
Command Block Output Registers Command Block Input Registers
Register 7 6 5 4 3 2 1 0 Register 7 6 5 4 3 2 1 0
Data Low - - - - - - - - Data Low - - - - - - - -
Data High - - - - - - - - Data High - - - - - - - -
Current - - - - - - - - Error ...See Below... Feature
Previous - - - - - - - -
Current V V V V V V V V HOB=0 - - - - - - - -Sector Count
Previous V V V V V V V V
Sector Count
HOB=1 - - - - - - - -
Current V V V V V V V V HOB=0 V V V V V V V VLBA Low
Previous V V V V V V V V
LBA Low
HOB=1 V V V V V V V V
Current V V V V V V V V HOB=0 V V V V V V V VLBA Mid
Previous V V V V V V V V
LBA Mid
HOB=1 V V V V V V V V
Current V V V V V V V V HOB=0 V V V V V V V VLBA High
Previous V V V V V V V V
LBA High
HOB=1 V V V V V V V V
Device - 1 - - - - - - Device - - - - - - - -
Command 0 0 1 1 0 1 0 1 Status ...See Below...
Error Register Status Register
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
CRC UNC 0 IDN 0 ABT T0N AMN BSY RDY DF DSC DRQ COR IDX ERR
V 0 0 V 0 V 0 0 0 V 0 V - 0 0 V
Table 128 Write DMA Ext Command (35h)
The Write DMA Ext command transfers one or more sectors of data from the host to the device,
then the data is written to the disk media.
The sectors of data are transferred through the Data Register 16 bits at a time.
The host initializes a slave-DMA channel prior to issuing the command. Data transfers are
qualified by DMARQ and are performed by the slave-DMA channel. The device issues only one
interrupt per command to indicate that data transfer has terminated and status is available.
If an uncorrectable error occurs, the write will be terminated at the failing sector
Output Parameters To The Device
Sector Count Current
The number of continuous sectors to be transferred low order, bits (7:0).
Sector Count Previous
The number of continuous sectors to be transferred high order bits (15:8). If 0000h in
the Sector Count register is specified, then 65,536 sectors will be transferred.
LBA Low Current
LBA (7:0).
LBA Low Previous
LBA (31:24).
LBA Mid Current
LBA (15:8).
LBA Mid Previous
LBA (39:32).
LBA High Current
LBA (23:16).
LBA High Previous
LBA (47:40).
Input Parameters From The Device
LBA Low (HOB=0)
LBA (7:0) of the address of the first unrecoverable error.
LBA Low (HOB=1)
LBA (31:24) of the address of the first unrecoverable error.
LBA Mid (HOB=0)
LBA (15:8) of the address of the first unrecoverable error.
LBA Mid (HOB=1)
LBA (39:32) of the address of the first unrecoverable error.
LBA High (HOB=0)
LBA (23:16) of the address of the first unrecoverable error.
LBA High (HOB=1)
LBA (47:40) of the address of the first unrecoverable error.