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12.71 Write Multiple Ext (39h)
The Write Multiple Ext command transfers one or more sectors from the host to the device, and then the data is
written to the disk media.
Command execution is identical to the Write Sector(s) Ext command except that an interrupt is generated for each
block (as defined by the Set Multiple command) instead of for each sector. The sectors are transferred through the
Data Register 16 bits at a time
Table 260 Write Multiple Ext Command (39h)
Command Input
Field
Description
FEATURE
Reserved
COUNT
The number of logical sectors to be transferred. A value of 0000h
indicates that 65,536 logical sectors are to be transferred
LBA
LBA of first logical sector to be transferred
DEVICE
Bit Description
7 Obsolete
6 Shall be set to one
5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 39h
Normal Outputs
See Normal Outputs in Section 12.8 Flush Cache Ext (EAh)
Error Outputs
See Error Outputs in Section 12.65 Write DMA FUA Ext (3Dh)
340
Hard Disk Drive Specification