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12.28 Read Sector(s) Ext (24h)
The Read Sector(s) Ext command reads from 1 to 65,536 sectors of data from disk media, and then transfers the
data from the device to the host.
The sectors are transferred through the Data Register 16 bits at a time.
If an uncorrectable error occurs, the read will be terminated at the failing sector.
Table 174 Read Sector(s) Ext Command (24h)
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 24h
Normal Outputs
See Normal Outputs in Section 12.8 Flush Cache Ext (EAh)
Error Outputs
See Error Outputs in Section 12.24 Read Multiple Ext (29h)
240
Hard Disk Drive Specification