Function Set (B0H); Figure 108. Sleep Command (E6H/99H) - IBM DJSA-210 - Travelstar 10 GB Hard Drive Specifications

13.31 Sleep (E6h/99h)
Command Block Output Registers
Register
Data
Feature
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Command
Error Register
7 6 5
CRC UNC 0
0 0 0

Figure 108. Sleep command (E6h/99h)

This command is the only way to cause the device to enter Sleep Mode.
When this command is issued, the device confirms the completion of the cached write commands before it
asserts INTRQ. Then the device is spun down, and the interface becomes inactive. The only way to
recover from Sleep Mode is with a software reset or a hardware reset.
The use of hardware reset to recover from Sleep Mode may be incompatible with continued operation of
the host system.
If the device is already spun down, the spin down sequence is not executed.
7 6 5 4 3 2 1 0
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
1 – 1 D – – – –
1 1 1 0 0 1 1 0
4 3 2 1 0
IDN 0 ABT T0N AMN
0 0 V 0 0
Travelstar 32GH/30GT/20GN hard disk drive specifications
Command Block Input Registers
Register
Data
Error
Sector Count
Sector Number
Cylinder Low
Cylinder High
Device/Head
Status
Status Register
7 6 5 4
BSY RDY DF DSC
0 V 0 V
158
7 6 5 4 3 2 1 0
– – – – – – – –
see below
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
– – – – – – – –
see below
3 2 1 0
DRQ COR IDX ERR
– 0 – V