Hitachi HTS421210H9AT00, Specifications

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Travelstar 4K120 Hard Disk Drive Specification
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13.40 Standby (E2h/96h)
Table 133: Standby (E2h/96h)
The Standby command causes the device to enter the Standby Mode immediately and to set the auto power down
time-out parameter (standby timer).
When this command is issued, the device confirms the completion of the cached write commands before it asserts
the INTRQ. Following the INTRQ the interface remains active and the device is spun down. If the device is
already spun down, the spin down sequence is not executed.
During the Standby mode the device will respond to commands, however there will be a delay while waiting for
the spindle to reach operating speed.
The timer starts counting down when the device returns to Idle mode.
Output parameters to the device
Sector Count The Time-out Parameter. If it is zero, the time-out interval (Standby Timer) is disabled. If it is other
than zero the time-out interval is set for (Time-out Parameter × 5) seconds.
When the automatic power down sequence is enabled, the device will enter the Standby mode
automatically if the time-out interval expires with no device access from the host. The time-out
interval will be reinitialized if there is a device access before the time-out interval expires.
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 - - - - - - - - Data - - - - - - - -
Feature - - - - - - - - Error see below
Sector Count V V V V V V V V Sector Count - - - - - - - -
LBA Low - - - - - - - - LBA Low - - - - - - - -
LBA Mid - - - - - - - - LBA Mid - - - - - - - -
LBA High - - - - - - - - LBA High - - - - - - - -
Device - - - D - - - - Device - - - - - - - -
Command 1 1 1 0 0 0 1 0 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
0 0 0 0 0 V 0 0 0 V 0 V - 0 - V