IBM DTNA-22160 Hard Drive Specifications - Page 21

Operating Modes.

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3.3.7 Operating Modes. Operating mode Description Spin Up : Start up time period from spindle stop or power down. Seek : Seek operation mode Write : Write operation mode Read : Read operation mode Active : The device is capable of responding immediately to media access requests, and commands complete execution in the shortest possible time. Idle : The device is capable of responding immediately to media access requests. Some circuitry including servo system and R/W electronics are in power saving mode. A device in Idle mode may take longer to complete the execution of a command because it have to activate those circuitry. Standby : The device interface is capable of accepting commands. Spindle motor is stopped. All circuitry except host interface are in power saving mode. The execution of commands is delayed until spindle become ready. Sleep : The device requires a soft reset or a hard reset to be activated. All electronics including spindle motor and host interface are shut off. Note 1 : Upon power down or Spindle stopped, a head locking mechanism will secure the heads in the ID parking position. Figure 11. Operating Mode 3.3.7.1 Mode Transition Time. From Standby To Idle Figure 12. Mode Transition Time Transition Time 2.8 sec typ, 9.5 sec max. Drive Characteristics 13

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3.3.7
Operating Modes.
Operating mode
Description
Spin Up
:
Start up time period from spindle stop or power down.
Seek
:
Seek operation mode
Write
:
Write operation mode
Read
:
Read operation mode
Active
:
The device is capable of responding immediately to
media access requests, and commands complete execution
in the shortest possible time.
Idle
:
The device is capable of responding immediately to
media access requests. Some circuitry including servo
system and R/W electronics are in power saving mode.
A device in Idle mode may take longer to complete the
execution of a command because it have to activate
those circuitry.
Standby
:
The device interface is capable of accepting commands.
Spindle motor is stopped. All circuitry except host
interface are in power saving mode.
The execution of commands is delayed until spindle
become ready.
Sleep
:
The device requires a soft reset or a hard reset to
be activated.
All electronics including spindle motor and host
interface are shut off.
Note 1 : Upon power down or Spindle stopped, a head locking mechanism will
secure the heads in the ID parking position.
Figure 11. Operating Mode
3.3.7.1
Mode Transition Time.
From
To
Transition Time
Standby
Idle
2.8 sec typ,
9.5 sec max.
Figure 12. Mode Transition Time
Drive Characteristics
13