IBM DTCA-24090 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 Performa : The device is capable of responding immediately to nce idle media access requests. All electronic components remain powered and full frequency servo remains operational. Active 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. The head is parked near the mid diameter of disk without servoing. A device in Active idle mode may take longer to complete the execution of a command because it has to activate that circuitry. Low power : Head is unloaded on the ramp position. idle Spindle motor is rotating at full speed. 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 becomes 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. Figure 11. Operating Mode 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
Performa
:
The device is capable of responding immediately to
nce idle
media access requests. All electronic components
remain powered and full frequency servo remains
operational.
Active
:
The device is capable of responding immediately to
idle
media access requests. Some circuitry including servo
system and R/W electronics are in power saving mode.
The head is parked near the mid diameter of disk
without servoing.
A device in Active idle mode may take longer to complete
the execution of a command because it has to activate
that circuitry.
Low power :
Head is unloaded on the ramp position.
idle
Spindle motor is rotating at full speed.
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
becomes 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.
Figure 11. Operating Mode
Drive Characteristics
13