Fujitsu MHZ2250BJ Manuel d'utilisateur télécharger pdf (Page 122)

Interface

• Unload Feature (Unload Immediate Command):

When the device received the IDLE IMMEDIATE command with the UNLOAD

FEATURE, the head(s) is unloaded to the ramp position. After the device

completed the unload operation, the INTRQ signal will be asserted and the BUSY

flag will be cleared. The time until the head(s) unload to the ramp position is

typically less than 500 milliseconds. This unload operation is not same as the

power management operation. The device just unloads the head(s), and not

executes the power consumption restraint operation. This unload operation effects

the normal (not emergency) load/unload guarantee count per the device life.

Even if the device executes reading look-ahead operation or executes writing

operation, the device unloads the head(s) to the ramp position as soon as possible

when received the IDLE IMMEDIATE command with the Unload Feature. When

the writing operation is stopped, the device keeps the unwritten data. And, the

device keeps the unloaded state until receiving a Soft Reset/ COMRESET, or a

new command except IDLE IMMEDIATE command with the Unload Feature.

At command issuance (Shadow Block Registers setting contents)

CM X 'E1'

DH x x x x xx

X '55'

X '4E'

X '4C'

X '44'

At command completion (Shadow Block Registers contents to be read)

ST Status information

DH x x x x xx

X 'C4'

Error information

5-48 C141-E280

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 319 320

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Fujitsu MHZ2250BJ Manuel d'utilisateur Page 122