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Travelstar 7K100 Hard Disk Drive Specification
156
Note 1. When the Feature register is 03h (= Set Transfer mode) the Sector Count Register specifies the transfer
mechanism. The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.
When the Feature Register is 05h (=Enable Advanced Power Management) the Sector Count Register specifies the
Advanced Power Management level.
Note 2.
If the number of auto reassigned sectors reaches the device's reassignment capacity, the write cache func-
tion will be automatically disabled. Although the device still accepts the Set Features command (with Feature reg-
ister = 02h) without error, the write cache function will remain disabled. For the current write cache function status,
refer to the Identify Device Information (129 word) by the Identify Device command.
Hard reset or power off must not be done during the first 5 seconds after write command completion when write
cache is enabled.
Note 3.
When the Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving
mode becomes Active Idle.
86H
Disable Power-Up in Standby feature set
89H
Disable Address Offset mode
AAH
Enable read look-ahead feature
BBH
4 bytes of ECC apply on Read Long/Write Long commands
C2H
Disable Automatic Acoustic Management feature set
CCH
Enable reverting to power on defaults
bits (7:3)
bits (2:0)
PIO Default Transfer Mode
00000
000
PIO Default Transfer Mode, Disable IORDY
00000
001
PIO Flow Control Transfer Mode X
00001 nnn
(nnn=000,001,010,011,100)
Multiword DMA mode x
00100
nnn
(nnn=000,001,010,011,100)
Ultra DMA mode x
01000
nnn
(nnn=000,001,010,011,100,101)
C0h-FEh
The deepest Power Saving Mode is Active Idle
80h-BFh
The deepest Power Saving Mode is Low Power Idle
01h-7Fh
The deepest Power Saving Mode is Standby
00h, FFh
Aborted
Summary of Contents for HTS721010G9AT00
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