Deskstar 7K250 Hard Disk Drive Specification
73
10.0 General operation
10.1 Reset response
ATA has the following three types of resets:
The actions of each reset are shown in the table below.
O – execute
X – does not execute
Notes:
Power On Reset (POR)
The device executes a series of electrical circuitry diagnostics, spins up the
head disk assembly, tests speed and other mechanical parametric, and sets
default values.
Hard Reset (Hardware Reset)
The RESET- signal is negated in the ATA Bus. The device resets the interface
circuitry and sets the default values.
Soft Reset (Software Reset)
The SRST bit in the Device Control Register is set and then is reset. The device
resets the interface circuitry according to the Set Features requirement.
Table 42: Reset response table
POR
hard reset
soft reset
Aborting Host interface
-
O
O
Aborting Device operation
-
(*1)
(*1)
Initialization of hardware
O
X
X
Internal diagnostic
O
X
X
Spinning spindle
O
X
X
Initialization of registers (*2)
O
O
O
DASP handshake
O
O
X
PDIAG handshake
O
O
O
Reverting programmed parameters to default
Number of CHS (set by Initialize
Device Parameters)
Multiple mode
Write Cache
Read look-ahead
ECC bytes
O
(*3)
(*3)
Power mode
(*5)
(*4)
(*4)
Disable Standby timer(*5)
O
X
X
(*1)
Execute after the data in write cache has been written.
(*2)
The default value on POR is shown in Table 43: “Default Register Values” on page 74.
(*3)
The Set Features command with Feature register = CCh enables the device to revert these parameters to the
power on defaults.
(*4)
In the case of Sleep mode, the device goes to Standby mode. In other cases, the device does not change current
mode.
(*5)
Idle when Power-Up in Standby feature set is disabled. Standby when Power-Up in Standby feature set is
enabled.
Содержание Deskstar 7K250
Страница 2: ......
Страница 18: ...Deskstar 7K250 Hard Disk Drive Specification 4 ...
Страница 20: ...Deskstar 7K250 Hard Disk Drive Specification 6 ...
Страница 21: ...Deskstar 7K250 Hard Disk Drive specification 7 Part 1 Functional specification ...
Страница 22: ...Deskstar 7K250 Hard Disk Drive Specification 8 ...
Страница 24: ...Deskstar 7K250 Hard Disk Drive Specification 10 ...
Страница 36: ...Deskstar 7K250 Hard Disk Drive Specification 22 ...
Страница 56: ...Deskstar 7K250 Hard Disk Drive Specification 42 ...
Страница 75: ...Deskstar 7K250 Hard Disk Drive Specification 61 Part 2 Interface specification ...
Страница 76: ...Deskstar 7K250 Hard Disk Drive Specification 62 ...
Страница 78: ...Deskstar 7K250 Hard Disk Drive Specification 64 ...
Страница 86: ...Deskstar 7K250 Hard Disk Drive Specification 72 ...
Страница 112: ...Deskstar 7K250 Hard Disk Drive Specification 98 ...