Hitachi 100GB 7200 RPM HTE721010G9SA00 Benutzerhandbuch
Produktcode
HTE721010G9SA00
Travelstar E7K100 (Serial ATA) Hard Disk Drive Specification
52
10.6.6 Interface capability for power modes
Each power mode affects the physical interface as defined in the following table:
Ready (RDY) is not a power condition. A device may post ready at the interface even though the media may not be
accessible.
accessible.
10.6.7 Initial Power Mode at Power On
After power on or hard reset the device goes to IDLE mode or STANDBY mode depending on the option. Refer to
section 4.4.3 “Operating modes” on page 16 for the initial power mode selection.
section 4.4.3 “Operating modes” on page 16 for the initial power mode selection.
.
10.7 Interface Power Management Mode (Slumber and Partial)
Interface Power Management Mode is supported by both Device-initiated interface power management and Host-
initiated interface power management. Please refer to the Serial ATA Specification about Power Management
Mode.
initiated interface power management. Please refer to the Serial ATA Specification about Power Management
Mode.
10.8 S.M.A.R.T. Function
The intent of Self-monitoring, analysis, and reporting technology (S.M.A.R.T.) is to protect user data and prevent
unscheduled system downtime that may be caused by predictable degradation and/or fault of the device. By
monitoring and storing critical performance and calibration parameters, S.M.A.R.T. devices employ sophisticated
data analysis algorithms to predict the likelihood of near-term degradation or fault condition. By alerting the host
system of a negative reliability status condition, the host system can warn the user of the impending risk of a data
loss and advise the user of appropriate action.
unscheduled system downtime that may be caused by predictable degradation and/or fault of the device. By
monitoring and storing critical performance and calibration parameters, S.M.A.R.T. devices employ sophisticated
data analysis algorithms to predict the likelihood of near-term degradation or fault condition. By alerting the host
system of a negative reliability status condition, the host system can warn the user of the impending risk of a data
loss and advise the user of appropriate action.
Since S.M.A.R.T. utilizes the internal device microprocessor and other device resources, there may be some small
overhead associated with its operation. However, special care has been taken in the design of the S.M.A.R.T.
algorithms to minimize the impact to host system performance. Actual impact of S.M.A.R.T. overhead is dependent
on the specific device design and the usage patterns of the host system. To further ensure minimal impact to the user,
S.M.A.R.T. capable devices are shipped from the device manufacturer's factory with the S.M.A.R.T. feature
disabled. S.M.A.R.T. capable devices can be enabled by the system OEMs at time of system integration or in the
field by after-market products.
overhead associated with its operation. However, special care has been taken in the design of the S.M.A.R.T.
algorithms to minimize the impact to host system performance. Actual impact of S.M.A.R.T. overhead is dependent
on the specific device design and the usage patterns of the host system. To further ensure minimal impact to the user,
S.M.A.R.T. capable devices are shipped from the device manufacturer's factory with the S.M.A.R.T. feature
disabled. S.M.A.R.T. capable devices can be enabled by the system OEMs at time of system integration or in the
field by after-market products.
10.8.1 Attributes
Attributes are the specific performance or calibration parameters that are used in analyzing the status of the device.
Attributes are selected by the device manufacturer based on that attribute's ability to contribute to the prediction of
degrading or faulty conditions for that particular device. The specific set of attributes being used and the identity of
these attributes is vendor specific and proprietary.
Attributes are selected by the device manufacturer based on that attribute's ability to contribute to the prediction of
degrading or faulty conditions for that particular device. The specific set of attributes being used and the identity of
these attributes is vendor specific and proprietary.
Table 31: Power conditions
Mode
BSY
RDY
Interface active
Media
Active
x
x
Yes
Active
Idle
o
1
Yes
Active
Standby
o
1
Yes
Inactive
Sleep
x
x
No
Inactive