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6.26 S.M.A.R.T. (B0h)
The intent of self-monitoring, analysis, and reporting technology (the SMART feature set) is to protect user data
and minimize the likelihood of 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, SMART
feature set devices attempt to predict the likelihood of near-term degradation or fault condition. Providing the host
system the knowledge of a negative reliability condition allows the host system to warn the user of the impending
risk of a data loss and advise the user of appropriate action. Support of this feature set is indicated in the
IDENTIFY DEVICE data (Word 82 bit 0).
Table 50: S.M.A.R.T. Features
Task File Register
7
6
5
4
3
2
1
0
COMMAND
B0h
DRIVE/HEAD
1
1
1
D
nu
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
C2h
4Fh
nu
XXh
Feature
Details of S.M.A.R.T. features are described in Section 7.
6.27 Standby (96h or E2)
This command causes the Drive to set BSY, enter the Sleep mode (which corresponds to the ATA ‘Standby’ Mode),
clear BSY and return the interrupt immediately. Recovery from Sleep mode is accomplished by issuing another
command. Table 51 defines the Standby command Byte sequence.
Table 51: Standby
Task File Register
7
6
5
4
3
2
1
0
COMMAND
96h or E2h
DRIVE/HEAD
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
D
nu
nu
nu
nu
nu
nu
6.28 Standby Immediate (94h or E0h)
This command causes the Drive to set BSY, enter the Sleep mode (which corresponds to the ATA Standby Mode),
clear BSY and return the interrupt immediately.
Recovery from Sleep mode is accomplished by issuing another command. Table 52 defines the Standby
Immediate Byte sequence.
Table 52: Standby Immediate
Task File Register
7
6
5
4
3
2
1
0
COMMAND
94h or E0h
DRIVE/HEAD
CYLINDER HI
CYLINDER LOW
SECTOR NUM
SECTOR COUNT
FEATURES
nu
D
nu
nu
nu
nu
nu
nu
Swissbit AG
Industriestrasse 4-8
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.2
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
X-200_data_sheet_SA-QxBR_Rev12.doc
Page 31 of 47
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