Function Set (B0H) - IBM DBCA-204860 - Travelstar 4.8 GB Hard Drive Specifications

12.30 S.M.A.R.T. Function Set (B0h)
C o m m a n d B l o c k O u t p u t R e g i s t e r s
R e g i s t e r
D a t a
F e a t u r e
S e c t o r C o u n t
S e c t o r N u m b e r
C y l i n d e r L o w
C y l i n d e r H i g h
D e v i c e / H e a d
C o m m a n d
E r r o r R e g i s t e r
7 6 5
C R C U N C 0 I D N
0 0 0
Figure 99. S.M.A.R.T. Function Set Command (B0h)
The S.M.A.R.T. Function Set command provides access to Attribute Values, Attribute Thresholds and
other low level subcommands that can be used for logging and reporting purposes and to accommodate
special user needs. The S.M.A.R.T. Function Set command has several separate subcommands which are
selectable via the device's Features Register when the S.M.A.R.T. Function Set command is issued by the
host.
In order to select a subcommand the host must write the subcommand code to the device's Features Reg-
ister before issuing the S.M.A.R.T. Function Set command. The subcommands and their respective codes
are listed below.
Code Subcommand
D0h SMART Read Attribute Values
D1h SMART Read Attribute Thresholds
D2h SMART Enable/disable Attribute Autosave
D3h SMART Save Attribute Values
D4h SMART Execute Off-line Immediate
D8h SMART Enable Operations
D9h SMART Disable Operations
7 6 5 4 3 2 1 0
V V V V V V V V
V V V V V V V V
0 1 0 0 1 1 1 1
1 1 0 0 0 0 1 0
1 1 D
1 0 1 1 0 0 0 0
4 3 2 1 0
0 A B T T 0 N A M N
0 0 V 0 0
C o m m a n d B l o c k I n p u t R e g i s t e r s
R e g i s t e r 7 6 5 4 3 2 1 0
D a t a
E r r o r . . . S e e B e l o w . . .
S e c t o r C o u n t
S e c t o r N u m b e r
C y l i n d e r L o w
C y l i n d e r H i g h
D e v i c e / H e a d
S t a t u s . . . S e e B e l o w . . .
S t a t u s R e g i s t e r
7 6 5 4 3
B S Y R D Y D F D S C D R Q C O R I D X E R R
0 V 0 V
Command Descriptions
2 1 0
0 V
147