36
ST1.2 Series Product Manual, Rev. B
Note.
At power-on, or after a hardware or software reset, the default values of the features are as indi-
cated above.
69
H
NOP- Accepted for backward compatibility
Yes
Yes
81
H
Disable 8 bit transfer; Only in True IDE mode
No
Yes
82
H
Disable write cache.
(default)
Yes
Yes
85
H
Disable Advanced Power Management
Yes
Yes
8A
H
Disable Power Level 1 Commands
Yes
Yes
96
H
NOP- Accepted for backward compatibility
Yes
Yes
97
H
Accepted for backward compatibility
Yes
Yes
9A
H
It's NOP for backward compatibility
Yes
Yes
AA
H
Enable read look-ahead (read cache) feature
(default).
Yes
Yes
BB
H
4 Bytes of ECC apply on Read/Write Long Command
Yes
Yes
CC
H
Enable Power On Reset (POR) establishment of defaults at soft reset
Yes
Yes
D0
H
Seagate Unique; Disable Reassignment
Yes
Yes
D1
H
Seagate Unique; Enable Reassignment
Yes
Yes
Table 11:
Features register values
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