Seagate Medalist 1640, Руководство по эксплуатации продукта

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Word Description Value
67
Minimum PIO
transfer without
IORDY 180 nsec
68
Minimum PIO
transfer with IORDY 120 nsec
69--127
Reserved xxxx
H
128--159
Seagate-reserved xxxx
H
160-- 255
Reserved xxxx
H
3.2.2 Set Features command (EF
H
)
The Set Features command (command code EF
H
) allows the user to
enable and disable the multisegmented cache features and to identify
the transfer modes the drive uses. The multisegmented buffer consists
of Read look-ahead and write-immediate and write-merging features.
The table below lists the features the drives support. The features that
are set to default by the factory are indicated in the Feature column.
Feature Value Feature
02
H
Enable write cache (default)
03
H
Set transfer mode
04
H
Enable Read Auto Relocation (default)
44
H
Uses 22 bytes of ECC on read long and write long
commands
55
H
Disable read look ahead cache
82
H
Disable write cache
84
H
Disable Read Auto Relocation
AA
H
Enable read look-ahead (default)
BB
H
Uses 4 bytes of ECC on read long and write long
commands (default)
Medalist 1640 and 2140 Product Manual, January 1996 31