HP Pavilion xe700 HP Pavilion PC's - (English) Seagate Hard Drive U Series 5 M - Page 36

Set Features command

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U Series 5 Family Product Manual, Rev. B 29 3 Ultra DMA mode 3 is supported. 4 Ultra DMA mode 4 is supported. 8 Ultra DMA mode 0 is currently active. 9 Ultra DMA mode 1 is currently active. 10 Ultra DMA mode 2 is currently active. 11 Ultra DMA mode 3 is currently active. 12 Ultra DMA mode 4 is currently active. 13 Ultra DMA mode 5 is currently active. Bit Word 93 13 1 = 80-conductor cable detected, CBLID above VIH 0 = 40-conductor cable detected, CBLID below VIL Bit Word 94 0-7 Current AAM setting 8-15 AAM Power on default 3.1.3 Set Features command This command controls the implementation of various features that the drive supports. When the drive receives this command, it sets BSY, checks the contents of the Features register, clears BSY and generates an interrupt. If the value in the register does not represent a feature that the drive supports, the command is aborted. Power-on default has the read look-ahead and write caching features enabled. The acceptable values for the Features register are defined as follows: 02H Enable write cache (default). 03H Set transfer mode (based on value in Sector Count register). Sector Count register values: 00H Set PIO mode to default (PIO mode 2). 01H Set PIO mode to default and disable IORDY (PIO mode 2). 08H PIO mode 0 09H PIO mode 1

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U Series 5 Family Product Manual, Rev. B
29
3.1.3
Set Features command
This command controls the implementation of various features that the
drive supports. When the drive receives this command, it sets BSY,
checks the contents of the Features register, clears BSY and generates
an interrupt. If the value in the register does not represent a feature that
the drive supports, the command is aborted. Power-on default has the
read look-ahead and write caching features enabled. The acceptable
values for the Features register are defined as follows:
3
Ultra DMA mode 3 is supported.
4
Ultra DMA mode 4 is supported.
8
Ultra DMA mode 0 is currently active.
9
Ultra DMA mode 1 is currently active.
10
Ultra DMA mode 2 is currently active.
11
Ultra DMA mode 3 is currently active.
12
Ultra DMA mode 4 is currently active.
13
Ultra DMA mode 5 is currently active.
Bit
Word 93
13
1 = 80-conductor cable detected, CBLID above V
IH
0 = 40-conductor cable detected, CBLID below V
IL
Bit
Word 94
0–7
Current AAM setting
8–15
AAM Power on default
02
H
Enable write cache
(default).
03
H
Set transfer mode (based on value in Sector Count register).
Sector Count register values:
00
H
Set PIO mode to default (PIO mode 2).
01
H
Set PIO mode to default and disable IORDY
(PIO mode 2).
08
H
PIO mode 0
09
H
PIO mode 1