Seagate ST3160022A Product Manual page 44

34
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:
02 Enable write cache (default).
H
03 Set transfer mode (based on value in Sector Count register).
H
Sector Count register values:
00 Set PIO mode to default (PIO mode 2).
H
01 Set PIO mode to default and disable IORDY (PIO mode 2).
H
08 PIO mode 0
H
09 PIO mode 1
H
0A PIO mode 2
H
0B PIO mode 3
H
0C PIO mode 4 (default)
H
20 Multiword DMA mode 0
H
21 Multiword DMA mode 1
H
22 Multiword DMA mode 2
H
40 Ultra DMA mode 0
H
41 Ultra DMA mode 1
H
42 Ultra DMA mode 2
H
43 Ultra DMA mode 3
H
44 Ultra DMA mode 4
H
45 Ultra DMA mode 5
H
55 Disable read look-ahead (read cache) feature.
H
82 Disable write cache.
H
AA Enable read look-ahead (read cache) feature (default).
H
F1 Report full capacity available
H
Note. At power-on, or after a hardware or software reset, the default values
of the features are as indicated above.
U Series 9 Product Manual, Rev. C