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Seagate ST94019A Momentus 4200 Product Manual - Page 35

Set Features command, Note., Table 8, Features register values

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4.1.3 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: Table 8: Features register values 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 0AH PIO mode 2 0BH PIO mode 3 0CH PIO mode 4 (default) 20H Multiword DMA mode 0 21H Multiword DMA mode 1 22H Multiword DMA mode 2 40H Ultra DMA mode 0 41H Ultra DMA mode 1 42H Ultra DMA mode 2 43H Ultra DMA mode 3 44H Ultra DMA mode 4 45H Ultra DMA mode 5 05H Enable advanced power management 55H Disable read look-ahead (read cache) feature. 82H Disable write cache. AAH Enable read look-ahead (read cache) feature (default). F1H Report full capacity available Note. At power-on, or after a hardware or software reset, the default values of the features are as indicated above. Momentus 42 Product Manual, Rev. A 25

Section	Page
1.0 Introduction 1	7
2.0 Drive specifications 3	7
2.1 Specification summary 3	7
2.2 Formatted capacity 5	7
2.3 Default logical geometry 5	7
2.4 Physical organization 5	7
2.5 Recording and interface technology 6	7
2.6 Physical characteristics 6	7
2.7 Seek time 7	7
2.8 Time to ready 7	7
2.9 Power specifications 8	7
2.9.1 Power consumption 8	7
2.9.2 Conducted noise 9	7
2.9.3 Voltage tolerance 9	7
2.9.4 Power-management modes 10	7
2.10 Environmental specifications 11	7
2.10.1 Ambient temperature 11	7
2.10.2 Temperature gradient 11	7
2.10.3 Humidity 11	7
2.10.4 Altitude 11	7
2.10.5 Shock 12	7
2.10.6 Vibration 12	7
2.11 Acoustics 13	7
2.12 Electromagnetic immunity 13	7
2.13 Reliability 14	7
2.14 Agency certification 14	7
2.14.1 Safety certification 14	7
2.14.2 Electromagnetic compatibility 14	7
2.14.3 FCC verification 15	7
3.0 Configuring and mounting the drive 17	7
3.1 Handling and static discharge precautions 17	7
3.2 Jumper settings 17	7
3.2.1 Master/slave configuration 17	7
3.2.2 Cable-select option 18	7
3.3 Drive mounting 18	7
4.0 ATA interface 19	7
4.1 ATA interface signals and connector pins 19	7
4.1.1 Supported ATA commands 20	7
4.1.2 Identify Device command 22	7
4.1.3 Set Features command 25	7
4.1.4 S.M.A.R.T. commands 26	7
5.0 Seagate Technology support services 27	7
Figure 1. Momentus 42 disc drive 1	9
Figure 2. Typical 5V startup and operation current profile 9	9
Figure 3. Jumper settings 17	9
Figure 4. Mounting dimensions-top, side and end view 18	9
1.0 Introduction	11
2.0 Drive specifications	13
2.1 Specification summary	13
2.2 Formatted capacity	15
2.3 Default logical geometry	15
2.4 Physical organization	15
2.5 Recording and interface technology	16
2.6 Physical characteristics	16
2.7 Seek time	17
2.8 Time to ready	17
2.9 Power specifications	18
2.9.1 Power consumption	18
2.9.1.1 Typical current profile	19
2.9.2 Conducted noise	19
2.9.3 Voltage tolerance	19
2.9.4 Power-management modes	20
2.10 Environmental specifications	21
2.10.1 Ambient temperature	21
2.10.2 Temperature gradient	21
2.10.3 Humidity	21
2.10.3.1 Relative humidity	21
2.10.3.2 Wet bulb temperature	21
2.10.4 Altitude	21
2.10.5 Shock	22
2.10.5.1 Operating shock	22
2.10.5.2 Nonoperating shock	22
2.10.6 Vibration	22
2.10.6.1 Operating vibration	22
2.10.6.2 Nonoperating vibration	22
2.11 Acoustics	23
2.12 Electromagnetic immunity	23
2.13 Reliability	24
2.14 Agency certification	24
2.14.1 Safety certification	24
2.14.2 Electromagnetic compatibility	24
2.14.3 FCC verification	25
3.0 Configuring and mounting the drive	27
3.1 Handling and static discharge precautions	27
3.2 Jumper settings	27
3.2.1 Master/slave configuration	27
3.2.2 Cable-select option	28
3.3 Drive mounting	28
4.0 ATA interface	29
4.1 ATA interface signals and connector pins	29
4.1.1 Supported ATA commands	30
4.1.2 Identify Device command	32
4.1.3 Set Features command	35
4.1.4 S.M.A.R.T. commands	36
5.0 Seagate Technology support services	37
Index	43
Numerics	43
A	43
B	43
C	43
D	43
E	43
F	43
G	43
H	43
I	43
J	44
K	44
L	44
M	44
N	44
O	44
P	44
R	44
S	44
T	45
U	45
V	45