Seagate ST3250823AS Product Manual - Page 25

Barracuda 7200.8 Serial ATA Product Manual, Rev. D

17

2.9.5.2

Nonoperating shock

The nonoperating shock level that the drive can experience without incurring physical damage or degradation

in performance when subsequently put into operation is 300 Gs based on a nonrepetitive half-sine shock pulse

of 2 msec duration.

2.9.6

Vibration

All vibration specifications assume that the drive is mounted securely with the input vibration applied at the

drive mounting screws. Vibration may be applied in the X, Y or Z axis.

2.9.6.1

Operating vibration

The maximum vibration levels that the drive may experience while meeting the performance standards speci-

fied in this document are specified below.

2.9.6.2

Nonoperating vibration

The maximum nonoperating vibration levels that the drive may experience without incurring physical damage

or degradation in performance when subsequently put into operation are specified below.

2.10

Acoustics

Drive acoustics are measured as overall A-weighted acoustic sound power levels (no pure tones). All mea-

surements are consistent with ISO document 7779. Sound power measurements are taken under essentially

free-field conditions over a reflecting plane. For all tests, the drive is oriented with the cover facing upward.

Note.

For seek mode tests, the drive is placed in seek mode only. The number of seeks per second is

defined by the following equation:

(Number of seeks per second = 0.4 / (average latency + average access time)

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which

may increase acoustic and power to operational levels

.

5–22 Hz

Limited displacement

23–350 Hz

0.5 G acceleration

5–22 Hz

Limited displacement

23–350 Hz

5.0 Gs

Table 5:

Fluid Dynamic Bearing (FDB) motor acoustics

Acoustic mode

Idle*

Performance seek

2.8 bels (typ)

3.4 bels (max)

3.7 bels (typ)

3.9 bels (max)

Section	Page
1.0 Introduction	9
1.1 About the Serial ATA interface	10
2.0 Drive specifications	11
2.1 Specification summary tables	11
2.2 Formatted capacity	18
2.2.1 LBA mode	18
2.3 Default logical geometry	18
2.4 Recording and interface technology	19
2.5 Physical characteristics	19
2.6 Seek time	20
2.7 Start/stop times	20
2.8 Power specifications	21
2.8.1 Power consumption	21
2.8.1.1 Typical current profiles	22
2.8.2 Conducted noise	23
2.8.3 Voltage tolerance	23
2.8.4 Power-management modes	23
2.9 Environmental specifications	24
2.9.1 Ambient temperature	24
2.9.2 Temperature gradient	24
2.9.3 Humidity	24
2.9.3.1 Relative humidity	24
2.9.3.2 Wet bulb temperature	24
2.9.4 Altitude	24
2.9.5 Shock	24
2.9.5.1 Operating shock	24
2.9.5.2 Nonoperating shock	25
2.9.6 Vibration	25
2.9.6.1 Operating vibration	25
2.9.6.2 Nonoperating vibration	25
2.10 Acoustics	25
2.11 Electromagnetic immunity	26
2.12 Reliability	26
2.13 Agency certification	27
2.13.1 Safety certification	27
2.13.2 Electromagnetic compatibility	27
2.13.3 FCC verification	28
2.14 Environmental protection	29
2.15 Corrosive environment	29
3.0 Configuring and mounting the drive	31
3.1 Handling and static-discharge precautions	31
3.2 Configuring the drive	32
3.3 Serial ATA cables and connectors	32
3.4 Drive mounting	33
4.0 Serial ATA (SATA) interface	35
4.1 Hot-Plug compatibility	35
4.2 Serial ATA device plug connector pin definitions	36
4.3 Supported ATA commands	37
4.3.1 Identify Device command	39
4.3.2 Set Features command	42
4.3.3 S.M.A.R.T. commands	43
5.0 Seagate Technology support services	45
Index	51
A	51
B	51
C	51
D	51
E	51
F	51
G	51
H	52
I	52
K	52
L	52
M	52
N	52
O	52
P	52
Q	52
R	52
S	53
T	53
U	53
V	53

Seagate ST3250823AS Product Manual - Page 25

Nonoperating shock, Vibration, 9.6.1, Operating vibration, 9.6.2, Nonoperating vibration,

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