Seagate ST9300403SS ユーザーズマニュアル

Savvio 10K.3 SAS Product Manual, Rev. G

23

[1]

Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-
ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]

For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 
9,936 RPM. The ±5% must be maintained after the drive signifies that its power-up sequence has been 
completed and that the drive is able to accept selection by the host initiator. 

[3]

See +12V current profile in Figure 17.

[4]

This condition occurs after OOB and Speed Negotiation completes but before the drive has received the 
Notify Spinup primitive.

[5]

See paragraph 7.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and 
transient response.

[6]

Operating condition is defined as random 8 block reads.

[7]

During idle, the drive heads are relocated every 60 seconds to a random location within the band from 
three-quarters to maximum track.

 

 

+12V [2]

Avg idle current DC

[1] [7]

0.35

0.14

0.36

0.14

Maximum starting current

(peak DC) DC

3

σ

0.52

1.18

0.53

1.19

(peak AC) AC

3

σ

0.77

2.30

0.82

1.93

Delayed motor start (max) DC

3

σ

[1] [4]

0.56

0.04

0.57

0.06

Peak operating current (random read):

     

Typical DC

[1] [6]

0.45

0.36

0.48

0.33

Maximum DC

3

σ

0.48

0.36

0.52

0.33

Maximum (peak) DC

3

σ

1.08

1.18

1.14

1.16

Peak operating current (random write)

Typical DC

0.50

0.26

0.53

0.24

Maximum DC

3

σ

0.52

0.27

0.56

0.25

Maximum (peak) DC

3

σ

0.98

1.18

1.06

1.18

Peak operating current (sequential read)

Typical DC

0.85

0.16

0.87

0.13

Maximum DC

3

σ

0.88

0.16

0.92

0.14

Maximum (peak) DC

3

σ

1.12

0.28

1.16

0.26

Peak operating current (sequential write)

Typical DC

0.80

0.16

0.83

0.13

Maximum DC

3

σ

0.83

0.16

0.87

0.14

Maximum (peak) DC

3

σ

1.00

0.30

1.06

0.28