Seagate ST9900805SS Savvio 10K.1 SCSI Product Manual - Page 31

Physical/electrical specifications

Get Seagate ST9900805SS PDF manuals and user guides View all Seagate ST9900805SS manuals
Add to My Manuals
Save this manual to your list of manuals

Page 31 highlights

6.0 Physical/electrical specifications This section provides information relating to the physical and electrical characteristics of the Savvio SCSI drive. 6.1 None. AC power requirements 6.2 DC power requirements The voltage and current requirements for a single drive are shown in the following table. Values indicated apply at the drive power connector. The table shows current values in Amperes. Table 2: DC power requirements Voltage Regulation Average idle current DC Maximum starting current (peak DC) DC (peak AC) AC Delayed motor start (max) DC Peak operating current DC Maximum DC Maximum (peak) DC Notes ST973401 SE mode LVD mode ST936701 SE mode LVD mode +5 V +12 V +5 V +12 V +5 V +12 V +5 V +12 V [5] +10%/ +10%/ +10%/ +10%/ +10%/ +10%/ +10%/ +10%/ -7.5% -7.5%[2] -7.5% -7.5%[2] -7.5% -7.5%[2] -7.5% -7.5%[2] X [1][7] 0.51 0.21 [3] 3σ [3] 3σ 0.68 1.68 1.01 2.70 3σ [1][4] 0.49 0.05 [1] [6] X [1] 0.73 0.40 3σ 0.75 0.46 3σ 1.12 1.50 0.50 0.21 0.72 1.68 1.14 2.65 0.48 0.05 0.74 0.43 0.75 0.49 1.32 1.54 0.51 0.19 0.70 1.58 1.00 2.68 0.49 0.05 0.74 0.46 0.76 0.49 1.14 1.48 0.50 0.19 0.65 1.58 1.03 2.66 0.49 0.05 0.69 0.47 0.74 0.49 1.30 1.48 [1] Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous current peaks will exceed these values. Power supply at nominal voltage. Number of drives tested = 6, 35 Degrees C ambient. [2] For +12 V, a -10% tolerance is permissible during initial start of spindle, and must return to ±5% before 10,000 rpm is reached. 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 +12 V current profile in Figure 2. [4] This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start Motor command. [5] See Section 6.2.1 "Conducted Noise Immunity." Specified voltage tolerance is inclusive of ripple, noise, and transient response. Savvio SCSI Product Manual, Rev. D 25

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
Savvio SCSI Product Manual, Rev. D
25
6.0
Physical/electrical specifications
This section provides information relating to the physical and electrical characteristics of the Savvio SCSI
drive.
6.1
AC power requirements
None.
6.2
DC power requirements
The voltage and current requirements for a single drive are shown in the following table. Values indicated apply
at the drive power connector. The table shows current values in Amperes.
[1]
Measured with average reading DC ammeter or equivalent sampling scope. Instantaneous current peaks
will exceed these values. Power supply at nominal voltage. Number of drives tested = 6, 35
Degrees C
ambient.
[2]
For +12 V, a –10% tolerance is permissible during initial start of spindle, and must return to ±5% before
10,000 rpm is reached. 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 +12 V current profile in Figure 2.
[4]
This condition occurs when the Motor Start Option is enabled and the drive has not yet received a Start
Motor command.
[5]
See Section 6.2.1 “Conducted Noise Immunity.” Specified voltage tolerance is inclusive of ripple, noise,
and transient response.
Table 2:
DC power requirements
Notes
ST973401
ST936701
SE mode
LVD mode
SE mode
LVD mode
Voltage
+5 V
+12 V
+5 V
+12 V
+5 V
+12 V
+5 V
+12 V
Regulation
[5]
+10%/
-7.5%
+10%/
-7.5% [2]
+10%/
-7.5%
+10%/
-7.5% [2]
+10%/
-7.5%
+10%/
-7.5% [2]
+10%/
-7.5%
+10%/
-7.5% [2]
Average idle current DC
X
[1][7]
0.51
0.21
0.50
0.21
0.51
0.19
0.50
0.19
Maximum starting current
(peak DC) DC
3
σ
(peak AC) AC
3
σ
[3]
[3]
0.68
1.01
1.68
2.70
0.72
1.14
1.68
2.65
0.70
1.00
1.58
2.68
0.65
1.03
1.58
2.66
Delayed motor start (max) DC
3
σ
[1] [4]
0.49
0.05
0.48
0.05
0.49
0.05
0.49
0.05
Peak operating current
DC
X
Maximum DC
3
σ
Maximum (peak) DC
3
σ
[1] [6]
[1]
0.73
0.75
1.12
0.40
0.46
1.50
0.74
0.75
1.32
0.43
0.49
1.54
0.74
0.76
1.14
0.46
0.49
1.48
0.69
0.74
1.30
0.47
0.49
1.48