14 Barracuda 4LP Installation Guide, Rev. B
[2] Standard factory units are formatted 512 data byte s pe r sector wit h
sparing equivalent to eighty spare sectors per eight cylinder r egion.
Spares are located at the end of each sparing region.
[3] Includes controller overhead.
Table 2a. DC power requirements (Amps)
Notes for this table follows Table 2b.
ST34371/ST34571
N/W/WC
Single-ended WD/DC
Differential
Voltage +5V +12V +5V +12V
Regulation [5] ±5% ±5%[2] ±5% ±5%[2]
Max. operating current
DC3σ [1] 0.81 0.95 1.21 0.95
Avg. idle current DCX [1] 0.46 0.54 0.70 0.54
Max. starting current
(peak DC) DC3σ [3]
(peak AC) AC3σ [3] 0.78 2.44
3.1 1.1 2.44
3.1
Delayed motor start (max)
DC3σ [1][4] 0.48 0.20 0.90 0.20
Peak operating current
Typical DCX [1][6]
Maximum DC3σ [1]
Maximum (peak) 3σ
0.75
0.81
1.5
0.76
0.95
2.5
1.05
1.21
2.0
0.76
0.95
2.5