Power Supplies Required For 240 Vac Pdus; Example: Calculating Required Number Of Drive Dc Power Supplies; Dc Power Supplies For Dem (120 Vac Pdu); Dc Power Supplies For Base (240 Vac Pdu) - Oracle StorageTek SL3000 System Assurance Manual

Table 5–2 (Cont.) DC Power Supplies for Base (120 VAC PDU)
Total Watts Used
by All Drives
564-843
Table 5–3
Total Watts Used
by All Drives
1 - 700
701 - 1,400
1,401-1,481

Power Supplies Required for 240 VAC PDUs

If the total watts used by the drives exceeds 843 W in the Base module or 1,481 W in
the DEM, 240 VAC PDUs are required. You cannot mix 120 VAC with 240 VAC PDUs
within the library. All PDUs must be the same type.
Table 5–4
Total Watts Used
by All Drives
1 - 1,063
1,064 - 2,263
2,264 - 3,463
3,464 - 3,805
Table 5–5
Total Watts Used
by All Drives
1 - 1,200
1,201 - 2,400
2,401 - 3,600
3,601 - 4,443

Example: Calculating Required Number of Drive DC Power Supplies

The sample library has a Base module and a DEM with all three drive types (T10000,
T9840, LTO).
tape drives in the Base module and DEM:
Table 5–6
Drive Type
T10000D
T9840D
LTO4
Power Supplies
Required for N+1
3

DC Power Supplies for DEM (120 VAC PDU)

Power Supplies
Required for N+1
2
3
4

DC Power Supplies for Base (240 VAC PDU)

Power Supplies
Required for N+1
2
3
4
5

DC Power Supplies for DEM (240 VAC PDU)

Power Supplies
Required for N+1
2
3
4
5
Table 5–6 and Table 5–7

Base Module Tape Drive Watts Consumption Example

Quantity of Drives
6
6
4
Calculating Tape Drive Power Supply Quantities
Power Supplies Power Supplies
Required for 2N Required for 2N+1
4 6
Power Supplies Power Supplies
Required for 2N Required for 2N+1
2 4
4 6
6 8
Power Supplies Power Supplies
Required for 2N Required for 2N+1
2 4
4 6
6 8
8 8
Power Supplies Power Supplies
Required for 2N Required for 2N+1
2 4
4 6
6 8
8 8
show how to calculate the total watts used by the
Multiply by Watts Total Watts Per
Per Drive Drive Type
127 762
100 600
46 184
Power and Cooling 5-5