SCSI Backplane Board

Intel® Server Platform SR6850HW4 TPS

7.4.1.2Hot-Swap SCSI Hard Disk Drive Supplied Power

Hot-swap SCSI hard disk drives must fall within the power limits shown in Table 51. The SCSI Backplane Board works with drives that meet the following requirements.

Table 51. SCSI Backplane Board Board Power Limits per Drive

Device constraint

+5 V

+12 V

Peak start current

0.73A

1.5A

 

 

 

Max operating current

0.81A

1.15A

 

 

 

Average idle

0.68A

0.61A

 

 

 

7.4.1.3Power Supply Requirements

The external and internal power supply must meet the following requirements:

ƒRise time of less than 50ms (for all voltages).

ƒDelay of 5ms (minimum) from valid power to power good.

See Table 52 for voltage regulation requirements.

Table 52. DC Voltage Regulation

DC Voltage

Acceptable Tolerance

+5V

± 5%

 

 

+12V

± 5%

 

 

+3.3V

± 5%

 

 

+3.3Vstby

± 5%

+1.8V

± 5%

 

 

84

Revision 1.0

 

Intel order number D23151-001