Intel SC5250-E User Manual
Intel® Entry Server Chassis SC5250-E
Reliability, Serviceability, and Availability
Revision 1.02
Intel order number C32881-001
55
12. Reliability, Serviceability, and Availability
12.1 MTBF
Calculated Mean Time Between Failures (MTBF) at maximum configuration has been
calculated at 74000 hours for KDK at 35
calculated at 74000 hours for KDK at 35
°C.
Table 12. MTBF Calculations
Subassembly
(Server at 35 degrees C ambient air)
Standard
Configuration
MTBF (hours)
MTBF (hours)
Standard Configuration with Optional
Backplane
MTBF (hours)
450W Power Supply
100,000
100,000
Cooling fans (2- non redundant)
300,000
300,000
Hot Swap BP & SAF-TE card
1,500,000
1,500,000
Hot Swap SATA Back Plane
2,024,479
2,024,479
Front Panel Board 7,000,000
7,000,000
Intrussion Switch
25,000,000
25,000,000
Total Chassis Subassembly
74,000
70,000
12.2 Serviceability
The system is designed to be serviced only by qualified technical personnel.
The desired Mean Time To Repair (MTTR) of the system is 30 minutes including diagnosis of
the system problem. To meet this goal, the system enclosure and hardware have been
designed to minimize the MTTR.
the system problem. To meet this goal, the system enclosure and hardware have been
designed to minimize the MTTR.
The following are the maximum times that a trained field service technician should take to
perform the listed system maintenance procedures, after diagnosis of the system.
perform the listed system maintenance procedures, after diagnosis of the system.
Table 13. Maximum Maintenance Procedure Times
Remove cover
1 minute
Remove and replace hard disk drive
5 minute
Remove and replace 5 ¼ peripheral device
5 minutes
Remove and replace power supply
5 minutes
Remove and replace drive cage fan
7 minutes
Remove and replace expansion board
5 minutes
Remove and replace front panel board
5 minutes
Remove and replace server board (with no expansion boards)
15 minutes
Overall MTTR
20 minutes