Data Networks: Routing, Security, and Performance Optimization
Provides coverage of routing, security, multicasting, and advanced design topics, as well as strategies for overcoming challenges in network design and management.
TABLE OF CONTENTS Data Networks: Routing, Security, and Performance Optimization
Appendix G: Example MTTR Procedures
G.1 Mean Time to Repair (MTTR) Rack-Mounted PC chassis
The following examples are typical illustrations of the time to replace mechanical components in a 19-inch rack-mounted PC chassis. All times assume that fault isolation has taken place. Total times listed include boot time, estimated at 1 minute and 30 seconds (i.e., the time required for the unit and software to become fully operational after the repair is complete). All testing was done with a unit rack-mounted at approximately 5 ft.
G.1.1 Replace PCI Network Interface Card (NIC)
Procedure
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Open chassis (2 screws and slide chassis out)
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Remove brace (2 screws)
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Remove NIC (1 screw)
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Reboot system
Total Time = 4 min 30 sec (3 min repair + 1 min 30 sec reboot)
G.1.2 Replace power supply
Procedure
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Power supply removes from rear of unit (2 screws)
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Reboot system
Total Time = 2 min 30 sec (1 min repair + 1 min 30 sec reboot)
G.1.3 Replace CDROM or floppy drive
Note that the procedure and times were essentially the same for both the CDROM and the floppy drive.
Procedure
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Open chassis (2 screws and slide chassis out)
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Remove CDROM/floppy assembly (2 screws)
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Remove CDROM or floppy (4 screws)
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Reboot system
Total Time = 7 min (5 min 30 sec repair + 1 min 30 sec reboot)
G.1.4 Replace FAN assembly
Procedure
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Open chassis (2 screws and slide chassis out)
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Remove FAN assembly (1 screw and slide up)
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Remove power cable to motherboard
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Reboot system
Total Time = 4 min 30 sec...
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