Table of Contents
Advertisement
1.6
Shock and Vibration
Table 1.6 lists the shock and vibration specification.
Vibration (swept sine, one octave per minute)
• Operating
• Non-operating
Shock (half-sine pulse, Operating)
• 2 ms duration
• 11 ms duration
Shock (half-sine pulse, Non-operating)
• 2 ms duration
• 11 ms duration
1.7
Reliability
(1)
Mean time between failures (MTBF)
The mean time between failures (MTBF) is 500,000 POH (power on hours) or more
(operation: 24 hours/day, 7 days/week).
This does not include failures occurring during the first three months after installation.
MTBF is defined as follows:
Total operation time in all fields
MTBF=
number of device failure in all fields
"Disk drive defects" refers to defects that involve repair, readjustment, or replacement. Disk
drive defects do not include failures caused by external factors, such as damage caused by
handling, inappropriate operating environments, defects in the power supply host system, or
interface cable.
(2)
Mean time to repair (MTTR)
The mean time to repair (MTTR) is 30 minutes or less, if repaired by a specialist maintenance
staff member.
(3)
CSS cycle
The number of CSS must be less than 40,000.
Table 1.6
Shock and vibration specification
C141-E090-01EN
5 to 300 Hz, 0.5G-0-peak
(without non-recovered errors)
5 to 400 Hz, 4G-0-peak (no damage)
30G (without non-recovered error)
10G (without non-recovered error)
250G (Typical, no damage)
75G (No damage)
(H)
1 - 9
Advertisement
Table of Contents
