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PS4100 Hardware Maintenance Guide Maintaining Drives

Figure 6 LEDs on 3.5-inch Drives

Figure 7 LEDs on 2.5-inch Drives

Table 4 Drive LED States

Array Behavior When a Drive Fails

How an array handles a drive failure depends on whether a spare drive is available and whether the RAID

set containing the failed drive is degraded.

For example:

• If a spare drive is available, the array automatically uses it to replace the failed drive. Performance is

normal after reconstruction completes.

• If a spare drive is not available the RAID set will become degraded (except a RAID 6 set). Performance

may be impaired. A RAID 6 set can survive two simultaneous drive failures.

Description Indicator States

Drive activity indicator (ACT LED) Blinking green: Drive is busy

Steady green: No drive activity

Drive status indicator (PWR LED) Green: Drive OK

Amber: Drive failed

Off: No power to drive

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Dell PS4100 Guide d'installation Page 14