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4-4
Troubleshooting
Replacing Components
It is important to follow these instructions when replacing components in the
ProLiant Storage System /U. If done improperly, it is possible to lose data or
damage equipment.
Disk Drives
If you must replace a hot-pluggable drive, it is important that you follow these
guidelines.
If the drive is NOT part of a fault tolerant system, you may replace the
drive with the storage system powered ON or OFF.
If the drive is part of a fault tolerant data protection system, you must
replace the drive only when the storage system power is ON and the On-
line and Drive Access indicators are OFF.
Figure 4-4 (following) illustrates the conditions when you may or may not
remove a drive in a fault-tolerant system.
CAUTION: Failure to observe these conditions when replacing a failed
drive in a fault-tolerant configuration may result in data loss.
Compaq ProLiant Storage System /U User Guide
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