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8.3 Hot Swapping Disk Drives
The RamSan-320 includes three internal hard disk drives in a RAID
configuration. Two drives are for striped data and the third is for parity
information. The backup RAID is not operational with less than two disks.
If a single hard disk drive fails, the system continues to write to the
available hard disk drives. When this occurs, replace the malfunctioning
disk with a new hard disk drive. Once inserted, the system synchronizes
the new disk. While the restore degrades overall system write
performance, read operations continue uninterrupted.
Important:
Do not remove disk drives during synchronization. Removing disk drives
may destroy data on all disks, which requires removing and replacing all
drives for a complete synchronization with memory.
If all hard disks fail, the system automatically detects this and stays
operational; however, the system remains volatile until three new hard
drives are replaced. When the new drives are replaced, the system
rebuilds the drives from the system memory image.
Use the following steps to replace bad disk drives:
1. Verify that disk synchronization is not in progress. If one is in
progress, then wait for the synchronization to complete before
continuing.
2. Slide the hard disk eject latch to the right.
3. Remove the hard disk by pulling squarely on the handle.
4. Insert new hard disk squarely into the available slot. Ensure the disk
drive is completely inserted into the system and flush with the chassis.
Warning:
The system erases any pre-existing data on hard disk drives inserted into
the RamSan-320 while the system is running.
Important:
TMS does not advise removing functional hard disks. While the action
should be perfectly safe, it may affect system performance or downtime,
depending on the system mode, as the system synchronizes the new disk
drive.
RamSan-300/320 User’s Manual - 85 -