Texas Memory Systems RamSan-300/320 - Manual (Page 80)

Chapter 8 – System Maintenance
One of the main features of the RamSan is the ability to hot swap many of the
system components. You can hot swap the power supplies and disk drives, meaning
that you can remove and replace these components while the system is running.
8.1 Hot Swapping Power Supplies
The RamSan-3xx series includes two power supplies. The system only
requires one functioning power supply to run. Texas Memory Systems has
taken special care to enclose the RamSan power supplies in a protective
case to minimize the electrical risks for users; however, it is critical for
users to follow the following steps when removing and replacing the power
supplies:
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Disconnect the power cord from the power supply.
Wait 15 seconds.
Remove the power supply that needs to be replaced from the RamSan
chassis by pressing the release switch and pulling squarely on the
power supply handle. DO NOT REACH INSIDE THE PROTECTIVE
ENCLOSURE AFTER REMOVING THE POWER SUPPLY.
Insert the replacement power supply in the RamSan chassis. Make
sure to insert the power supply squarely and press firmly until the
power supply is fully inserted into the system.
Reconnect power to the new power supply.
The new power supply begins to operate immediately.
Important:
Replace failed power supplies as soon as possible.
8.2 Hot Swapping Disk Drives
The RamSan-320 includes three internal hard disk drives in a RAID
configuration. The system can operate with all disks operational, one disk
operational, or no disks operational. Two drives are for striped data and
the third is for parity information.
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.
RamSan-300/320 User’s Manual - 76 -