Ricoh MP7400A Manual do Utilizador descarregar pdf (Página 8)

recover that RAID group.

What is the "Hot Expansion" function? On what occasions can it be used?

The hot-expansion function is used to enlarge the capacity of a RAID group without shutting down the system. With the hot-

swappable HDDs and RAID hot-expansion, it is now possible to expand your storage capacity on demand while getting the

maximum system uptime.

For example, assume that you only need 480GB of storage capacity. You can connect five 120GB HDDs to SURETE and create a

RAID-5 group. A year later, 480GB might not be enough and you will need 240GB more. At this time, you just plug in two 120GB

HDDs to SURETE and join them into that RAID-5 group. You will get a RAID group with the capacity of (480GB + 240GB) =

720GB. All these are done while the system is still on-line.

What will happen if there is a power loss while writing data to SURETE?

The data will probably be lost and the file system corrupted because some files may still be kept open and not correctly closed

before the system shuts down. If this happens, SURETE will perform a detailed file system checking process at the next reboot to

avoid corruption in the file system and to maintain the data integrity of the damaged files.

What will happen to the existing RAID groups at a restart that had a power loss in the rebuilding state?

When RAID group is still in the rebuilding state, once the power is loss or reboot. SURETE will continue previous rebuilding

percentage to rebuild RIAD group.

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Ricoh MP7400A Manual do Utilizador Página 8