Acer SmartRAID V Bedienungsanleitung PDF herunterladen (Seite 154)

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Storage Manager

Verify

NOTE Data inconsistencies should not occur under normal

conditions. However, a power failure that interrupts an array

write operation can cause inconsistencies. Using the Verify

function to make the data consistent does not ensure that

the new consistent data is the correct data.

Running a Verify operation for RAID 1 and RAID 5 arrays ensures that the

redundant information contained in the array is consistent. This operation

is performed by the SmartRAID V controller concurrent with normal

system operation and requires no user or host computer intervention.

To start data verification on an array, select Verify in the Array Group

Information window.

If any inconsistencies in the data redundancy are found, they are made

consistent.

For RAID 1 arrays, the mirrored drive pairs are compared sector by

sector to ensure that both drives contain identical data.

For RAID 5 arrays, parity is recalculated and checked against the stored

parity information.

For RAID 0, only a disk media ECC check is performed.

Running Verify on an array that is in a degraded state can result in

significantly reduced I/O performance. Although there is no impact on the

host CPU, system I/O performance can be affected due to increased

demand on controller resources. If this is a concern, use the Background

Task Priority feature to assign a lower level priority to background

processes.

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Acer SmartRAID V Bedienungsanleitung Seite 154