Apple Xserve RAID User's guide Technical Information download pdf (Page 25)

Working With RAID Arrays 25

3 Select the arrays in the Disk list.

4 Choose Stripe or Mirror from the RAID Scheme menu.

5 Enter a name for the new software RAID set.

6 Choose a format for the array.

Note: You can take advantage of disk journaling by using the journaled volume format.

Journaling is a technique that helps protect the integrity of HFS+ disks in RAID arrays. It

both prevents a disk from getting into an inconsistent state and expedites disk repair if the

system fails.

When you enable journaling on an array, a continuous record of changes to ﬁles on the disks

in the array is maintained in the journal. If your system stops running because of a power

failure or some other problem, when you restart the system the journal is used to restore the

array to a known good state. Although you may experience loss of user data that was

buffered at the time of the failure, the ﬁle system is returned to a consistent state. In

addition, restarting the system is much faster.

If you are using Mac OS X Server, you can also turn journaling on or off for an array at any

time in the Information section of Disk Utility.

7 Click Create.

Once you’ve created your RAID arrays, you can use RAID Admin to monitor the Xserve RAID

system.

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Apple Xserve RAID User's guide Technical Information Page 25