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Mac OS X Leopard - ARCAism

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RAID<br />

CHAPTER 6 COMMON LEOPARD MAINTENANCE 127<br />

The RAID tab (Figure 6-4) allows you to configure multiple hard drives into a single volume (or<br />

RAID set name).<br />

Figure 6-4. The RAID tab allows you to combine multiple hard drives into a single volume.<br />

Disk Utility allows you to create three different types of RAID configurations:<br />

Mirrored RAID Set (a.k.a. RAID 1): This will configure two hard drives of the exact same<br />

size in a mirrored array. This means that any data you store on the resulting volume will<br />

be physically stored separately on each drive, thus assuring that the data will be safe in the<br />

event that one of the drives fails.<br />

Stripped RAID Set (a.k.a. RAID 0): This option will take two hard drives of the exact<br />

same size and combine them into one larger volume (equal to the size of both of them<br />

together). It will do this in such a way that alternating data is fed to each physical drive,<br />

thus greatly increasing overall disk read and write speeds. This is very popular with people<br />

who work with large amounts of data and large media files. On the downside, if either<br />

drive fails it will be difficult to recover any data from either drive.<br />

Concatenated Disk Set: This will take any number of hard drives and combine them into a<br />

single volume spanning all the drives.

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