Setting up 'raid' with only two hard drives? (G5 powermac)

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gmdenton@xtra.co.nz - 09 Jan 2006 10:43 GMT

I've just gone and got a second hard drive for my G5 powermac =) and i
heard that i could set the two drives up as "raid" which would impove
my computers performance by being able to use the two hard drives
simultanusly or something like that (i just want more juice, not too
much of a nerd, sorry)

So i've copied all my importaint infomation off the hard drive to an
external hard drive for safe keeping, and installed the second inturnal

hard drive (easy enough).

The problem is how do I go about erasing both the disks, making them
work as raid, then installing my stuff back on?

Any help would be much apperciated!!

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Malcolm - 09 Jan 2006 11:49 GMT

> I've just gone and got a second hard drive for my G5 powermac =) and i
> heard that i could set the two drives up as "raid" which would impove
[quoted text clipped - 11 lines]
>
> Any help would be much apperciated!!

Boot from your Tiger installation DVD and start Disk Utility. Select
the RAID option and create a Striped RAID set (HFS+ extended
journalling format) then install the operating system. Boot the new
system and copy back your user files. (I have not tried this myself.
I know Disk Utility on my HD has this option, but it is possible the
install disk version doesn't.)

The Striped RAID set should give improved read and write speed for
large files. Be aware that a failure of either drive means you lose
all your data, so backups are important.

A Mirrored RAID set gives more reliability because the data is
duplicated. The performance is improved when reading two or more files
at once because both drives can be used. Write speed is unchanged.
Of course with mirrored RAID your two disks don't hold any more data
than one disk.
You still need backups because you can still lose data via software or
user error.

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Mac Forum / General / Hardware / January 2006

Setting up 'raid' with only two hard drives? (G5 powermac)