RAID Setup Question

stedwickstedwick
Posted:
in Genius Bar edited January 2014
I have an internal 250 gb hard drive and an external 250 gb firewire hard drive.



I want to buy a 500 gb external firewire hard drive and then do the following:



1) Concatenate my two 250 gb hard drives.



2) Mirror that new concatenated drive onto the 500 gb one.



Is that possible / recommended?



I think it can be done with disk utility, but I don't know if it can be done with only three drives. As in, can I "RAIDify" a drive that already has data on it? Because if I can't, it seems that I would need a 4th drive to temporarily store my data while I create the RAIDs.



Any help / thoughts are appreciated!



Philip

Comments

  • Reply 1 of 1
    ebbyebby Posts: 3,110member
    First off you are messing with partitions so yea, you would need to store your data somewhere else for a bit. I am not sure if Disk utility will allow you to use a drive in multiple software RAID setups, but it seems possible to first create a RAID0 from two drives and then a RAID1 with the 500GB.



    I have a similar setup with two RAID5 arrays joined in a RAID0 in Dusk Utility. The difference with mine is that the two RAID5 arrays are hardware-based and look like a single drive that can be merged together in Disk Utility.
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