Question : RAID1 in MAX OSx

i have a mac os x4.11 with 80G drive and the space is running out.
i want to increase the disk space by adding an nother disk 560G.
will the mac treat 560G as disk if i add this disk and configure the as RAID1 with exisiting 80G disk?
i do not want to rebuild the mac becuase user has lot of stuff .

Answer : RAID1 in MAX OSx

I would just suggest adding the 560G disk as just another drive, unless you really need RAID1...  If you do need RAID1, you will need 2 disks of the exact same size.  
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