So right now I have a HTPC with (3) 1TB harddrives Software-Raid5'ed giving me something like 1.9TB of storage available for recording TV shows / media / backing up my DVD's.
As I'm about 50GB off from this cap, so I've been doing research.
My HTPC case supports 4 drives, and i'm looking for a somewhat long-term solution for upgrading over time.
What I figure I'll do is this:
Since 2TB Hd's are like 15$ more, I'll buy a 2TB Harddrive, and add it to my RAID5 array. This (theoretically) should give me an additional 1TB of storage (Since it should use the lowest drive size as the amount of data to replicate.)
When I need more space, buy (3) 2TB harddrives, and replace them one by one, until I have 4 Physical 2TB harddrives, with that are 50% used. My question is this.
Once I hit that point, can i expand the amount of storage each drive is using for raid5?
I'll have 8 Terabytes physically available, but only ~3 terabytes partitioned. Can I then expand the space used on each drive to give me the full n-1 (~6TB)?
I'm using Ubuntu 11 Desktop, running XBMC.