RAID5 - starting with one drive

If you are running Linux with mdadm, then you CAN create a 1 disk RAID5 array, and expand it with n disks later on. Just make sure you add them one at a time, and make sure you have no vital data, because if a disk goes bad during expansion, you are at risk of losing things.
 
xrapidx said:
sorry for necro.

But the time has come, my microservers are dropping dead like flies.

Could someone explain what happens in an unraid setup if I have three drives and one dies - do I loose ANY data?
Click to expand...

No, you will not lose anything. Just be careful to replace that disk or have a spare on hand just in case.
 
xrapidx said:
So then it works like raid?
Click to expand...

Ayup, it's actually quite cool. A couple ways to do it. You can either create virtual disks on a single drive, and RAID those, then swap them out for real drives as you grow. Or, you can just create an array of a single disk, then grow it as you add more. The first is a bit easier to set up, but you have less space to begin with.
 
I basically want one large logical disk I can grow with redundancy. Probably start off with three 2tb disks.
 
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