On 21/12/2022 02:47, Dale wrote:
I think if I can hold out a little while, something really nice is going to come along. It seems there is a good bit of interest in having a Raspberry Pi NAS that gives really good performance. I'm talking a NAS that is about the same speed as a internal drive. Plus the ability to use RAID and such. I'd like to have a 6 bay with 6 drives setup in pairs for redundancy. I can't recall what number RAID that is. Basically, if one drive fails, another copy still exists. Of course, two independent NASs would be better in my opinion. Still, any of this is progress.
That's called either Raid-10 (linux), or Raid-1+0 (elsewhere). Note that 1+0 is often called 10, but linux-10 is slightly different.
I'd personally be inclined to go for raid-6. That's 4 data drives, 2 parity (so you could have an "any two" drive failure and still recover).
A two-copy 10 or 1+0 is vulnerable to a two-drive failure. A three-copy is vulnerable to a three-drive failure.
In other words, a two-copy raid-10 might be taken out by a failure that a raid-6 will survive. A three-copy raid-10 might be taken out by a failure that will take out a raid-6. Choose your poison :-)
Cheers, Wol
