[mythtv-users] Why RAID 5 stops working in 2009

[John Drescher]

> Given the amount of time it would take even a hardware controller to
> reconstruct a 2TB drive you'd be unwise to use them.
>
> 750GB drives using a decent hardware controller take about 30 hours to
> reconstruct a failed drive under raid 6.....this means you have a
> 'failure window' of those 30 hours when a 2nd failure kills you.  I
> can't imagine I'd even want this 'failure window' to be in the 72+
> hour timeframe.
>
For how many drives? I have done this with 6 x 750GB with software
raid and it was like 10 hours or so.

However a reshape from 5 to 6 disks did take forever.

John