Re: LVM RAID5 with missing disk?
Some mistakes in what you wrote.
Gary Dale a écrit :
> RAID 1 and RAID 5 are both immune to single disk
> failures in their most common configurations (1 or more data disks with
> 1 parity disk). RAID 10 is also immune to single disk failure but uses
> half the disks for parity.
RAID 1 and 10 are just mirrors, they have no parity. I guess you mean
RAID 5 does not use data disks and parity disks. Data and parity are
distributed among all disks in the array.
RAID 1 with N disks can survive N-1 disk failures.
> If you are concerned about availability, with 4 disks (the simplest RAID
> 10 configuration)
Linux can use a special RAID 10 mode (mirror+stripe) with two or three
> with 6 disks, RAID 6 will give you double the capacity of 4 disks
> or get you immunity to 3 disks failing.
RAID 6 can survive 2 disk failures regarless of the number of disks in