no_connection
Patron
- Joined
- Dec 15, 2013
- Messages
- 480
Remember, a mirror does not guarantee against data loss if one disk breaks as there is no redundancy left and if the remaining disk have an error it will be uncorrectable.
Yes there is not a huge chance that it will end up in broken files but it is still there. And as you will be reading the entire amount of data when you resilver to a replacement disk, stressing it, who knows what will happen.
A four drive Z2 seems a little wasteful but you still have parity while you resilver the replacement. Thus it tolerates one disk failure without data loss.
You can loose two disks without loosing the pool, but you have no guarantee against uncorrectable errors.
Yes there is not a huge chance that it will end up in broken files but it is still there. And as you will be reading the entire amount of data when you resilver to a replacement disk, stressing it, who knows what will happen.
A four drive Z2 seems a little wasteful but you still have parity while you resilver the replacement. Thus it tolerates one disk failure without data loss.
You can loose two disks without loosing the pool, but you have no guarantee against uncorrectable errors.