[Discuss] ZFS for an Encrypted External Disk: My Experience and Notes

[markw at mohawksoft.com]

> On Wed, 27 Jul 2022 15:06:50 -0400
> markw at mohawksoft.com wrote:
>
>> Why two mirrors and not a RAID5 - or is RAID6 more appropriate 4T?
>
> Because parity RAID (RAIDZ-1/2/3) is slow.

A stripe over two mirrors is not as reliable as RAID6. If you have 4
drives arranged in two mirrors, each mirror can only survive the loss of
one drive. So, your system, if it loses 2 drives, has a 33.33% chance of
losing half its data.


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