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

[markw at mohawksoft.com]

Why two mirrors and not a RAID5 - or is RAID6 more appropriate 4T?



> On Wed, 27 Jul 2022 11:51:58 -0400
> markw at mohawksoft.com wrote:
>
>> I just replaced a bad drive with sdk. I've had this configuration
>> since 2T hard disks became afordable. It's not getting on in years,
>> and I'm only getting 4T, but it is redundant. The logs and cache
>> drives are ssd.
>
> root at marller:~# zpool status
>   pool: zfs
>  state: ONLINE
>   scan: scrub repaired 0B in 07:56:10 with 0 errors on Sun Jul 10 08:20:11
> 2022
> config:
>
>   NAME                                             STATE     READ WRITE
> CKSUM
>   zfs                                              ONLINE       0     0
>  0
>     mirror-0                                       ONLINE       0     0
>  0
>       ata-WDC_WD40EFRX-68N32N0_WD-WCC7K2DCAHVT     ONLINE       0     0
>  0
>       ata-WDC_WD40EFRX-68N32N0_WD-WCC7K2ZE8257     ONLINE       0     0
>  0
>     mirror-1                                       ONLINE       0     0
>  0
>       ata-WDC_WD40EFRX-68N32N0_WD-WCC7K2SZ8AVP     ONLINE       0     0
>  0
>       ata-WDC_WD40EFRX-68N32N0_WD-WCC7K4ADA716     ONLINE       0     0
>  0
>   cache
>     ata-Crucial_CT250MX200SSD4_15100EE96B90-part3  ONLINE       0     0
>  0
>
> I have four 4T drives, 16T raw, in pairs so 8T usable. The OS drive on
> the current incarnation is a 250GB NVMe (hand me down from another
> machine). Since I only need a small portion of the space for the OS I
> carved out a 100GB partition to use as cache (L2ARC).
>
> --
> \m/ (--) \m/
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