RAIDz2 vs Raid 6

ycp

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Jun 22, 2014
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I am thinking about creating a home server with 100TB of total space.
I wanted to use Raid 6 but wanted to know if Raidz2 in ZFS would be faster than RAID 6 for read and write performance.
 

i386

Well-Known Member
Mar 18, 2016
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"It depends"
Without caching in any form zfs will be slower (using zil on the hdds) than normal raid 6.
With the use of ram as cache + an extra slog device raidz2 will outperform raid 6.

With ssd caching (cachecade or maxcache) raid 6 can get similar results in sequiental reads/writes, but the ram caching + slog will make zfs faster for small random io
 
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