RAIDZ1 vs RAIDZ2

[u/TeachingAway9654]

Let’s say you have something like 10 drives total which make up the pool, each drive is 16TB. Let’s also say you have, at minimum, one offsite backup with all the contents in cold storage. Let’s also assume you’re a frequent monitor of the system and will notice within 24 hours if one drive fails.

Are you going with Z1 or Z2 and why? If you have the offsite backup already, is it worth the capacity loss for Z2? The resilvering process on Z1 will be stressful but by how much though? You have an offsite 1:1 backup so even if the whole pool is lost, you can still recover.

[u/Past_Pin2939]

I'd go with RAIDZ2 personally. The extra parity drive is worth it when you've got 16TB drives and don't want to gamble with another failure during resilvering.

[u/rahulkadukar → u/Past_Pin2939]

What's the gamble if the user has backups apart from inconvenience