Hi,

 

I've been using my first Unraid server for a few months now and I'm pretty excited about it.

I build a server with the following configuration

- supermicro, 128GB ECC RAM

- 2x 2TB NVME ZFS Cache Pool (RAID Z1)

- Array with:

   2x18TB (1x18TB Parity) - XFS

   4x6TB - XFS

 

I wonder where the data that is very important to me (especially family photos) should be stored: on the ZFS Cache Pool ECC protected or on the array. 

In other words: are the data equally protected against failure? I am a little skeptical because the last parity check had some errors (the second check none). The disadvantage at the moment is that I don't have much space left on the NVME Cache pool ..

 

thanks in advance for your suggestions,

 

regards,

38 minutes ago, Neo78 said:

are the data equally protected against failure?

 

Equal in that they're not protecting your data at all, yes. Z1 and single parity are essentially the same. 

 

Back up your important data.

1 hour ago, Michael_P said:

Equal in that they're not protecting your data at all, yes. Z1 and single parity are essentially the same.

ok, thanks for the Info. I thought there is maybe a difference between this two methods, and Z1 is "more" secure against HDD failure.

 

Of course, a backup of the important data is essential (I'll use my old NAS and/or external HDD for this)

24 minutes ago, Neo78 said:

and Z1 is "more" secure against HDD failure.

 

3 hours ago, Neo78 said:

2x 2TB NVME ZFS Cache Pool (RAID Z1)

Two devices can only be a mirror, not RAIDZ, but still has the same 1 device redundancy, zfs does add checksums to the data, so you can always run a scrub to confirm if all is well.