Hello,

I'm planning on replacing an old fileserver that has a single 1T drive 
with something a little newer having 3T of space.  I have two 3T drives 
and have installed OpenBSD 6.0 to both as a softraid mirror.  Works well 
and I simulated a drive failure by shutting it down, removing a drive, 
and rebooting.  The drive has been re-installed and it is now rebuilding 
the mirror.  After 17 hours it is 24% complete, so it'll be about three 
days to complete.  The system is:

AMD E2-3200 2.40 GHz
4G RAM
2 x 3T Seagate Barracuda 7200rpm SATA 

With this much disk space, should I be looking at another way of 
achieving data redundancy?  The goal is to increase redundancy of the 
data and the mirror would be periodically backed up to another server in 
a different building.  My only concern here is the suitability of the 
softraid mirror for a large filesystem.  I've thought of using the 
second drive as a backup and rsync'ing it nightly, but then failure of 
the primary drive would mean more downtime before it's operational 
again.  A long rebuild time isn't a major problem; just want to make 
sure I'm not overlooking a more sensible option.

FWIW, I used the following info to get set up:

https://www.openbsd.org/faq/faq14.html#softraidDI
http://openbsd-archive.7691.n7.nabble.com/Large-3TB-HDD-support-td95308.html

Thanks,

-- Ian


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