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Happy ZFS raidz2

wingfat

wingfat

Weaksauce
Joined
May 13, 2010
Messages
115
Building a new server and I wish to install a 10 x 4TB raidz2. I already have 5 WD RED 4TB drives form another server and need 5 more drives.

I have been leaning toward the HSGT 4TB NAS drives to complete the system but have doubts if I should just go all WD Red. I know I can safely do (2) 5 x 4TB raidz and stripe them with the two different brands.

I guess either way I'll be sacrificing the extra performance of the HSGT drives but I'm looking for that extra reliability.

Can I reliably mix and match RED and HSGT in a RAIDZ2? What about drive failure... will I be able to substitute one for the other?

Thanks...
 
Probably work, not sure I'd want to mix different speed drives in an array, but I don't think it will hurt you. I would not go less than raidz2 for any part of the pool with that size drive.
 
You should not have a problem mixing them other than performance as if they were all reds.
 
I have 10 drives and it's an utter hodge podge.

You also have a choice. You can RAIDZ2 all 10 together. Or you can RAIDZ1 2 sets of 5. This is how I ended up. But it was mostly from expanding an initial set of RAIDZ1x5. If you have a failure you only subject half the drives to a rebuild. But you run the risk of a second drive failing on that same set.
 
Mixing drives should be a non-issue. For example, my backup rig has 8*3TB HD's in a RAIDz2. Seven of those drives are Seagate 7200 RPM drives, whereas that 8th drive is a 5900 RPM drive. It's worked flawlessly.

I must admit, I'm a bigger fan of RAIDz2 (raid6) over two*RAIDz1 (raid50). If the wrong two drives go down in a RAIDz1 set, you're SOL.

May the odds be ever in your favor and your backups recent!
 
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