Max Pool Size (for RAIDZ2)?

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Max Pool Size (for RAIDZ2)?

Post by mkush » Thu Sep 27, 2012 12:16 pm

I understand there is a max pool size of 16TB. What I need to know is how this is calculated... raw storage space or resulting pool size based on RAID level chosen.

Specifically, my proposed system would have six 4TB drives in a RAIDZ2. So, raw space is 24TB, over the limit, but actual usable pool size is 16TB, which is fine.

Unfortunately I don't have a good way of testing this prior to investing in an expensive Mac Pro, so if someone could give a definitive answer it would be great!
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Re: Max Pool Size (for RAIDZ2)?

Post by si-ghan-bi » Thu Sep 27, 2012 1:51 pm

Are you really going to buy a Mac Pro NOW? such outdated and overpriced configuration??
Unfortunately it may be your only choice, but still...
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Re: Max Pool Size (for RAIDZ2)?

Post by mkush » Thu Sep 27, 2012 3:00 pm

I can't quite make myself do it. Just doesn't "feel" right. I'm leaning towards a system of two-drive Thunderbolt enclosures, each containing a ZFS mirrored pair. I don't need most of the data online all the time, so if I can put up with the swapping when necessary, this will be my most cost-effective option.

But seriously, how hard would it have been for Apple to come out with a 2012 Mac Pro with (1) up-to-date processors and (2) Thunderbolt? Then if they want to do a big redesign, save that for 2013 or 2014. But it's kind of like they didn't have their redesign ready so they just did nothing. Seems like a big mistake to me. Then again, it's a very small part of their product line, for better or worse.
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Re: Max Pool Size (for RAIDZ2)?

Post by si-ghan-bi » Thu Sep 27, 2012 3:29 pm

If you need a Mac Pro better look for a used one :)
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Re: Max Pool Size (for RAIDZ2)?

Post by mkush » Thu Sep 27, 2012 5:29 pm

Yeah, probably. Although their values stay pretty high... I've just about talked myself out of the MP. Don't tempt me again!
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Re: Max Pool Size (for RAIDZ2)?

Post by mkush » Thu Sep 27, 2012 5:30 pm

Doesn't anyone know the answer to my original question? I may not need the answer anymore but I'm still curious...
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