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Which UPS / Which Raid, 6 or 10.

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September 25, 2012 3:14:21 AM

I am adding an internal raid to a mac pro. ATTO Card. 4 3TB drives. I had planned to build a Raid 6 array with the 4 drives that would give me 6TB of storage. I have read in some places that if I go with a raid 10, I get the same storage but faster writes. I can't find a reasonable qualification of what faster means, other than Raid 6 requires 6 IO operations for each write, where as a raid 10 would require only 2.

Does anybody have any experience of the relative speed differences?

The machine is used for photo editing, retouching and storage of > 200K images. Using Capture One Pro, Adobe CS 6, etc. Backups are to a Synology NAS and clones are done depending on workload for offsite storage.

I am also looking for advice on a reasonable UPS to get for the Mac Pro and further down the road an external 8 or 16 bay drive unit.

Phew.
Thanks.

More about : ups raid

September 25, 2012 4:37:54 PM

Thanks for the link.

I had read that posting but it was not really clear on the specifics. With that in mind maybe I will build both a raid 10 and a raid 6 and test. If I do that do you have suggestions on a tool to use to get good sense of the speed difference? I have been using Blackmagic from the App store so far.

Thanks for the UPS recommendation. I will take a look.
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September 25, 2012 11:59:52 PM

Basically, RAID 1+0 gives you better write performance, faster rebuild speed, and the performance degradation during rebuild process is minimal. However, RAID 6 can withstand the loss of two disks, which RAID 1+0 can also do, but only if your cards are right.

Try HD Tune Pro.
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