Best Stripe Size for 168TB RAID 6

bigraid · Jul 27, 2016

Creating a 168TB RAID 6 (24x8TB) w spare, for storage of large media, mostly Finished HD and 4K movie files.

Will also be accessing media to edit revisions and re-encoding as needed.

Connected to an Areca 1883x card - default stripe size is 64KBytes, was wondering if a larger stripe size of 256KB or 512KB would be better for the file sizes we are working with.

Any thoughts or suggestions?
Thanks

kanewolf · Jul 27, 2016

Personally I don't like odd (21+2) volume group sizes. I will also say that 150+ TB of space will be a very great loss when it gets corrupted or lost during a rebuild... Drive failure is not the only thing you need to think about. Here are a couple articles from SmallNetBuilder.com that illustrate the point RAID Is Not Backup and Prepare the right way

PERSONALLY, I would probably create multiple smaller volumes 2 x (8+2) + RAID 1 + 2 hot spares. If anything is irreplaceable, you can keep two copies on the two volume groups.

bigraid · Jul 28, 2016

kanewolf :

Thanks for the reply, I have thought about making two volumes in regards to corruption/rebuild time, as for data loss I do have duplicate RAID to this for backup, so was more interested in the correct Stripe Size as this one Editors will be accessing for production.

kanewolf · Jul 28, 2016

Since optimum stripe size is dependent on the software accessing the RAID it is difficult to predict. Larger is usually better. To be sure, you would have to benchmark.

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Best Stripe Size for 168TB RAID 6

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