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Parity drive track alignment for speed

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Is there a way to change how tracks across drives line up against your parity drive?

I have a combination of 16TB and 4TB drives in my array. The 16TB drives read/write at ~270MB/s in the outer tracks (beginning of drive) down to ~150MB/s on the inner tracks.

The 4TB drives max out at ~170MB/s on the outer tracks down to ~100MB/s on the inner tracks.

When I do a parity check, I basically get the performance of the 4TB drives for the first 4TB, then the performance of the 16TB drives for the rest.

It seems like it would be must faster overall if the 4TB drives were aligned either at the end, or in the 3rd quartile of the 16TB drive address space, so the performance matched more closely.

Rough calculations say I would gain ~100MB/s for 4TB of reads, which would save about 3 hours of read time. It would have a similar performance impact when doing a parity/drive rebuild, and also if I were running with turbo-write enabled.

Is there an option for this, and if not, then why not?

Edited by veri745
typos

  • Community Expert
12 hours ago, veri745 said:

Is there a way to change how tracks across drives line up against your parity drive?

Nope

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