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CA turbo write mode?
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Is this for parity drives? Does this speed up parity checks?
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Parity Check already has all your drives spun up, this setting isn’t going to change anything with that.
When it is OFF anytime you write to the array, it reads the disk, reads the parity, then goes back to write to the disk and parity. This takes more time because the head is now past those bits on the drive.
With reconstruct write ON, it doesn’t read the existing data for parity or the drive you’re writing to, it calculates the parity block all new by reading from all the other drives. This is significantly faster for lots of writes, but is more drive wear.
If I’m doing a big pull to fill my server, where it caps out my array, should I use it?
Yes, it’s for parity. It will spin up all your drives for parity read operations while a large write is taking place. It definitely increases the speed of the write operation, at the cost of needing all of your other drives spun up.
So it’s bad for durability? I’m just 15hrs into my parity check with another 15 to go