October 3, 20232 yr It's over 12 hours since I started, and still going now with 15% left to finish, expected time remaining bouncing around between 2-4 hours. The read/write speeds displayed all over the map. It's not always running this slowly, but it seldom gets faster than 100 MB/s, while the SSDs are supposedly capable of over 500 MB/s. I'd hazard a guess that 50 MB/s has been the more or less typical speed. Nothing else is going on reading or writing to the array. It has nothing to do other than build parity. Is this possibly a bus speed limitation? Too much SATA traffic going on at the same time? Edited October 3, 20232 yr by RasterEyes
October 3, 20232 yr Community Expert 1 minute ago, RasterEyes said: while the SSDs are supposedly capable of over 500 MB/s Most SSDs cannot sustain those speeds, they can for a few GBs while filling up a pseudo SLC cache, I don't know that brand/model but based on the price I bet they are in the group that cannot sustain a high write speed.
October 3, 20232 yr Author 54 minutes ago, JorgeB said: Most SSDs cannot sustain those speeds, they can for a few GBs while filling up a pseudo SLC cache, I don't know that brand/model but based on the price I bet they are in the group that cannot sustain a high write speed. I hadn't considered that. How fast can more expensive SSDs go at a sustained rate?
October 4, 20232 yr Community Expert Current good TLC drives usually max out at around 300/400MB/s, older MLC drives were faster.
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