@comdirect Use this command: (replace sda in the command below with the relevant device) cat /sys/block/sda/queue/scheduler The active scheduler will be enclosed in brackets. e.g. noop deadline [cfq] For multiple drives use: grep "" /sys/block/*/queue/scheduler

The SR won't store the metadata. Maybe you have a metadata backup saved for this pool?

They are able, but not at a great speed. It doesn't matter how many cores, it's likely heavily single threaded and relying on how fast you can do many efficient instructions per cycle. That's why you should switch to CR.