In order to get maximum performance with the newly setup RAID, I added some udev rules (by placing them in /etc/udev/rules.d/83-md-tune.rules) to increase caching. The file has one entry for each of the involved disks (sdX) to adjust the read-ahead: ACTION==”add”, KERNEL==”sdX”, ATTR{bdi/read_ahead_kb}=”6144″ And one for the mdX device to adjust the read-ahead as well […]

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