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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With my Linux SW RAID screaming “grow me!” for quite a while now, I finally brought myself to replace the old 2TB disks with new 6TB ones (RAID 5 with 4 disks). While such a disk-upgrade has to be performed regularly, the frequency is so low that it is hard to remember the details when […]

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I finally upgraded my PowerStation from Fedora 18 to Fedora 21. The upgrade went pretty smooth and was not much more than: $ yum –releasever=19 –exclude=yaboot –exclude=kernel distro-sync $ yum –releasever=20 –exclude=yaboot –exclude=kernel distro-sync $ yum –releasever=21 –exclude=yaboot –exclude=kernel distro-sync As I was doing the upgrade without console access I did not want to change […]

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I had just finished tuning my ownCloud sync setup, when – after years of smooth, unharmed operation despite numerous cement-terminated falls – the better parts of my N9’s gorilla glass finally decide to break apart as the phone left the the bike mount mid-ride. It seems the mount broke due to modifications I made as […]

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