Monthly Archives: December 2014

Fixing Ubuntu SSD Encryption Speed

TL;DR: A default install of Ubuntu 12.04 LTS with an encrypted filesystem will not use the AES-NI features of your Intel CPU for hardware accelerated encryption. I recently found a two year old bug after searching on and off since I started using Ubuntu 12.04 LTS that reports slow SSD speeds when using dm-crypt, even though with AES-NI speeds should be close to unencrypted. Turns out its a simple kernel configuration issue, which the Ubuntu devs have seemingly declined to … Continue reading

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