libaio

[Boris-Barboris via Digitalmars-d-announce]

https://github.com/Boris-Barboris/libaio/blob/master/source/libaio/package.d
https://code.dlang.org/packages/libaio
If you need to write some shady block-level stuff for Linux 
libaio this thin Derelict loader can save a day of your time.