I thinking that disabling the Linux write cache could help here:
Not all system’s belong to the same “turn-on write-back caching” recommendation group as write-back caching caries a risk of data loss in the event such as power failure etc. In the event of power failure, data residing in the hard drive’s cache do not get a chance to be stored and a lost. This fact is especially important for database system. In order to disable write-back caching set write-caching to 0:
# hdparm -W0 /dev/sda /dev/sda: setting drive write-caching to 0 (off) write-caching = 0 (off)
