--------------------- CRITICAL ERRORS START HERE ---------------------
[2012-03-14 15:52:12] Syslog log, : Mar 14 15:50:01 gem kernel: I/O error: dev 08:41, sector 0
---------------------- CRITICAL ERRORS END HERE ----------------------
This critical e-mail indicates a problem with one of the harddrives on the AMETHYST server.
Please contact Datatex Support to investigate.
Also see forum post: AMETHYST 1.5: Critical error log:gem kernel: I/O error:dev
{Under investigation}