[CentOS] Dell PERC H800 commandline RAID monitoring tools

We're looking for tools to be used in monitoring the PERC H800 arrays on a set of database servers running CentOS 5.5.

We've installed most of the OMSA (Dell monitoring) suite.

Our current alerting is happening through SNMP, though it's a bit hit or miss (we apparently missed a couple of earlier predictive failure alerts on one drive).

OMSA conflicts with mega-cli, though we may find that the latter is the more useful package. Both are pretty byzantine, the Dell stuff simply doesn't have docs (in particular: docs on how to interpret the omconfig log output).

Ideally we'd like something which could be run as a Nagios plugin or cron job providing information on RAID status and/or possible disk errors. Probably both, actually.

Thanks in advance.