• Seems more like IO issues than anything else. IS the user DB and the Distribution DB on the same controller? The log files too?

    The events that are thrown write now could mean that cache might be disabled, but since this started throwing now, that should not be the only issue. RAID 5 is good depending on what you are using it for.

    For write-intensive applications, RAID 1 or RAID 1+0 are probably better choices (albeit higher in terms of hardware cost), as the performance of RAID 5 will begin to substantially decrease in a write-heavy environment.

    Also keep in mind that the User DB and the distribution DB uses Random right. Only the log is sequential right. Raid 5 is better for sequential rights.

    Just my 2 cents

    -Roy