What server you're hosted on? You can PM me if you want, I'll be glad to investigate the issue.
We had to reboot several of our servers today for different reasons, and yes, few servers are still in the middle of RAID array rebuild (that's what you're talking about I guess). Servers are usually functional during that, however array rebuild has certain I/O performance impact, and in some cases may require disabling non-critical services in order to keep core functionality unaffected.
Dennis A.
Head of Engineering
WebHostingBuzz.com