VMWare Environment Very Unstable
Posted on 2008-11-17
Wow, where to start.
I'm inheriting a network that is running VMWare ESX on three physical HP Proliant DL380 Servers.
Server one has dual 3.6 Ghz Intel Xeon processors with 12 Gb of RAM. It's running 1 instance of Windows Server 2003 R2 SP2 with Microsoft Exchange 2003 Standard Edition. As well as 4 instances of Windows XP Pro for remote salespeople to access the Made2Manage client.
Server two has dual 3.2 Ghz Intel Xeon processors with 12 Gb of RAM. It's running 1 instance of Windows Server 2000 SP4 and is used exclusively for the Made2Manage database and SQL engine.
Server three has dual 3.6 Ghz Intel Xeon process with 4 Gb of RAM. It's running 1 instance of Windows Server 2003 R2 SP2 and handles all data storage and printing for the network. It also has 1 instance of Windows XP Pro for the timeclock application.
As an added bonus we have an HP Modular Storage Array with (12) 750Gb drives. All three server use the SAN for the data drives with the third server having a full terrabyte for storage.
Here's the problem. The first and third servers go down almost every day. They crash and when they try to come back up the give VMWare kernel errors. After I reboot them each half a dozen times they will finally boot, but then they are super slow for the next 6 hours after they come back up.
I'm very experience with networks and servers, but I've never dealt with production servers running VMWare ESX and I'm not sure where to start to even look for a solution. The admin that was here before told them that the SAN that he spec'd and purchased was not completely compatible with VMWare, but he had been telling them that for the past 4 months.
This company is experiencing daily downtime of 1 to 4 hours and I need to get this to stop urgently. Any and all help is greatly appreciated.