Have you check to make sure there are not any pending operations? Run "xe task-list" from the XenCenter console or via SSH of the host.
What kind of primary storage are you using? I would also check the SMlog file(located /var/log/SMlog) on the host. When these issues occur, it's easier for me to take cloudstack out of the picture and try the start/stop on the host/XenCenter. After you resolved the issue, I would shut the machine back down and start it back up with CS. -----Original Message----- From: William Jiang [mailto:william.ji...@manwin.com] Sent: Thursday, May 16, 2013 3:50 PM To: Chip Childers; users@cloudstack.apache.org Subject: RE: issue about windows server 2008 VM can NOT start Thanks for reminding, I will provide error message in text. Hi, I need help for one of our windows server 2008 R2 instance which running on cloudstack 3.0.2+xenserver 6.0.2. As staring from yesterday, the status for this vm in cloudstack UI displayed as “stopping”, but we knew the VM is still up and running. Then the vm was down and status changed to “stopped” automatically. When I tried to start the VM, it failed and getting error as following in management-server log: 2013-05-16 12:04:12,105 DEBUG [xen.resource.XenServer56FP1Resource] (DirectAgent-383:null) Created VM 9d21618f-a75b-2a0f-e7bd-cd44e0554e90 for i-4-34-VM 2013-05-16 12:04:12,381 WARN [xen.resource.CitrixResourceBase] (DirectAgent-383:null) Unable to start i-4-34-VM due to 2013-05-16 12:04:12,463 DEBUG [xen.resource.CitrixResourceBase] (DirectAgent-383:null) The VM is in stopped state, detected problem during startup : i-4-34-VM And in cloudstack UI, I got the error as following: "Unable to create a deployment for VM[user|i-4-34-VM]" If you logged in xencenter, you will find the vm system disk “ROOT-34” doesn’t bind to any Virtual Machine. Any ideas or suggestions will be great appreciated. Thanks, William This e-mail may be privileged and/or confidential, and the sender does not waive any related rights and obligations. Any distribution, use or copying of this e-mail or the information it contains by other than an intended recipient is unauthorized. If you received this e-mail in error, please advise me (by return e-mail or otherwise) immediately. Ce courrier électronique est confidentiel et protégé. L'expéditeur ne renonce pas aux droits et obligations qui s'y rapportent. Toute diffusion, utilisation ou copie de ce message ou des renseignements qu'il contient par une personne autre que le (les) destinataire(s) désigné(s) est interdite. Si vous recevez ce courrier électronique par erreur, veuillez m'en aviser immédiatement, par retour de courrier électronique ou par un autre moyen.