Hyper-V Backup question

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- wanted backup a hyper-v host (windows server 2008 core, x.64, sp2) according kb http://support.microsoft.com/kb/958662/en-us
- file server data on a file server vm (windows server 2008, x.64, sp2) on dynamic disk within vm. reason it's possible have extend volume in future, , that's possible dynamic disks.
- have seen surprise windows backup takes our vm offline during windows backup operation! there little remark in http://support.microsoft.com/kb/958662/en-us that dynamic disks cannot backed online.

my question: change windows server 2008 r2? r2 able backup hyper-v host without taking offline windows 2008 servers vm's contain dynamic disks?

thank in advance help
franz 

hi,

 

the downtime when hyper-v perform "save state" depends on number of vms , applications running inside vms. if don’t want have downtime, may perform follow suggetion:

 

understanding online , offline backups

 

whether backup performed online or offline depends on whether backup can performed without downtime.

an online backup can performed no downtime on running virtual machine when of following conditions met:

· integration services installed , backup integration service has not been disabled.

· disks being used virtual machine configured within guest operating system ntfs-formatted basic disks. virtual machines use dynamic disks or fat32 file system prevent online backup being performed.

· volume shadow copy service must enabled on volumes used virtual machine specific configuration. each volume must storage location shadow copies , mapping must available hyper-v vss writer. in other words, shadow copy storage of c: should on c:, shadow copy storage of d: should on d:, on forth.

if online backup cannot performed, offline backup taken. type of backup results in degree of downtime. variety of factors can affect time required take offline backup. if virtual machine running or paused, put saved state part of offline backup process. after backup completed, virtual machine returned existing state.

 

for more information, can refer to:

 

backing hyper-v virtual machines

http://blogs.technet.com/virtualization/archive/2008/08/29/backing-up-hyper-v-virtual-machines.aspx

 

 

best regards,

vincent hu

 



Windows Server  >  Hyper-V



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