I have two servers both Lenovo TS130s with 12GB of RAM and Xeon processors. One has an Adaptec RAID controller with mirrored 500GB and the other just has a single hard drive for the OS and VMs. Both machines have a backup hard drive dedicated to backups only.
Server A, with the RAID controller takes around 1 hour to do a vzdump backup. It is also running PVE 3.1.
Server B, without a controller the vzdump takes around 10 hours. Running PVE 2.3.
Besides the RAID controller, the only other difference in the configs are the hard drive on Server B does not have the hard drive cache enabled. They're both backing up a similar amount of data as well.
Why would server B take so long to do it's backups? Also, does the hard drive cache even come into play here? Is there a benefit of using it without a raid controller?
Thanks.
Server A, with the RAID controller takes around 1 hour to do a vzdump backup. It is also running PVE 3.1.
Server B, without a controller the vzdump takes around 10 hours. Running PVE 2.3.
Besides the RAID controller, the only other difference in the configs are the hard drive on Server B does not have the hard drive cache enabled. They're both backing up a similar amount of data as well.
Why would server B take so long to do it's backups? Also, does the hard drive cache even come into play here? Is there a benefit of using it without a raid controller?
Thanks.