hi ,
its the first time i use technet for a question , most of the time the answer is just here :) , but not this time ...
i found partial answers on my question , but i'm still in the dark.
this is my problem :
for our customers we use a backup server with the ISCSI software target application of windows.
these machines that we backup , are virtual machines running on windows server 2012 with Hyper-v
the machines are getting backed up with Windows Server Backup , point is we are not ussing any external software.
so the backup solution we are using is al windows software.
now, everything worked great for a few weeks , but since a few days i get the "not enough disk space error" on all of our machines.
so the first thing i did to troubleshoot was giving the backup disk (ISCSI) a drive letter and checked the properties , indeed the disk is "full"
then i looked inside and looked at the properties of the backup folder and then it all started.
for example the target disk is 100 GB , the backup folder inside is 70 GB , so there's 30 GB free , but yet the properties say i only have 500 Mb left ...
so after some searching i noticed , even as the shadow copy's is not enabled , it is using up 30 GB of my HDD for shadow copy's ...
after some googling i came to the answer that Windows Server backup is using shadow copy's as the methode for incremental backups ...
fine by me , really , thats not the issue , the issue is that windows "thinks" it can still backup because there is 30 Gb free "since only 70 is used" but in fact the disk is full ...
first time i had the issue my solution was manually changing the settings of shadow copy to force it to use only a amount of data , but windows overrulles the settings and continues anyway with filling up data , and i lost my retention in the proces :)
can anyone give me a logical explenation about this problem , its important that i know how windows server backup "thinks" becus we have allot of customers using this and i want to be shure that backups are working perfectly ...
if i can give extra information to help analyse the problem , you just have to ask :)
