Upgrading Win Server 2008 R2 to Win Server 2012

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i'm trying upgrade production server 2008 r2 standard 2012 standard. compatibility check reports no issues , install progresses 1 expect (i green tick-marks each stage of upgrade). gets last part of upgrade apparently clean-up of files used during installation. before final reboot message pops saying "installing windows cancelled. setup can't continue. computer restart, , previous version of windows restored". server reboots , rolls 2008 r2. there's nothing in error log (it's empty) , don't receive indication of problem during install i've no idea problem or how troubleshoot it. i've performed other upgrades without problems. server hyper-v server , doesn't run other software it's microsoft through , through - nothing out of ordinary.

does know final task during upgrade 2012 , why cause rollback of server? can't see why clean-up of setup files cause such serious problem upgrade need rolling back. infact i'm pretty sure if prevent rollback server boot 2012 without problem. strange (and little frustrating) particularly error message gives no clue cause of problem.

after 9 attempts got source of problem - disk space. though made sure server had minimum amount of free space required 2012 install it looks wasn't enough. temporarily removed swap file server increasing free disk space 32gb , did trick. guess failure occured when setup program deleting files (as deleting files seems use more disk space). information out other adopters! :-)


Windows Server  >  Windows Server 2012 Setup



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