This is the first time I've seen SP1 not install on several 2008R2 servers. The error is:
I've tried a few times after doing a couple of steps I found online:
1. Run DISKPART
2. automount enable
4. Install SP1
Ensure that the System Reserved partition is marked active (you can do this in Disk Management or DISKPART) & If you have a 100MB System Reserved partition and it is marked active, give the partition a drive letter and reattempt the service pack installation
Any help is appreciated. Thank you.