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No extents were found for the plex

No extents were found for the plex

Yesterday a friend asked me to help him troubleshoot a problem he was having when he was attempting to setup RAID 1 also known as mirroring.  He wanted to mirror the Operating System hard drive to a second hard drive and told me he cant get the System Reserved partition mirrored.

I asked him to show me exactly how he was attempting to perform this task and as I suspected he mirrored the (Boot, Page, Crash Dump) partition which is most commonly known as the C: drive first.

Next he would attempt to mirror the (system Reserved Partition) which by default is 100 MB in physical size.

I remember when I tried this several years ago myself  I encountered the same problem and with some experimenting I figured out how to do it and below are the steps.

First if you already created a mirror in windows vista or windows 7 go ahead and break it.

Now back to square one here are the steps to mirroring windows vista or windows 7.

Step 1
Assuming you already know how to mirror drives. (Software Mirroring or Software RAID 1)
IF YOU DON’T KNOW HOW TO MIRROR DRIVES it is in your best interest to ask somebody that knows how to mirror drives to walk you through the process or better yet do it with you so you learn without screwing up.

Step 2
Mirror the (System Reserved) partition first.

After this completes, reboot the computer then mirror the C: drive then after the Resynching completes reboot again.

Now both partitions will be mirrored.

Final thought on this.
What does the error No extents were found for the plex mean?
I still don’t know.



Posted in Microsoft, Questions & Answers, RAID 1, RAID Levels, Software Raid, Windows 7, Windows Vista0 Comments