Q: Windows bootcamp - partition cannot be mounted
Hey all,
I have been using Windows on my iMac (late 2012, Yosemite 10.10.5) without a problem but today, after i booted MacOS Yosemite (for a simple file control), cannot boot back to Windows again. Didn't have any bootcamp problems before... haven't used any 3rd party disk utility either. The only thing recently I did was increasing Windows partition size 200GB by decreasing MacOS partition via Disk Utility (a month ago, no problem since then, till today)
1. Windows disappeared from Startup Disk
2. Disk utility shows disk0s4 greyed out and cannot be mounted. Moreover, the correct partition size was 700 GB but here its shown as 500GB (which was the old size before increasing it)
3. When i try to reboot with ALT pressed, Windows shows up, but cannot reboot, with a black screen showing “a disk error occurred”
I am not very familiar with any more technicals. I only tried to install “Refind” but cannot succeed anything with it.
I tried your advice above and seems NTFS is there...
one more thing... when I try to verify disk0s4, says "it needs to be repaired". when i hit repair; it says this:
Need my Windows ASAP, what more should i do?
I haven't upgraded to Sierra yet. Should I? Or will it make worse?
I have tons of files on Windows that I need and unfortunately not backed up for awhile anywhere (very sorry about it now).
Please help...
iMac, null
Posted on Oct 6, 2016 6:03 AM
It was not a fairly tale ending, but glad to see some pride (and files, too) was (were) salvaged. Back up, Back up and then some more... .
Posted on Oct 15, 2016 6:49 AM








