Thanks for the very detailed response. Your thoughts with regard to the likely reason for the rebuild failure are pretty much the same as mine. The main issue I face is trying to identify the other potentially failing drives within this particular vdisk as nothing was shown that I could see in the store.log zip file I was given for review with regard to other drives having issues. I guess it will be a case of flattening the vdisk. Rebuilding it and seeing if it throws any further errors. Thanks for the prompt response.
Regards
Adam
Regards
Adam