forum admins ..please move this thread to Open Systems, more people can assist Stuart there.

Thanks

ThX .. .. I was starting to believe I was the only one that noticed this thread

Stuart,

is it clustered environment ?

I've moved the thread as recommended.

Thanks,
Erich

well windows orders physical disk numbers based on the LUN number of the LUN presented. Normally the physical disk order should not change. If for some reason the LUN number of your devices changed on the FA port then windows would then shuffle around the physical disk order based on the new LUN #'s. not sure if that is what happened. but the signature has nothing to do with how windows orders disk numbers it is all based on the LUN # of the disk from the storage.

StuartSav can you please help us in helping you ??

If you still have issues, could you please answer the questions that Dynamox (and others) posted here ?? I think they need your assistence in solving your probs

Correct, LUN addresses or disk numbers (as Windows represents them) are of no concern, since the windows signature matters. Just that signature matters ! It the sig that makes the server recognise the vdisk and the data is available. The only thing is that you might need to assign a drive letter, since that info is stored in the registry and not on the disk itself, so if you hae a cluster with 2 nodes, you initially need to set the drive letters as they should be. After that, the order of LUN address doesn't matter.