Defragmenting a Volume Containing Shadow Copies
Defragmenting the source volume causes the difference file to increase. If the difference file increases beyond the allocated space, you might lose previous
versionsofsomefiles.Evenwitha16KBclustersize,theshadowcopydifferencefilewillincrease.Ifthedifferenceincreasestoomuch(greaterthanthe
maximum set), shadow copies will be deleted.
If you do not have to keep shadow copies, delete them before defragmenting to improve the performance of the defragmentation. See "Deleting a Shadow
Copy."
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