Can't create Shadow copy for D Data disk on C System disk Windows Server 2008R2

when attempt enable shadow copies d: data drive/volume on c: system drive volume the message:  failed create storage area association error 8x8004231d: specified shadow copy storage association in user , can't deleted.

i had never enabled shadow copies on server before , volumes show "disabled". suspect application may have created them.

i found technet post related problem recommended:

run vssadmin delete shadowstorage /for=c: /on=c:
run vssadmin add shadowstorage /for=c: /on=d: /maxsize=2500mb
note: if volume shadow copy work, step above delete snapshots.

i ran: vssadmin add shadowstorage /for=d: /on=c: /maxsize=60000mb

and got in response: maximum number of shadow copy storage associations reached.

i'm reluctant use delete shadowstorage above, because i'm not sure created phantom shadow copy on c: seems preventing me enabling shadow copies of d: on c:

at command line ran: diskshadow , command: list shadows all. gave result indicating there shadow copies. unfortunately don't know how results text , won't allow me post , image of here until account "verified".

any insight how fix appreciated.

thanks, lee

please check once event id 12297—vss shadow copy creation , storage space availability

caution: when change location of shadow copy storage area, previous shadow copies deleted.

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