You can get this information with the PSINFO utility available on the link below.
http://technet.microsoft.com/en-us/sysinternals/bb896649.aspx
Sample command and output:
psinfo \\MyServerName -D disk
PsInfo v1.73 - Local and remote system information viewer
Copyright (C) 2001-2005 Mark Russinovich
Sysinternals - http://www.sysinternals.com
System information for \\MyServerName:
Volume Type Format Label Size Free Free
A: Removable 0.0%
C: Fixed NTFS MyServer_C 19.99 GB 14.92 GB 74.7%
D: Fixed NTFS MyServer_D 12.00 GB 9.41 GB 78.5%
Z: CD-ROM 0.0%