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javasizedrive

Get Drive Size in Java 5

I want to get the size of a drive (or UNC path pointing to a partition would be nice, but not required), as well as free space for said drive (or UNC path). This doesn't need to work cross platform; only in Windows.

I know it's easy to do in Java 6, but that's not an option; I'm stuck with Java 5.

I can get the free space available by doing:

cmd.exe /c Z:\ /-c

or

cmd.exe /c \\server\share /-c

and just parsing out the resulting bytes free. However I can't seem to find a way to get the total drive size.

Any suggestions?

Solution

  • One way to do it would be to use fsutil on the command line. It returns something like this:

    D:\>fsutil fsinfo ntfsinfo c:
NTFS Volume Serial Number :       0xd49cf9cf9cf9ac5c
Version :                         3.1
Number Sectors :                  0x0000000004a813ff
Total Clusters :                  0x000000000095027f
Free Clusters  :                  0x00000000002392f5
Total Reserved :                  0x0000000000000490
Bytes Per Sector  :               512
Bytes Per Cluster :               4096
Bytes Per FileRecord Segment    : 1024
Clusters Per FileRecord Segment : 0
Mft Valid Data Length :           0x000000000e70c000
Mft Start Lcn  :                  0x00000000000c0000
Mft2 Start Lcn :                  0x0000000000000010
Mft Zone Start :                  0x0000000000624ea0
Mft Zone End   :                  0x0000000000643da0

    Multipy your number of sectors times the bytes per sector to get your size.