Partitioning an external HD using terminal command

[Pmccswim]

I read in a book that I can create three partitions on a drive using this terminal command:

sudo diskutil resizeVolume disk0s2 220g "MS-DOS FAT32" Data 12g \ "MS-DOS FAT32" Windows 0b.

This is supposed to create three partions: one of 220g for running Mac OS, one of 12g for a partition that can be read\written to by both Mac OS and Windows 7, and finally, a partition for the Windows 7 OS. But after I hit return, I get the message:

"MS-DOS FAT32 does not appear to be a valid file system format" Then is says to use diskutil listFilesystems to view supported file systems; however, MS-DOS FAT32 is listed there.

I'm using version 10.6.8. Any ideas on what I'm doing wrong? Thanks.

 

[balamw]

From the man page:

resizeVolume device size [numberOfPartitions] [part1Format part1Name
                part1Size part2Format part2Name part2Size part3Format
                part3Name part3Size ...]

You seem to be missing the numberOfPartitions and everything else is out of order. Also, /dev/disk0s2 refers to your internal drive, partition #3 (which would usually be the Boot Camp partition, yet you say you are trying to do this on an external.

Format names are of the form HFS+, MS-DOS, etc.; a
                          list of formatable filesystems and common aliases is
                          available from the [B]listFilesystems[/B] verb.

so try

diskutil listFilesystems

to see what your system expects.

I would expect:

sudo diskutil resizeVolume [B]device[/B] 2 "MS-DOS FAT32" Data 220g "MS-DOS FAT32" Data 12g

to be more appropriate, but make sure you understand what to put in as device.

B

 

[Pmccswim]

Thanks

From the man page:

resizeVolume device size [numberOfPartitions] [part1Format part1Name
                part1Size part2Format part2Name part2Size part3Format
                part3Name part3Size ...]

You seem to be missing the numberOfPartitions and everything else is out of order. Also, /dev/disk0s2 refers to your internal drive, partition #3 (which would usually be the Boot Camp partition, yet you say you are trying to do this on an external.

Format names are of the form HFS+, MS-DOS, etc.; a
                          list of formatable filesystems and common aliases is
                          available from the [B]listFilesystems[/B] verb.

so try

diskutil listFilesystems

to see what your system expects.

I would expect:

sudo diskutil resizeVolume [B]device[/B] 2 "MS-DOS FAT32" Data 220g "MS-DOS FAT32" Data 12g

to be more appropriate, but make sure you understand what to put in as device.

B

Thanks, I will try that.

 

[Pmccswim]

Thanks

Thanks, B, I shall try that.