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Authored by: scared on Dec 08, '05 01:25:32PM

i'm a bit late in replying here, but i just faced the same problem. i used silentaccord's method for setting up a firewire drive with two partitions: hfs+ and fat32. then i plugged it into a windows xp box and reformatted the fat32 partition as ntfs. this worked perfectly in windows, but the mac wouldn't recognize the drive.

the problem, as you were guessing is that the apple partition map still think it's fat32, so it doesn't line up properly. to fix this, i unmounted the drive and used sudo pdisk.

first use e (edit device's map) and your particular drive.

then use p (print the partition table) to get the current setup. the partition that has been reformatted to ntfs should be listed as type: DOS_FAT_32.

use t (change a partition's type) and enter the appropriate partition number. it took me a while to find this part, but the correct type should be Windows_NTFS.

next use w (write the partition table) and q followed by q again to quit out of pdisk.

the drive should automount now…

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Authored by: dhdeeg on Dec 21, '05 09:34:07AM
I gave it a shot though and it keeps saying it can't write to the partition map when I give the 'w' command... Not sure why, made to sure unmount it and tried many times. This is a 10.3.8 machine.
Last login: Wed Dec 31 17:40:00 on ttyp1
Welcome to Darwin!
Put-Workstation-ID-Here-X38-GM:~ schooladmin$ sudo pdisk
Top level command (? for help): e
Name of device: /dev/rdisk1
Command (? for help): p
/dev/rdisk1  map block size=512
   #:                 type name                  length   base      ( size )
   1:  Apple_partition_map Apple                     63 @ 1        
   2:           Apple_Free                            0+@ 64       
   3:            Apple_HFS Apple_HFS_Untitled_2  83623936 @ 262208    ( 39.9G)
   4:           DOS_FAT_32 DOS_FAT_32_Untitled_3  72481856 @ 83886144  ( 34.6G)
   5:           Apple_Free                            0+@ 156368000

Device block size=512, Number of Blocks=156368016
DeviceType=0x0, DeviceId=0x0

Command (? for help): t
Partition number: 4
New partition type: Windows_NTFS
Command (? for help): w
The map has not been changed.
Command (? for help): q
Top level command (? for help): q
The end
Put-Workstation-ID-Here-X38-GM:~ schooladmin$ 

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