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Change Content hint of single partition

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Change Content hint of single partition

Subject: Change Content hint of single partition
From: "Imran" <email@hidden>
Date: Tue, 22 Feb 2005 15:41:26 +0530

Hi,

I have 2 partitions named Snap1 and Snap2 on the a disk /dev/rdisk1
and want to change ContentHint of one partition to MACOSX_MyContent
instead of Apple_HFS, so that my driver gets loaded only for that
particular partition whose ContentHint matches. How can I change the content
hint of single partition out of 2 partitions on a disk.

I have tried this using pdisk but it  changes the partition type of whole
disk to MACOSX_MyContent and all the partitions disappear for /dev/rdisk1.
Steps taken to do the same are
# pdisk
Top:level command (? for help): e // to edit the partition
Top:level command (? for help): i // to initialize the disk /dev/rdisk1
Top:level command (? for help): t // to change partition type
Top:level command (? for help): w // to write the partition map

Below is the output of pdisk after changing partition type:

/dev/rdisk1  map block size=512
   #:                 type name                  length   base      ( size )
   1:  Apple_partition_map Apple                     63 @ 1       
   2:     MACOSX_MyContent Extra              143374680 @ 64        ( 68.4G)

Device block size=512, Number of Blocks=143374744
DeviceType=0x0, DeviceId=0x0

/dev/rdisk0  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  64961408 @ 262208    (
31.0G)
   4:           Apple_Free                            0+@ 65223616
   5:            Apple_HFS Apple_HFS_Untitled_3  64961408 @ 65485760  (
31.0G)
   6:           Apple_Free                            0+@ 130447168
   7:            Apple_HFS Apple_HFS_Untitled_4  13252672 @ 130709312 ( 
6.3G)
   8:           Apple_Free                            0+@ 143961984
   9:            Apple_HFS Apple_HFS_Untitled_5  12077344 @ 144224128 ( 
5.8G)
  10:           Apple_Free                            0+@ 156301472

Device block size=512, Number of Blocks=156301488
DeviceType=0x0, DeviceId=0x0

Thanks and Regards,
Imran

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