Partitioning External Drive


 
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Special Forums Hardware Filesystems, Disks and Memory Partitioning External Drive
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Old 08-06-2009
Partitioning External Drive

I am about to set up another triple boot drive, but this one is connected to my MacBook with a USB adapter. I want to be sure that I do not overwrite data on my laptop's internal drive. This is the command I used for the internal drive, which was found in an Ubuntu forum, but the sizes were changed to match my drive.

diskutil resizeVolume disk0s2 45G "JHFS+" 4-Linux 20G "MS-DOS FAT32" 4-Windows 0b

If memory serves, there may have been a typo on the last character. I thought it was supposed to be a 'G', but I am very new to this.

I assume that the disk0s2 needs to be changed, but I do not know how to tell what the external drive is called. I have looked in Disk Utility and the System Profiler, but there seems to be nothing there. UNIX must be the answer.
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installboot(1M) 														   installboot(1M)

NAME
installboot - install bootblocks in a disk partition SYNOPSIS
installboot bootblk raw-disk-device The boot(1M) program, ufsboot, is loaded from disk by the bootblock program which resides in the boot area of a disk partition. The ufs boot objects are platform-dependent, and reside in the /usr/platform/platform-name/lib/fs/ufs directory. The platform name can be found using the -i option of uname(1). The installboot utility is a SPARC only program. It is not supported on the architecture. users should use installgrub(1M) instead. bootblk The name of the bootblock code. raw-disk-device The name of the disk device onto which the bootblock code is to be installed; it must be a character device which is read- able and writable. Naming conventions for a SCSI or IPI drive are c?t?d?s? and c?d?s? for an IDE drive. Example 1: Installing UFS Boot Block To install a ufs boot block on slice 0 of target 0 on controller 1 of the platform where the command is being run, use: example# installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk /dev/rdsk/c1t0d0s0 /usr/platform/platform-name/lib/fs/ufs directory where ufs boot objects reside. /platform/platform-name/ufsboot second level program to boot from a disk or CD See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ od(1), uname(1), boot(1M), init(1M), kadb(1M), kernel(1M), monitor(1M), reboot(1M), rpc.bootparamd(1M), init.d(4), attributes(5) WARNINGS
The installboot utility fails if the bootblk or openfirmware files do not exist or if the raw disk device is not a character device. 11 Apr 2005 installboot(1M)