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Setting Up a Disk Partition Table to Be the Same As on Another Disk

Phillip Wu, August 2006

Often it is necessary to set up a partition table for a disk to be the same as on another disk, for example, where the disks are mirrored. This can be achieved by using the format utility. In the instructions that follow, the original disk is called disk a and the second disk (which will have the same partition table) is called disk b.

format
<select disk a>  (Select disk a from the list displayed.)
partition
print   (Print out the partition table to list the partition table.)
name
rootdisk   (Pick a name of your choice.)
quit   (Go back to the format menu.)
disk   (Go to the menu that allows you to select disk b.)
<select disk b>   (Select disk b from the list displayed.)
partition   (Print out the partition table before changing.)
select
--Pick rootdisk   (Pick from the menu the name you gave above.)
label   (Write out the partition table to disk.)
quit   (Go back to the format menu.)
quit   (Exit format.)

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