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I have a 2GB USB stick from a free promotional giveaway. It has a second "partition" with Autorun for advertising every time I insert it in a computer. I know I can disable autorun, but how can I completely erase the disk? Disk Utility on OS X thinks it's two separate disks, see partial output below. I already tried dd.

$ diskutil list
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:        CD_partition_scheme                        *2.7 MB     disk1
   1:              CD_ROM_Mode_1 Autorun                 233.5 KB   disk1s0
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *2.1 GB     disk2
   1:               Windows_NTFS Untitled                2.1 GB     disk2s1

$ sudo dd if=/dev/zero of=/dev/disk1
dd: /dev/disk1: Permission denied
Elliott B
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1 Answers1

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You will need to use a Windows operating system for this operation because the tools to make these changes are made for Windows. See my write-up at the link below for what it takes to place one of those partitions on a drive. The same processes to access and make a partition allows you to remove your partition. There will be a program specifically for the drive you are using. First, you'll need to use another program called ChipGenius and follow a few steps to determine what the exact model of the drive is you have and then what tool to use to modify it.

How do I make a USB partition so no one can erase it

seizethecarp
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