I have an USB stick device which has an HFS volume with GPT partition table. I want to write an iso image to the stick with:
$ sudo dd if=debian-8.2.0-amd64-CD-1.iso of=/dev/sdb bs=8M
Command completed successfully but when I re-insert usb stick, it still tries to use information from GPT partition table.
So, I used
gdisk utilitiy’s zap (destroy) GPT data structures option to remove GPT partition like below:
sudo gdisk /dev/sdb GPT fdisk (gdisk) version 0.8.10 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Command (? for help): x Expert command (? for help): z About to wipe out GPT on /dev/sdb. Proceed? (Y/N): Y GPT data structures destroyed! You may now partition the disk using fdisk or other utilities. Blank out MBR? (Y/N): Y
After that I created a new DOS partition through
fdisk and write iso image with
dd. However, when I try to reinsert USB stick, it still identified with old information (as an hfsplus volume) in kernel:
GPT:Alternate GPT header not at the end of the disk. GPT:1390003 != 15654847 GPT: Use GNU Parted to correct GPT errors. sdb: sdb1 sdb2 sdb3 sd 13:0:0:0: [sdb] Attached SCSI removable disk ISOFS: Unable to identify CD-ROM format. hfsplus: invalid secondary volume header hfsplus: unable to find HFS+ superblock
Restarting the Linux system doesn’t make sense too. So, how can I make a fresh MBR disk?