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:
BSD: not present
APM: not 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
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