Hi!
I just wrote GRML 96 Full 2013.02 to a new USB stick and wanted to adjust the partition table. But that wasn't valid (I'll demonstrate using the ISO):
------------------------------------------------------------------------ $ fdisk -l /sw/archive/grml/grml96-full_2013.02.iso
WARNING: GPT (GUID Partition Table) detected on '/sw/archive/grml/grml96-full_2013.02.iso'! The util fdisk doesn't support GPT. Use GNU Parted.
$ gdisk -l /sw/archive/grml/grml96-full_2013.02.iso GPT fdisk (gdisk) version 0.8.5
Partition table scan: MBR: MBR only BSD: not present APM: not present GPT: present
Found valid MBR and GPT. Which do you want to use? 1 - MBR 2 - GPT 3 - Create blank GPT
Your answer: 1 Warning! Main partition table overlaps the first partition by 34 blocks! You will need to delete this partition or resize it in another utility.
Warning! Secondary partition table overlaps the last partition by 33 blocks! You will need to delete this partition or resize it in another utility. Disk /sw/archive/grml/grml96-full_2013.02.iso: 1497088 sectors, 731.0 MiB Logical sector size: 512 bytes Disk identifier (GUID): EE7463AF-ED0A-4537-A878-963CCF70DFD9 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1497054 Partitions will be aligned on 2048-sector boundaries Total free space is 0 sectors (0 bytes)
Number Start (sector) End (sector) Size Code Name
$ gdisk -l /sw/archive/grml/grml96-full_2013.02.iso GPT fdisk (gdisk) version 0.8.5
Partition table scan: MBR: MBR only BSD: not present APM: not present GPT: present
Found valid MBR and GPT. Which do you want to use? 1 - MBR 2 - GPT 3 - Create blank GPT
Your answer: 2 Using GPT and creating fresh protective MBR. Warning! Main partition table overlaps the first partition by 34 blocks! You will need to delete this partition or resize it in another utility. Disk /sw/archive/grml/grml96-full_2013.02.iso: 1497088 sectors, 731.0 MiB Logical sector size: 512 bytes Disk identifier (GUID): 7A9EDD46-5620-4D0E-B375-F3D2B5CB6FC1 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1497054 Partitions will be aligned on 64-sector boundaries Total free space is 642 sectors (321.0 KiB)
Number Start (sector) End (sector) Size Code Name 2 1459520 1461247 864.0 KiB 0700 卉䡏批楲d敶╛嵤›搥 ------------------------------------------------------------------------
We'll I can't read Chinese, maybe somebody can translate? ;-)
The stick boots OK in MBR mode on a SONY VAIO with UEFI.
I found strange partition tables on other ISOs, even older ones.
Can you investigate how these partition tables are generated and fix that? It would be useful if you could change them on the stick with fdisk.
Thank you! Lupe Christoph
PS: I'll use grml2usb for now.