One might need superuser autority for reading the device file: device=/dev/sdd /sbin/fdisk -l "$device" xorriso -indev stdio:"$device" -report_system_area plain 1. Xubuntu iso file: $ ls -l groovy-desktop-amd64.iso -rw------- 1 olle olle 1814708224 okt 14 02:10 groovy-desktop-amd64.iso $ md5sum groovy-desktop-amd64.iso 0cdd29dca108971e8285d277b916179c groovy-desktop-amd64.iso $ LANG=C sudo /sbin/fdisk -l groovy-desktop-amd64.iso Disk groovy-desktop-amd64.iso: 1,7 GiB, 1814708224 bytes, 3544352 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type groovy-desktop-amd64.iso1 64 3533735 3533672 1,7G Microsoft basic data groovy-desktop-amd64.iso2 3533736 3543687 9952 4,9M EFI System groovy-desktop-amd64.iso3 3543688 3544287 600 300K Microsoft basic data 2. 'no-persistent' system in USB pendrive (after successful boots in HP Elitebook 8560p) Notice the complaint about GPT PMBR size mismatch. $ LANG=C sudo /sbin/fdisk -l /dev/sdc GPT PMBR size mismatch (3544351 != 60970488) will be corrected by w(rite). Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 3544351 MBR partition : 2 0x80 0x00 0 1 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 3544288 3544351 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 3. Cloned system in the same USB pendrive (virgin, not booted yet) $ LANG=C sudo /sbin/fdisk -l /dev/sdc GPT PMBR size mismatch (3544351 != 60970489) will be corrected by w(rite). Disk /dev/sdc: 29,1 GiB, 31216890880 bytes, 60970490 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 3544351 MBR partition : 2 0x80 0x00 0 1 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 3544288 3544351 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 4. Cloned system in the same USB pendrive (booted once in HP 8560p in BIOS mode, reached desktop with 'safe graphics' due to problems with graphics) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 c110c8de2eb34a5f87346596ebf780a5 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 5. Cloned system in the same USB pendrive (booted once in HP 8560p in BIOS mode, failed to boot second attempt) Nothing should have happened to the partition table, because boot did not even reach to grub. See 4. 6. Cloned system in the same USB pendrive (virgin, not booted yet) (Should match 3.) $ LANG=C sudo /sbin/fdisk -l /dev/sdc GPT PMBR size mismatch (3544351 != 60970489) will be corrected by w(rite). Disk /dev/sdc: 29,1 GiB, 31216890880 bytes, 60970490 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 3544351 MBR partition : 2 0x80 0x00 0 1 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 3544288 3544351 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 7. Cloned system in the same USB pendrive (booted once in Lenovo V130 in UEFI mode, reached desktop in normal mode) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 3ba97a76318b4710a528a172ed790834 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 8. Cloned system in the same USB pendrive (booted twice in Lenovo V130 in UEFI mode, reached desktop in normal mode) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 3ba97a76318b4710a528a172ed790834 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 9. Cloned system in the same USB pendrive (booted twice in Lenovo V130 in UEFI mode, failed now to boot in HP Elitebook 8560p in BIOS mode) Nothing should have happened to the partition table, because boot did not even reach to grub. See 8. 10. Cloned system in the same USB pendrive (virgin, not booted yet) (Should match 3.) $ LANG=C sudo /sbin/fdisk -l /dev/sdc GPT PMBR size mismatch (3544351 != 60970489) will be corrected by w(rite). Disk /dev/sdc: 29,1 GiB, 31216890880 bytes, 60970490 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 3544351 MBR partition : 2 0x80 0x00 0 1 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 3544288 3544351 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 11. Cloned system in the same USB pendrive (booted once in Dell Precision M4800 in BIOS mode, reached desktop in normal mode) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 ca1c30e105bd40dfa7dab4d9ef81a795 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 12. Cloned system in the same USB pendrive (booted twice in Dell Precision M4800 in BIOS mode, reached desktop in normal mode) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 ca1c30e105bd40dfa7dab4d9ef81a795 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 13. Cloned system in the same USB pendrive (booted twice in Dell Precision M4800 in BIOS mode, failed now to boot in HP Elitebook 8560p in BIOS mode) Nothing should have happened to the partition table, because boot did not even reach to grub. See 12. 14. Cloned system in the same USB pendrive (booted twice in Dell Precision M4800 in BIOS mode, failed to boot in HP Elitebook 8560p in BIOS mode, finally booted in Dell Precision M4800 in UEFI mode without any problems) $ LANG=C sudo /sbin/fdisk -l /dev/sdc Disk /dev/sdc: 29,1 GiB, 31216890368 bytes, 60970489 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 5F95C427-857C-4F99-A8DA-0BDAD813137F Device Start End Sectors Size Type /dev/sdc1 64 3533735 3533672 1,7G Microsoft basic data /dev/sdc2 3533736 3543687 9952 4,9M EFI System /dev/sdc3 3543688 3544287 600 300K Microsoft basic data /dev/sdc4 3547136 60970425 57423290 27,4G Linux filesystem $ sudo xorriso -indev stdio:/dev/sdc -report_system_area plain GNU xorriso 1.5.3 : RockRidge filesystem manipulator, libburnia project. xorriso : NOTE : Loading ISO image tree from LBA 0 xorriso : UPDATE : 734 nodes read in 1 seconds libisofs: NOTE : Found hidden El-Torito image for EFI. libisofs: NOTE : EFI image start and size: 883434 * 2048 , 9952 * 512 xorriso : NOTE : Detected El-Torito boot information which currently is set to be discarded Drive current: -indev 'stdio:/dev/sdc' Media current: stdio file, overwriteable Media status : is written , is appendable Boot record : El Torito , MBR protective-msdos-label grub2-mbr cyl-align-off GPT Media summary: 1 session, 886088 data blocks, 1731m data, 27.4g free Volume id : 'Xubuntu 20.10 amd64' System area options: 0x00004201 System area summary: MBR protective-msdos-label grub2-mbr cyl-align-off GPT ISO image size/512 : 3544352 Partition offset : 16 MBR heads per cyl : 0 MBR secs per head : 0 MBR partition table: N Status Type Start Blocks MBR partition : 1 0x00 0xee 1 60970488 GPT : N Info GPT disk GUID : 27c4955f7c85994fa8da0bdad813137f GPT entry array : 2 248 separated GPT lba range : 64 60970425 60970488 GPT partition name : 1 490053004f003900360036003000 GPT partname local : 1 ISO9660 GPT partition GUID : 1 27c4955f7c85994fa8db0bdad813137f GPT type GUID : 1 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 1 0x1000000000000001 GPT start and size : 1 64 3533672 GPT partition name : 2 41007000700065006e006400650064003200 GPT partname local : 2 Appended2 GPT partition GUID : 2 27c4955f7c85994fa8d80bdad813137f GPT type GUID : 2 28732ac11ff8d211ba4b00a0c93ec93b GPT partition flags: 2 0x0000000000000000 GPT start and size : 2 3533736 9952 GPT partition name : 3 4700610070003100 GPT partname local : 3 Gap1 GPT partition GUID : 3 27c4955f7c85994fa8d90bdad813137f GPT type GUID : 3 a2a0d0ebe5b9334487c068b6b72699c7 GPT partition flags: 3 0x1000000000000001 GPT start and size : 3 3543688 600 GPT partition name : 4 GPT partition GUID : 4 ca1c30e105bd40dfa7dab4d9ef81a795 GPT type GUID : 4 af3dc60f838472478e793d69d8477de4 GPT partition flags: 4 0x0000000000000000 GPT start and size : 4 3547136 57423290 Finally checking the ext4 file system after this adventure: $ LANG=C sudo e2fsck -f /dev/sdc4 e2fsck 1.44.1 (24-Mar-2018) Pass 1: Checking inodes, blocks, and sizes Pass 2: Checking directory structure Pass 3: Checking directory connectivity Pass 4: Checking reference counts Pass 5: Checking group summary information writable: 92/1795200 files (10.9% non-contiguous), 157239/7177911 blocks