[RESOLVED] GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
When you boot up a Pogoplug which has a USB disk attached that is larger than 2TB you get these error messages:
GPT: first_usable_lba incorrect: 22 > 0
part_print_efi: *** ERROR: Invalid GPT ***
GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
part_print_efi: *** ERROR: Invalid Backup GPT ***
and the Pogoplug will refuse to boot Linux from that disk. The only way that worked was to boot the Pogoplug from a smaller disk, even if the rootfs and other partitions were on a 2+TB disk. It is the /boot directory that must be readable by u-boot; the rootfs partition is read by the Linux, so it can be anywhere.
The root cause of this problem is that the u-boot code does not have any support for disks larger than 2TB. These disks must be formatted with a GPT partition table, but the GPT is not the problem; the size of the disk is the problem.
This update has been tested on several large disks, including 3TB and 8TB disks. Also tested with GPT formatted disks smaller than 2TB.
Also in this patch are some changes that will improve the USB disk detection and let u-boot work with some USB disks that it failed on before.
I have created a modified version of uboot.2017.07-tld-1....bodhi.tar, one for Pogo E02 and one for Pogo V4. Both kwb's and the patchfile are in one tarball. Flash this new uboot according to the instuctions here: https://forum.doozan.com/read.php?3,12381 At "A. Flashing Instruction:"
Download link: https://www.dropbox.com/s/5ezx8dljw2kunm1/uboot.2017.07-bigdisk.tar.gz?dl=0
(You can download without logging in or having an account.)
Also attached to this post.
The patchfile applies to this source: u-boot-kirkwood-2017.07-kirkwood-tld-1.zip
When you boot up a Pogoplug which has a USB disk attached that is larger than 2TB you get these error messages:
GPT: first_usable_lba incorrect: 22 > 0
part_print_efi: *** ERROR: Invalid GPT ***
GUID Partition Table Header signature is wrong: 0x0 != 0x5452415020494645
part_print_efi: *** ERROR: Invalid Backup GPT ***
and the Pogoplug will refuse to boot Linux from that disk. The only way that worked was to boot the Pogoplug from a smaller disk, even if the rootfs and other partitions were on a 2+TB disk. It is the /boot directory that must be readable by u-boot; the rootfs partition is read by the Linux, so it can be anywhere.
The root cause of this problem is that the u-boot code does not have any support for disks larger than 2TB. These disks must be formatted with a GPT partition table, but the GPT is not the problem; the size of the disk is the problem.
This update has been tested on several large disks, including 3TB and 8TB disks. Also tested with GPT formatted disks smaller than 2TB.
Also in this patch are some changes that will improve the USB disk detection and let u-boot work with some USB disks that it failed on before.
I have created a modified version of uboot.2017.07-tld-1....bodhi.tar, one for Pogo E02 and one for Pogo V4. Both kwb's and the patchfile are in one tarball. Flash this new uboot according to the instuctions here: https://forum.doozan.com/read.php?3,12381 At "A. Flashing Instruction:"
Download link: https://www.dropbox.com/s/5ezx8dljw2kunm1/uboot.2017.07-bigdisk.tar.gz?dl=0
(You can download without logging in or having an account.)
Also attached to this post.
The patchfile applies to this source: u-boot-kirkwood-2017.07-kirkwood-tld-1.zip