Re: grub-mkrescue: Problem with MBR partition table at start of EFI partition

[Chris Murphy]

On Tue, Apr 30, 2019 at 5:43 PM Vladimir 'phcoder' Serbinenko
<address@hidden> wrote:
>
> There is an easy way to check if -k can be used always: have a look at 
> windows install CD/DVD. If it doesn't have partion table then we can drop it 
> as well.

I think there's no partition whatsoever, plain UDF. I have a Microsoft
produced (not OEM) Windows 10 ISO.

blkid:
/dev/loop0: UUID="5d9a00004d532055" LABEL="CCCOMA_X64FRE_EN-US_DV9" TYPE="udf"

mount
/dev/loop0 on /mnt/iso type udf (ro,relatime,utf8)

dmesg
[1277852.561098] UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
[1277852.566766] UDF-fs: Scanning with blocksize 512 failed
[1277852.573609] UDF-fs: warning (device loop0): udf_load_vrs: No anchor found
[1277852.579255] UDF-fs: Scanning with blocksize 1024 failed
[1277852.585615] UDF-fs: INFO Mounting volume 'UDF Volume', timestamp
2018/04/13 00:00 (1000)

So it's a 2048 byte block size (expected) optical image.

sudo dd if=/dev/loop0 bs=1M count=4 2>/dev/null | hexdump -C >
win10-4M-hexdump.txt

That file as win10-4M-hexdump.txt.tbz can be located here for a little
while; if more than the first 4 MiB are needed, let me know.
https://drive.google.com/open?id=1JgPv8EBHDn5A7hTEwewGK1MuFHvHbJnr



-- 
Chris Murphy