Bug#693891: Fails to boot in UEFI mode on Dell PowerEdge R520
Hi,
out of curiosity i compared systemrescuecd-x86-3.2.0.iso and
debian-wheezy-amd64-efi-test5.iso.
One important difference is that systemrescuecd has no MBR or GPT.
The whole system area is filled with zeros, where test5 is generously
equipped with hard disk partition tables. I see MBR, GPT, and APM.
BIOS should ignore this region if it is presented on CD. I am not
sure what EFI is supposed to do in this case.
In any case, test5 looks as if it could be hit by the bug from 1.2.4
that is fixed in 1.2.6.
The MBR bears a single partition of type 0x00. (I currently riddle how
this could happen. The known bug zeroized partion slots 2 to 4.)
Proposal for a test:
Overwrite the first 32768 bytes of debian-wheezy-amd64-efi-test5.iso
by zero bytes. Burn it to CD and try to boot from it.
If this succeeds, then Steve could build test6 with xorriso-1.2.6
and i would have a look at it whether it is more plausible as disk
image. As soon as this is achieved, one could retry booting the
improved image from CD, despite its partition table equipment.
Have a nice day :)
Thomas
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