Hi, David
The similar thing we met is some DVD+R/DVD-R discs would read fail with
DVD-Only drive if we try to read a lot of sectors(65535) one time. But using
DVD Combo drive would be successful. Legacy and UEFI boot all have such issues,
which is different with your description.
After experiments, I found if you split it to small sectors, such as 0x200, it
would be ok. You can have a try to see if I am right.
As for BIOS version, you have to consult HP, Acer, Asus for the bios vendor. It
may be AMI, Insyde or others. They may be EFI/UEFI Bios, but they may not use
the same EFI/UEFI ata solution from EDK2.
Last, are you sure the legacy boot of you mentioned also reads 0x600 sectors
one time?
Thanks
Feng
From: David F. [mailto:df7...@gmail.com]
Sent: Saturday, November 16, 2013 01:10
To: edk2-devel@lists.sourceforge.net
Subject: [edk2] Grub error reading sector 0x600 on CD-RW and DVD+RW
Hi,
I've noticed many systems (at least HP, Acer, Asus P67 and Z77 boards, and
users reporting consistent too) when booting a CD-RW or DVD+RW disc using shim
to load grub which then goes to load the kernel ends up with an error reading
sector 0x600 on device fd0. as a test, I modified grub logic to better pick
the device as a test and got it to read error on sector 0x600 on cd0. I also
output the UEFI error code which is 7 (device error). The interesting thing is
you can boot that same kernel file in legacy boot mode (just choosing the
different cd boot option from the device boot selection menu) using isolinux no
problem so nothing wrong with the disc. Also it's always sector 0x600 on all
the systems it fails on. Another interesting fact is if you create a CD-R,
DVD-R or DVD-RW (burned like DVD-R which puts it in that mode) it will boot
fine in UEFI mode.
Any ideas? I would guess it's probably a bug in the UEFI firmware from whoever
is providing HP, Asus and Acer their UEFI BIOS? isn't the firmware supposed to
be based on the EDK?
Anyway, any idea?
TIA!! (that's Thanks in Advance)
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