Re: [PATCH] Skip Apple ghosts

[Andrey Borzenkov <arvidjaar@gmail.com>]

В Вт, 24/12/2013 в 14:26 +0100, Vladimir 'φ-coder/phcoder' Serbinenko
пишет:
> Hello, all. It was discovered that on macs sometimes firmware defines
> ghost disks with vendor suffix. E.g.
> /ACPI(a0341d0,0)/PCI(2,1f)/UnknownMessaging(12)/EndEntire
> is a normal disks with partitions presented with HD(...) but then
> /ACPI(a0341d0,0)/PCI(2,1f)/UnknownMessaging(12)/MediaVendor(Apple)[0:
> ]/EndEntire
> is a ghost disk. It has as suffix a vendor path with empty vendor data.
> This is a problem because when chainloading on such disks GRUB can't
> find handle of partition as none is defined. I propose to dkip ghosts
> completely. This should be safe as the skip happens only for empty Apple
> vendor suffix and if the parent is already a known disk.
> Did anyone see anything similar?

Yes (on MacBook Pro); 

Here is what I get when EFI-booting from GRUB rescue CD made with single
x86_64-efi target:

/ACPI(a0341d0,0)/PCI(1,1f)/ATAPI(0,0,0)/EndEntire
disk
block
/ACPI(a0341d0,0)/PCI(1,1f)/ATAPI(0,0,0)/MediaVendor(2b0585eb-d8b8-49a9-8b8c-e21b01aef2b7)[0: ]/EndEntire
block
simple FS
/ACPI(a0341d0,0)/PCI(1,1f)/ATAPI(0,0,0)/HD(2,10,5c1,0000000000000000,20,0)/EndEntire
disk
block
/ACPI(a0341d0,0)/PCI(1,1f)/ATAPI(0,0,0)/HD(3,5d1,ca3,0000000000000000,20,0)/EndEntire
simple FS
disk
block
/ACPI(a0341d0,0)/PCI(1,1f)/ATAPI(0,0,0)/HD(4,1274,a2,0000000000000000,20,0)/EndEntire
disk
block

The three HD media paths are for three Apple partitions (and the third
one has simple FS because it does contains HFS+). And I /think/ that the
very first Vendor media path refers to CD-ROM (based on the fact that it
got simple FS protocol). I played a bit with it; when I try to list
filesystem for this media path in EFI shell, it audibly tries to access
CD-ROM but fails. May be it requires Apple ISO9660 extensions, but I do
not know how to create EFI bootable image containing Apple extensions
(mkisofs should support it, but I was lost in arguments. xorriso
apparently does not support Apple extensions).

In your case you have SATA DVD drive, right? And path shown refers to
it?