On Jan 3, 2013, at 3:00 PM, Vladimir 'φ-coder/phcoder' Serbinenko <phco...@gmail.com> wrote:
> GRUB has no limitation on number on devices other than free memory to > hold structures and 2^32 for IDs. If there is any other limit it's a bug > and please file a bug report with the images in question (no need to > install, just use grub-fstest) However BIOS limits the number of disks > that can be accessed. Theoretically there could be up to 128 (or 256 if > you use floppy numbers as well) accessible through BIOS. The convention > is to use only 16 possible IDs for HDD (0x80-0x8f). In practice many > BIOSes are limited to less (8 is usual limit). I'm totally unclear on how to use grub-fstest. Should ls at grub rescue report all attached devices? With single disk btrfs only (no md RAID), at a grub command prompt, ls reports (hd0) (hd0,msdos1) (hd1) (hd2) (hd3) Yet there are 11 devices attached. This is VirtualBox, so this very well may be a vbox limitation. I haven't tried it with KVM's SEABIOS yet. With md RAID only (no Btrfs), ls reports: (md/root) (hd0) (hd0,msdos1) (hd1) (hd1,msdos1) (hd2) (hd1,msdos2) Chris Murphy _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel