Le 19/07/2017 à 20:54, Felix Miata a écrit :
On an old PATA disk, as you call IDE or hda, the partitioning scheme is very likely the cause of the failure to install to sda, as such schemes can more frequently than we'd like provide insufficient room on the boot track to fit Grub2's bloated loader code. Among such schemes, the one producing the largest boot track space via 255 head and 63 sector "cylinders", a bit over 30kb, is not always adequate. 240/63, another very common configuration, mostly used by laptops and Compaq desktops, obviously provides even less.
IME, 31 KiB is still enough to contain a core image when not needing costly features such as btrfs, LVM or RAID support.
Anyway, the Debian installer calls grub-install with the --force option so that if embedding in the post-MBR area is not possible, the core image will be stored as a regular file in /boot and accessed using block lists unless the filesystem does not support it. AFAIK, only btrfs is not supported with this setup, and a separate /boot is very unlikely to use btrfs.
