I installed lilo-22.2 and moved my /boot from /dev/sda1 to my root FS
which is on LVM /dev/vg0/root. When running lilo I get the message
Fatal: This version of LVM does not support boot LVs
I checked the source code and found in geometry.c
#define DIFF 255
lbmA.lv_dev = lbmB.lv_dev = device;
lbmA.lv_block = 0;
lbmB.lv_block = DIFF;
lvm_bmap(&lbmA);
lvm_bmap(&lbmB);
if (lbmB.lv_block - lbmA.lv_block != DIFF)
die("This version of LVM does not support boot LVs");
which is from Andreas' LILO patch. lilo checks wether the logical
blocks 0 and 255 are also 255 apart from each other on the physical
device (assuming the device is the same).
This clearly works only on non-striped and contigous LVs (which is why
it doesn't work for me since /dev/vg0/root is striped).
I suppose this is intended, but why? Would it be so difficult to let
the lilo loader load blocks from different devices and blocks which
are not in ascending order? The 5-byte structure describing the
blocks to load contains the device: (from lilo/README):
sector [1..63] plus 2 high bits of Cylinder
cylinder [0..1023] low eight bits in this byte
device [0..3] for floppies, [0x80..0x8F] for hard disks
head [0..254] no, the max is 254, not 255
count [1...] number of sectors to transfer
So, why not support booting from striped and non-contiguos LVs?
urs
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