#0 0x00000000004015f9 in probe_partmap (disk=0x0)
at /home/fz/grub/grub2-1.96+20080724/util/grub-probe.c:87
87 if (disk->partition == NULL)
This is really a good way to get more into this coding and debugging C stuff in
general and especially, into grub2's code.
As far as I could find out now (more with trying it out then reading the code)
grub itself can handle a raid1
with one missing device or an unsynced one.
Here's a patch which print an error on "grub-probe -t partmap /" instead of
segfaulting.
I have to find out why "grub-probe -t fs /" fails with one missing device but
succeeds with an unsynced one.
First I thought I let it continue and just print out a warning, but there's no
grub_util_warn() and probable anyway better
to reject installing grub on a not fully synced raid.
Please comment :)
Index: util/grub-probe.c
===================================================================
--- util/grub-probe.c (Revision 1747)
+++ util/grub-probe.c (Arbeitskopie)
@@ -179,6 +179,8 @@
list = dev->disk->dev->memberlist (dev->disk);
while (list)
{
+ if (! list->disk)
+ grub_util_error ("At least one underlying device for %s is
missing.",dev->disk->name);
probe_partmap (list->disk);
tmp = list->next;
free (list);
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