On Mon, 2007-05-28 at 03:49 +0100, Sam Morris wrote:
> Here's the beginning of a patch for grub-probe itself to make it handle
> RAID/LVM more intelligently. This will work for the most common
> use-cases; the comments describe an idea to make the probing process
> recursive to handle more interesting situations such as LVM-on-RAID.
I assume this isn't complete or working yet.
By the way I don't think that LVM on LVM is actually supported by LVM
itself,
and raid on LVM is an unlikely scenario.
>
> diff --git a/util/grub-probe.c b/util/grub-probe.c
> index 29d0d0a..8e10986 100644
> --- a/util/grub-probe.c
> +++ b/util/grub-probe.c
> @@ -118,8 +118,36 @@ probe (const char *path)
>
> if (print == PRINT_PARTMAP)
> {
> - if (dev->disk->partition == NULL)
> - grub_util_error ("Cannot detect partition map for %s",
> drive_name);
> + if (dev->disk->partition == NULL) {
> + /* If the device does not have a partition map, it may still
> be a
> + RAID or LVM device. */
> + /* What happens for LVM-on-RAID, or RAID-on-LVM, or nested
> LVM?
> + Maybe this should be recursive, e.g.:
> +
> + Where (md0) consists of two devices: a whole disk and a
> pc partition:
> + probe_partmap (md0)
> + probe_partmap (hd0) -> raid
> + probe_partmap (hd1,1) -> raid
> + probe_partmap (hd1) -> pc
> +
> + Where (foo-bar) is an LVM Logical Volume on a RAID array
> on disks using
> + gpt partitions:
> + probe_partmap (foo-bar)
> + probe_partmap (md0) -> lvm
> + probe_partmap (hd0,1)
> + probe_partmap (hd0) -> gpt
> + probe_partmap (hd1,1)
> + probe_partmap (hd1) -> gpt
> + */
> + if (drive_name[0] == 'm' && drive_name[1] == 'd')
> + printf ("pc gpt raid\n");
> + else if (strchr (drive_name, '-') != NULL)
> + printf ("pc gpt lvm\n");
> + else
> + grub_util_error ("Cannot detect partition map for %s",
> drive_name);
> +
> + goto end;
> + }
>
> if (strcmp (dev->disk->partition->partmap->name,
> "amiga_partition_map") == 0)
> printf ("amiga\n");
>
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--
Daniel Reurich
Centurion Computer Technology (2005) Limited.
Ph: 021 797 722
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