After install kernel 2.6.17 some /dev/md- appear
Paul Howarth
paul at city-fan.org
Sun Jun 25 15:00:02 UTC 2006
On Sun, 2006-06-25 at 16:19 +0200, Ambrogio wrote:
> Hi all,
>
> After updating kernel with yum (now is
> 2.6.17-1.2139_FC5 #1 SMP Fri Jun 23 12:40:11 EDT 2006 x86_64 x86_64
> x86_64 GNU/Linux) I see some strange behaviours.
>
> Some of them I solved, but I see this:
>
> fdisk -l
> Disk /dev/hda: 100.0 GB, 100030242816 bytes
> 255 heads, 63 sectors/track, 12161 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/hda1 1 382 3068383+ 12 Compaq diagnostics
> /dev/hda2 383 1657 10241437+ 7 HPFS/NTFS
> /dev/hda3 2874 12161 74605860 5 Extended
> /dev/hda4 1658 2873 9767520 83 Linux
> /dev/hda5 2874 5364 20008926 83 Linux
> /dev/hda6 * 5365 5402 305203+ 83 Linux
> /dev/hda7 5403 5663 2096451 82 Linux swap / Solaris
> /dev/hda8 5664 5788 1004031 b W95 FAT32
> /dev/hda9 5789 12161 51191091 8e Linux LVM
>
> Partition table entries are not in disk order
>
> Disk /dev/dm-0: 16.1 GB, 16106127360 bytes
> 255 heads, 63 sectors/track, 1958 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Disk /dev/dm-0 doesn't contain a valid partition table
>
> Disk /dev/dm-1: 10.7 GB, 10737418240 bytes
> 255 heads, 63 sectors/track, 1305 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Disk /dev/dm-1 doesn't contain a valid partition table
>
> Disk /dev/dm-2: 11.3 GB, 11366563840 bytes
> 255 heads, 63 sectors/track, 1381 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Disk /dev/dm-2 doesn't contain a valid partition table
>
> What are this /dev/dm that I see?
> I didn't have nothing configured like mirror software or raid.
Does your LVM setup include 3 logical volumes, of around these sizes?
LVM uses the device mapper, just like RAID.
Paul.
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