Re: After install kernel 2.6.17 some /dev/md- appear

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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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