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Re: [dm-devel] device mapper not finding all devices



On 7/17/2011 3:03 PM, David Cramblett wrote:
Current Software:
Linux 2.6.18-238.12.1.el5 #1 SMP Tue May 31 13:23:01 EDT 2011 i686
i686 i386 GNU/Linux
device-mapper-1.02.55-2.el5

2.6.18 is now 5 years old; it might be time to upgrade.

I did some research and the only info I could find was regarding dmsetup:

#dmsetup status
pdc_eehgddjjp1: 0 976768002 linear
pdc_eehgddjj: 0 976772992 linear
via_cdeadaheebp1: 0 976768002 linear
via_cdeadaheeb: 0 1953546240 striped 2 8:0 8:16 1 AA


Looks like something is wrong with the vg0-lvol0 entry above, but I
can't figure out how to fix it.  There is also another HDD on each of

You only seem to have 4 entries for two dmraid disks ( which is not well supported so you should not be using it unless you need to dual boot with windows ) and a partition on each. It is also quite strange that the pdc array is using a linear mapping. Could it be a degraded mirror?

the via and pdc controllers that are seen by the system, but not
showing up in the "status" list above.  There is also a disk connected
to PATA port "/dev/hda" that is part of the lvol.

What disks are supposed to be LVM physical volumes? The output of pvdisplay may prove useful. An lvchange -ay might also be worthwhile.

The device-mapper device is being created for the lvol:

  /dev/mapper/vg0-lvol0

If it had actually been created, then it should show up in dmsetup status. The system appears to be failing to create it.


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