[gentoo-user] pvcreate on a dmraid device

[Dan Johansson]

I'm trying to setup a new Linux-server with an on board RAID-controller 
(Promise PDC20265 FastTrak100 Lite/Ultra100). Now everything goes well until 
I try to do a pvcreate on one of the raid-partitions, this is the output I 
get:
# pvcreate /dev/mapper/pdc_edcfibbf4
  Device /dev/mapper/pdc_edcfibbf4 not found.

But the device-file is there (along with the other partitions).

# ll /dev/mapper/pdc_edcfibbf*
brw---  1 root root 253,  7 Nov  4 18:22 /dev/mapper/pdc_edcfibbf
brw---  1 root root 253,  8 Nov  4 18:22 /dev/mapper/pdc_edcfibbf1
brw---  1 root root 253,  9 Nov  4 18:22 /dev/mapper/pdc_edcfibbf2
brw---  1 root root 253, 10 Nov  4 18:22 /dev/mapper/pdc_edcfibbf3
brw---  1 root root 253, 11 Nov  4 18:22 /dev/mapper/pdc_edcfibbf4

and dmraid shows the raidgroup OK:
# dmraid -s
*** Active Set
name   : pdc_edcfibbf
size   : 160086465
stride : 128
type   : mirror
status : ok
subsets: 0
devs   : 2
spares : 0

Any suggestions on how I can solve this issue and move on with my 
installation.

Regards,
-- 
Dan Johansson, http://www.dmj.nu
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Re: [gentoo-user] pvcreate on a dmraid device

[Richard Fish]

Dan Johansson wrote:

I'm trying to setup a new Linux-server with an on board RAID-controller 
(Promise PDC20265 FastTrak100 Lite/Ultra100). Now everything goes well until 
I try to do a pvcreate on one of the raid-partitions, this is the output I 
get:

# pvcreate /dev/mapper/pdc_edcfibbf4
 Device /dev/mapper/pdc_edcfibbf4 not found.

But the device-file is there (along with the other partitions).

# ll /dev/mapper/pdc_edcfibbf*
brw---  1 root root 253,  7 Nov  4 18:22 /dev/mapper/pdc_edcfibbf
brw---  1 root root 253,  8 Nov  4 18:22 /dev/mapper/pdc_edcfibbf1
brw---  1 root root 253,  9 Nov  4 18:22 /dev/mapper/pdc_edcfibbf2
brw---  1 root root 253, 10 Nov  4 18:22 /dev/mapper/pdc_edcfibbf3
brw---  1 root root 253, 11 Nov  4 18:22 /dev/mapper/pdc_edcfibbf4
 



I suspect the devices are being filtered.  Take a look at 
/etc/lvm/lvm.conf, and try running pvcreate with -vv to see how it is 
probing the devices.  You might need to add a 'filter = [ a/pdc_*/ ]' 
option to lvm.conf.


-Richard

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