[linux-lvm] pvcreate fails on a software RAID metadisk

[yves.alloyer]

I experienced something similar with 1.0.1-rc2 (see the [linux-lvm] Root +
Software RAID 1 in partition + LVM + Reiserfs) thread.
>From the code in pv_check_partitioned_dev it seems to me you run into
exactly the same problem.

I did a quick and dirty patch which fixed it for me.
Please be aware: I am new to this list, new to linux LVM...
I know the patch will prevent you from using any partitioned MD device in
LVM. I have no idea of further implications.
------------------------------------------------------------
diff -ru 1.0.1-rc2/tools/lib/lvm_check_partitioned_dev.c
slp-1.0.1-rc2/tools/lib/lvm_check_partitioned_dev.c
--- 1.0.1-rc2/tools/lib/lvm_check_partitioned_dev.c	Mon Aug 20 17:17:56 2001
+++ slp-1.0.1-rc2/tools/lib/lvm_check_partitioned_dev.c	Thu Oct  4 14:47:37
2001
@@ -55,6 +55,8 @@
 	switch (lvm_get_device_type(st_rdev)) {
 	case LVM_DEVICE_TYPE_INVALID:
 	    break;
+	case 2:	/* YAL: MD device on partition. Won't partition it. */
+		break;
 	default:
 	    ret = TRUE;
 	}
------------------------------------------------------------

Please wait until more experienced people comment this patch before using
it.

Yves

> -----Original Message-----
> From: linux-lvm-admin at sistina.com [mailto:linux-lvm-admin at sistina.com]On
> Behalf Of Bill Ellis
> Sent: Thursday, October 04, 2001 6:16 PM
> To: linux-lvm at sistina.com
> Subject: [linux-lvm] pvcreate fails on a software RAID metadisk
>
>
> Hi,
>
> I'm trying to set up lvm 1.01rc4 under a 2.4.10 kernel.  I'm getting an
> error when I try to use pvcreate on a software RAID metadisk.  From the
> '-v' output of pvcreate, it appears that pvcreate thinks my metadisk is
> zero-length.
>
> Here's an example:
>
> root at tik-tok:~# pvcreate /dev/md7
> pvcreate -- ERROR "parameter error" setting up  physical volume "/dev/md7"
>
> root at tik-tok:~# pvcreate -v /dev/md7
> pvcreate -- locking logical volume manager
> pvcreate -- checking physical volume name "/dev/md7"
> pvcreate -- getting physical volume size
> pvcreate -- checking partition type
> pvcreate -- creating new physical volume
> pvcreate -- setting up physical volume for /dev/md7 with 0 sectors
> pvcreate -- ERROR "parameter error" setting up  physical volume "/dev/md7"
>
> root at tik-tok:~# pvcreate --version
> pvcreate: Logical Volume Manager 1.0.1-rc4
> Heinz Mauelshagen, Sistina Software  03/10/2001 (IOP 10)
> root at tik-tok:~# cat /proc/mdstat | grep -A2 md7
> md7 : active raid5 sde7[4] sdd7[3] sdc7[2] sdb7[1] sda7[0]
>       24575488 blocks level 5, 128k chunk, algorithm 0 [5/5] [UUUUU]
>
> root at tik-tok:~# grep md7 /proc/partitions
>    9     7   24575488 md7
>
> Any tips on what might be going on here would be appreciated...
>
> Thanks,
> Bill Ellis
>
>
>
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