Hi,

I am experiencing problems in creating a physical volume on RAID 1 system.

Here is what I did.

#/usr/sbin/pvcreate /dev/md0

the message reads:
"Device /dev/md0 not found (or ignored by filtering)."

The /dev/md0 has a partition type 8e for linux LVM

Can anyone enlighten me?

Thanks

what distor you are using?

provide some info.

I am using 64-bit REDHAT EL 5.

Below is what I get from the two suggested commands.

# fdisk -l
Disk /dev/sda: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 181930 1461248302+ fd Linux raid autodetect
/dev/sda3 181931 182401 3783307+ 8e Linux LVM

Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes
255 heads, 63 sectors/track, 182401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 181917 1461248271 fd Linux raid autodetect
/dev/sdb2 181918 182401 3887730 8e Linux LVM

Disk /dev/md0: 1496.3 GB, 1496318148608 bytes
2 heads, 4 sectors/track, 365312048 cylinders
Units = cylinders of 8 * 512 = 4096 bytes

Device Boot Start End Blocks Id System
/dev/md0p1 * 1 365312048 1461248190 8e Linux LVM

#cat /proc/mdstat

Personalities : [raid1]
md0 : active raid1 sdb1[1] sda2[0]
1461248192 blocks [2/2] [UU]

unused devices: <none>

take a look this.

http://www.linuxquestions.org/questi...roblem-681460/