When creating the partitions, I thought it wouldn't let me do more then 16 partitions. I was delighted to know that I could go beyond this 16 partition limitation. I guess maybe with new disks this is not a problem?? Don't know why.
Go this error message when I was in the process of upgrading my hard disk.
#sudo pvcreate /dev/sdc16
Device /dev/sdc16 not found (or ignored by filtering).
I reran the command with the "-vvv" option. It failed because of the following error message
/dev/sdc16: Skipping: Unrecognised LVM device type 259
After much web searching I found that this type is known as blkext
So I added the following line to lvm.conf
types = ['blkext', 50]
After doing this, I can now add all the remaining 40+ partitions to LVM.
This setup is for my mythtv production box. I use the same PC as a backend and frontend. Its not advisable I think but I have to do it this way. I use a Logical volume to store recordings. I found that my performance is greatly improved if the physical partitions are small. My thought is that this reduces seek time. I saw improvements after doing this when my PC is taping 2 HD shows and I'm watching a HD show at the same time. Maybe my theory may be wrong, but this works for me.
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