Adding an extra hard disk to the existing vg

[Jestin John Chacko]

Dear,

I need to extend a vg in which one IR volume is present(two hard disks in which raid 1 is configured to form an IR volume)

1. can i add a single hardisk instead of another IR volume as mentioned above to extend my vg?

if its not possible why???

i am using rx 3660 with 11iv23 installed

please help me....

[Matti_Kurkela]

Yes you can.

However, you must be aware that the data on all the LVs you create or extend to the new single disk may be lost if the single disk fails.

If this VG is the vg00 and the single disk fails, your system won't boot normally because it cannot find all the PVs belonging to vg00. This would require booting the system to the LVM maintenance mode to fix things. This is much more complicated and annoying than replacing a RAID1-protected disk.

In summary: possible but not recommended; not a good practice.

MK