pvdisplay

pvcreate /dev/sdb1

-lvs
vgs

vgextend Volugroup /dev/sb1

lvcreate -L 40G -h lv_rarw volgroup




fdisk -
/dev/xvda1,2,3


https://www.linuxquestions.org/questions/linux-newbie-8/aborted-journal-and-volume-remounted-read-only-812216/


pvs /dev/xvdd