Why does lvm physical volume have significantly less space than the actual underlying device it contains?
Issue
pvcreatecommand use a lot of space- 3 disk presented to linux server 1) 6.3TB & 2) 5.4TB disk. After pvcreate created on the disk the sizes are now 1) 5.73TB & 2) 4.9TB devices. That is a lot of overhead. Is there a way or an option to pass that reduce the overhead on pvcreate?
fdisk :
Disk /dev/sdb: 5400.9 GB, 5400911437824 bytes
Disk /dev/sdc: 6301.1 GB, 6301063340032 bytes
Disk /dev/sdd: 5400.9 GB, 5400911437824 bytes
pvs:
/dev/sdb volgrp02 lvm2 a-- 4.91t 4.91t
/dev/sdc volgrp02 lvm2 a-- 5.73t 5.73t
/dev/sdd volgrp02 lvm2 a-- 4.91t 4.91t
Environment
- Red Hat Enterprise Linux (RHEL) 6.5
- Logical Volume manager (LVM) 2
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