Why do I lose a large amount of space when using LVM?
Issue
- Disks appear to lose a large amount of disk space when using LVM.
- With 17.5 TB disk, LVM only shows 16.3 TB
# fdisk -l /dev/sdb
Disk /dev/sdb: 17967.7 GB, 17967781773312 bytes
255 heads, 63 sectors/track, 2184458 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
# pvdisplay /dev/sdb
--- Physical volume ---
PV Name /dev/sdb
VG Name datavg01
PV Size 16.34 TB / not usable 4.00 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 4283852
Free PE 786
Allocated PE 4283066
PV UUID eHQF4F-yR3f-8FpR-P263-ZoJ5-W8j1-AYMRTg
- I created partition of 404GB, but f.s (no LVM) is only 365GB. What occupoes the extra 40GB?
Environment
Red Hat Enterprise Linux
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
