Tag Archives: LVM

Useful Commands for Redhat LVM and increasing Filesystem

Posted on September 20, 2015 by UNIX Admin

– Scan New Hardware: scsi-rescan rescan-scsi-bus.sh –forcerescan – For Physical Volumes: pvdisplay pvscan pvcreate /dev/sdb – For Volume Groups: vgdisplay vgscan vgextend VGNAME PVNAME lvextend -L+50G LVNAME resize2fs LVNAME

Volume Group Status Area (VGSA)

Posted on February 13, 2015 by UNIX Admin

Information about which PPs that are stale and which PVs are missing within a VG. The LVM and SCSI driver reserves somewhere between 7-10% of the available disk space for LVM maps, etc. Ref: http://www.datadisk.co.uk/html_docs/hp/aix_lvm.htm

Volume Group Descriptor Area (VGDA)

Posted on February 13, 2015 by UNIX Admin

Information about all the LVs and PVs within a VG. The first 64K of a PV is reserved for this area – defined in <sys/bootrecord.h>. The VGDA consists of BOOTRECORD: – first 512 bytes. Allows the Read Only System (ROS) … Continue reading →

LVM

Posted on September 20, 2014 by UNIX Admin

LVM :- Logical Volume Manager and it’s a disk Management for Linux/UNIX Systems.