Posts Tagged ‘volume’
Sunday, September 20th, 2015
– 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
Tags: file, group, lvextend, LVM, pvdisplay, pvscan, redhat, system, vgdisplay, vgscan, volume
Posted in Linux | No Comments »
Friday, February 13th, 2015
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
Tags: AIX, group, LVM, Status, VGSA, volume
Posted in abbreviations and definitions, AIX | No Comments »
Friday, February 13th, 2015
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) to boot system
- BAD BLK DIRECTORY – found in <sys/bddir.h>
- LVM RECORD – found in <lvmrec.h>
Continue Reading…
Tags: AIX, group, LVM, vgda, volume
Posted in abbreviations and definitions, AIX | No Comments »
Friday, February 13th, 2015
You can find below the meaning of each parameter on Volume Group Characteristics (the output from lsvg vg command):
- Volume Group: Name of Volume Group.
- VG State: active/partial. Partial indicates that some of the Physical Volumes in the Volume Group are not active.
- VG Permission: It indicates if the volume group is read-only or read-write.
- Max LVs: Maximum number of Logical Volumes allowed in Volume Group.
- LVs: Total number of Logical Volumes at present in Volume Group.
- Open LVs: Number of LVs open at present in the Volume Group for any Read Write operation.
- Total PVs: Total number of Physical Volumes present in Volume Group.
- Stale PVs: How many stale Physical Volumes are there in Volume Group. The stale Physical Volumes are those ones on which I/O operations are not possible.
- Active PVs: Total number of Physical Volumes which are active in Volume Group.
- Max PPs per VG: Maximum no. of Physical Partitions which can be there in the Volume Group.
- Max PPs per PV: Maximum number of Physical Partitions which can be there in Physical Volume.
- VG Identifier: The very long string to identify Volume Group.
- PP Size: The size of Physical Partition used in every Physical Volume of Volume Group.
- Total PPs: Total number of Physical Partitions in Volume Group.
- Free PPs: Total number of free Physical Partitions with in Volume Group.
- Used PPs: Total number of Physical Partitions in use in Volume Group.
- Quorum: Whether the quorum is on or not in Volume Group.
- VG Descriptors: Number of Volume Group Descriptor Areas(VGDA) in Volume Group.
- Stale PPs: How many Physical Partitions are stale or unable to perform I/O operations.
- Auto On: Whether the Volume Group will varyon on system startup or not.
- Max PVs: Maximum number of Physical Volumes allowed in this Volume Group.
- Auto Sync: Whether this Volume Group should sync automatically or not.
- BB Policy: Its bad block relocation policy. So, this value here is relocatable, that means we are allowed to relocate bad blocks in this Volume Group if need be.
Continue Reading…
Tags: AIX, characteristics, descriptors, group, lps, pps, quorum, stale, vgda, volume
Posted in AIX, Information Management | No Comments »
Saturday, September 20th, 2014
LVM :- Logical Volume Manager and it’s a disk Management for Linux/UNIX Systems.
Tags: AIX, linux, logical, LVM, Manager, unix, volume
Posted in abbreviations and definitions, AIX, Linux, Solaris | No Comments »
Monday, October 21st, 2013
You can use command ‘lsvgfs’ to list all file systems inside specific volume group like the following example:
# lsvgfs rootvg
/
/usr
/var
/tmp
/home
/opt
/admin
/var/adm/ras/livedump
/oracle_osb
/u01/app/oracle
/u02/oradata
/iso_image
/TestFs
Tags: file, group, list, specific, systems, volume
Posted in AIX | No Comments »