PV, VG, LV volume management and XFS format

1. PV command

PVCREATE/DEV/SDB1/DEV/SDC1/DEV/SDD1 can take multiple physical partitions and create physical volumes

PVS Lists all physical volumes

Pvscan Scan All physical volumes

Pvdisplay View all physical volume details

2. VG Command

Vgcreate VG1/DEV/SDB1/DEV/SDC1/DEV/SDD1 can take multiple partitions that are represented as physical volumes, set up a volume group

VGS List all volume groups

Vgscan Scan All volume groups

Vgdisplay View All Volume group details

3. LV command

Lvcreate-l 1024m-n lv1 vg1 a 1024M zone from the VG1 to create a logical volume LV1

Lvcreate-l 29.88t-n lv1 Vgmain

Lvs

Lvscan

Lvdisplay

LV1 will appear in/dev/vgmain.

4, MOUNT, MKFS

MOUNT/DEV/VGMAIN/LV1/MNT Mount

Mkfs.ext3/dev/vgmain/lv1

In the Ext3 file system

Block size maximum file Max file system

1KB 16G 2T

2KB 256G 8T

4KB 2T 16T

8KB 16T 32T

Therefore, the above format will be an error. The system default fast size is 4KB, if the maximum system file size has been exceeded. Therefore, you need to modify the block size. or divided into multiple partitions (no more than 16T).

# Mkfs.ext3-b 8192/dev/vgmain/lv1 (Mount when 8192 did not succeed)

5. XFS (Installed on rhel6)

Yum Install Kmod-xfs Xfsprogs
Modprobe XFS//Loading XFS file system module
Lsmod |grep XFS//See if XFS modules are loaded

Format and Mount with XFS
—————————————————————————————
Mkfs.xfs/dev/vg1/lv1
Mount-t Xfs/dev/vg1/lv1/lvdisk

Add to Fstab let system start auto mount
—————————————————————————————————————-

Vi/etc/fstab//Open Fstab
Uuid=c3749d2d-08b5-45a3-9aa4-312b6161d471/data XFS Defaults 1 2//Add mount information Specify file system XFS (UUID obtained by BLKID/DEV/SDB1 command)

6. Bare Equipment (Udev)

No formatting XFS is also available, and can be exported directly using the UDEV device

Vim/etc/udev/rules.d/60-raw.rules

Join:

action== "Add", kernel== "Lv1", run+= "/bin/raw/dev/raw/raw1%N"

Vim/etc/rc.local

Join:

Chown Root:root:/DEV/RAW/RAW1

chmod 777/DEV/RAW/RAW1

VIM/

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PV, VG, LV volume management and XFS format