Create and manage logical volumes in Linux

In Linux, add a hard disk to the Virtual Machine for logical volume creation and management, and view the hard disk status. Run the fdisk-l command: [root @ jerrybj ~] # Fdisk-l Disk/dev/sda: 21.4 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sda1 * 1 13 104391 83 Linux/dev/sda2 14 2610 20860402 + 8e Linux LVM disk/dev/sdb: 34.3 GB, 34359738368 bytes 255 heads, 63 sectors/track, 4177 cylinders Units = cylinders of 16065*512 = 8225280 bytes Disk/d Ev/sdb doesn' t contain a valid partition table where/dev/sdb is newly added and will be used as a logical volume later. Next, add partition: [root @ jerrybj ~] # Fdisk/dev/sdb Command (m for help): n Command action e extended p primary partition (1-4) p Partition number (1-4 ): 1 First cylinder (1-4177, default 1): Using default value 1 Last cylinder or + size or + sizeM or + sizeK (1-4177, default4177 ): using default value 4177 Command (m for help): p Disk/dev/sdb: 34.3 GB, 34359738368 bytes 255 heads, 63 sectors/track, 4177 cylinders Units = cylinders 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System/dev/sdb1 1 4177 33551721 83 Linux Command (m for help): w The partition table has been altered! Calling ioctl () to re-read partition table. Syncing disks. Now I divide the linux type into the LinuxLVM type. [Root @ jerrybj ~] # Fdisk/dev/sdb Command (m for help): t Hex code (type L to list codes): L... Hex code (type L to list codes): 8e Changed system type of partition 1 to 8e (Linux LVM) Command (m for help ): create pv, vg, and lv under w [root @ jerrybj ~] # Pv pvchange pvcreate pvmove pvresize pvscan pvck pvdisplay pvremove pvs pv. sh [root @ jerrybj ~] # Pvcreate/dev/sdb1 Physical volume "/dev/sdb1" successfully created and create vg [root @ jerrybj ~] # Vg kernel vgconvert vgextend kernel vgs kernel vgcreate vgimport vgreduce vgscan vgchange vgdisplay vgimportclone vgremove vgsplit vgck vgexport vgmerge vgrename [root @ jerrybj ~] # Vgcreate datavg/dev/sdb1 Volume group "datavg" successfully created create lv [root @ jerrybj ~] # Lv lvchange lvdisplay lvmchange lvmsadc lvreduce lvresize lvconvert lvextend lvmdiskscan lvmsar lvremove lvs lvcreate lvm lvmdump lvm. static lvrename lvscan [root @ jerrybj ~] # Lvcreate-n lv_data1-L 15g datavg Logical volume "lv_data1" created [root @ jerrybj ~] # Lvcreate-n lv_dsk1-L 4g datavg Logical volume "lv_dsk1" created [root @ jerrybj ~] # Lvcreate-n lv_dsk2-L 4g datavg Logical volume "lv_dsk2" created [root @ jerrybj ~] # Lvcreate-n lv_dsk3-L 4g datavg Logical volume "lv_dsk3" created [root @ jerrybj ~] # Lvcreate-n lv_dsk4-L 4g datavg Logical volume "lv_dsk4" created next format: [root @ jerrybj ~] # Mkfs. ext3/dev/datavg/lv_data1 [root @ jerrybj ~] # Mkfs. ext3/dev/datavg/lv_dsk1 [root @ jerrybj ~] # Mkfs. ext3/dev/datavg/lv_dsk2 [root @ jerrybj ~] # Mkfs. ext3/dev/datavg/lv_dsk3 [root @ jerrybj ~] # Create a directory under mkfs. ext3/dev/datavg/lv_dsk4: [root @ jerrybj ~] # Mount mkdir/u01/dsk1/dsk2/dsk3/dsk4 at startup: [root @ jerrybj ~] # Add the following content to the end of vi/etc/fstab: /dev/datavg/lv_data1/u01 ext3 defaults 0 0/dev/datavg/lv_dsk1/dsk1 ext3 defaults 0 0 0/dev/datavg/lv_dsk2/dsk2 ext3 defaults 0 0/dev/datavg /lv_dsk3/dsk3 ext3 defaults 0 0/dev/datavg/lv_dsk4/dsk4 ext3 defaults 0 0 [root @ jerrybj ~] # Mount/u01 [root @ jerrybj ~] # Mount/dsk1 [root @ jerrybj ~] # Mount/dsk2 [root @ jerrybj ~] # Mount/dsk3 [root @ jerrybj ~] # Mount/dsk4 success!