After partitioning the logical volume, we are just for dynamic expansion. We just encountered such a problem today, so let’s write about the operation process.
After adding the hard disk, use the following command to directly display and read without shutting down
echo "- - -" > /sys/class/scsi_host/host0/scan
echo "- - -" > /sys/class/scsi_host/host1/scan
echo "- - -" > /sys/class/scsi_host/host2/scan
1. First add the hard disk, then format, remember to select dynamic logical volume 8e, the details are as follows
2. Format the hard disk, CentOS7 is generally xfs, use the following command mkfs.xfs /dev/sdb1
3. Create pv
pvcreate /dev/sdb1
There will be an alarm here, just confirm with Y
Then use pvdisplay to see the new pv
4. Extend vg. Here we want to expand to the above centos. The vg command is as follows
vgextend centos /dev/sdb1
Confirm that the capacity of vg has been up
Two different PVs in the same vg
5. Expand the corresponding lv, which is centos because we want to expand the home
Add sdb1 to the home directory
lvextend /dev/mapper/centos-home /dev/sdb1
6. Reactivate the partition table
Because we are xfs here, the command is
xfs_growfs /dev/mapper/centos-home
If it is not xfs, use the following command
resize2fs /dev/mapper/centos-home
If the following error is reported, the command is wrong, just find out how to reactivate the corresponding format
