Difference between revisions of "Adding a Disk and Extending a Logical Volume"
From Peter Pap's Technowiki
| Line 25: | Line 25: | ||
host0 host1 host2 | host0 host1 host2 | ||
| − | Probe | + | Probe each host adapter |
# echo "- - -" > /sys/class/scsi_host/host0/scan | # echo "- - -" > /sys/class/scsi_host/host0/scan | ||
# echo "- - -" > /sys/class/scsi_host/host1/scan | # echo "- - -" > /sys/class/scsi_host/host1/scan | ||
# echo "- - -" > /sys/class/scsi_host/host2/scan | # echo "- - -" > /sys/class/scsi_host/host2/scan | ||
| − | 3. | + | 3. Check to see if the new device is there |
| + | |||
| + | # pvscan | ||
| + | PV /dev/sdb1 VG data lvm2 [100.00 GiB / 0 free] | ||
| + | PV /dev/sdc1 VG data lvm2 [100.00 GiB / 0 free] | ||
| + | PV /dev/sdd1 VG data lvm2 [100.00 GiB / 100.00 GiB free] | ||
| + | PV /dev/sda3 VG vg1 lvm2 [47.84 GiB / 17.59 GiB free] | ||
| + | Total: 4 [347.83 GiB] / in use: 4 [347.83 GiB] / in no VG: 0 [0 ] | ||
| + | |||
| + | # ls -al /dev/sd* | ||
| + | brw-rw---- 1 root disk 8, 0 Jan 22 01:14 /dev/sda | ||
| + | brw-rw---- 1 root disk 8, 1 Jan 22 01:14 /dev/sda1 | ||
| + | brw-rw---- 1 root disk 8, 2 Jan 22 01:14 /dev/sda2 | ||
| + | brw-rw---- 1 root disk 8, 3 Jan 22 01:14 /dev/sda3 | ||
| + | brw-rw---- 1 root disk 8, 16 Jan 22 01:14 /dev/sdb | ||
| + | brw-rw---- 1 root disk 8, 17 Jan 22 01:14 /dev/sdb1 | ||
| + | brw-rw---- 1 root disk 8, 32 Jan 22 01:14 /dev/sdc | ||
| + | brw-rw---- 1 root disk 8, 33 Jan 22 01:14 /dev/sdc1 | ||
| + | '''brw-rw---- 1 root disk 8, 48 Jan 22 01:14 /dev/sdd''' | ||
Revision as of 03:25, 22 January 2015
So you have a logical volume that has run out of space and you need to add more. Either it's a VM and you've added another disk file or it's a physical server and you've added another disk.
1. Check the current disk devices with the following commands:
# pvscan PV /dev/sdb1 VG data lvm2 [100.00 GiB / 0 free] PV /dev/sdc1 VG data lvm2 [100.00 GiB / 0 free] PV /dev/sda3 VG vg1 lvm2 [47.84 GiB / 17.59 GiB free] Total: 4 [247.83 GiB] / in use: 3 [247.83 GiB] / in no VG: 0 [0 ] # ls -al /dev/sd* brw-rw---- 1 root disk 8, 0 Jan 22 01:14 /dev/sda brw-rw---- 1 root disk 8, 1 Jan 22 01:14 /dev/sda1 brw-rw---- 1 root disk 8, 2 Jan 22 01:14 /dev/sda2 brw-rw---- 1 root disk 8, 3 Jan 22 01:14 /dev/sda3 brw-rw---- 1 root disk 8, 16 Jan 22 01:14 /dev/sdb brw-rw---- 1 root disk 8, 17 Jan 22 01:14 /dev/sdb1 brw-rw---- 1 root disk 8, 32 Jan 22 01:14 /dev/sdc brw-rw---- 1 root disk 8, 33 Jan 22 01:14 /dev/sdc1
2. Scan the scsi bus to find the new disk
List the host SCSI adapters
# ls /sys/class/scsi_host/ host0 host1 host2
Probe each host adapter
# echo "- - -" > /sys/class/scsi_host/host0/scan # echo "- - -" > /sys/class/scsi_host/host1/scan # echo "- - -" > /sys/class/scsi_host/host2/scan
3. Check to see if the new device is there
# pvscan PV /dev/sdb1 VG data lvm2 [100.00 GiB / 0 free] PV /dev/sdc1 VG data lvm2 [100.00 GiB / 0 free] PV /dev/sdd1 VG data lvm2 [100.00 GiB / 100.00 GiB free] PV /dev/sda3 VG vg1 lvm2 [47.84 GiB / 17.59 GiB free] Total: 4 [347.83 GiB] / in use: 4 [347.83 GiB] / in no VG: 0 [0 ]
# ls -al /dev/sd* brw-rw---- 1 root disk 8, 0 Jan 22 01:14 /dev/sda brw-rw---- 1 root disk 8, 1 Jan 22 01:14 /dev/sda1 brw-rw---- 1 root disk 8, 2 Jan 22 01:14 /dev/sda2 brw-rw---- 1 root disk 8, 3 Jan 22 01:14 /dev/sda3 brw-rw---- 1 root disk 8, 16 Jan 22 01:14 /dev/sdb brw-rw---- 1 root disk 8, 17 Jan 22 01:14 /dev/sdb1 brw-rw---- 1 root disk 8, 32 Jan 22 01:14 /dev/sdc brw-rw---- 1 root disk 8, 33 Jan 22 01:14 /dev/sdc1 brw-rw---- 1 root disk 8, 48 Jan 22 01:14 /dev/sdd
