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Extending LVM Size with Multiple LUNs

Create New LUN with existing iSCSI Target on Synology

We can see there is already one LUN called pve-vmimages mapped to pve-vmimages iSCSI target. Now create pve-vmimages-ext LUN and map it to the same iSCSI target. The result should look like the following:

Synology Disk Manager

Rescan for New LUN on Proxmox VE Hosts

root@pve1:~# iscsiadm --mode session --rescan

root@pve1:~# lvmdiskscan
  /dev/mapper/36d094660267abf0024ff75e573972158 [       4.91 TiB] LVM physical volume
  /dev/mapper/360014050e5db761da222d496ed8dd6d7 [       1.00 TiB]
  /dev/mapper/35000c500a0d6c0ef                 [       1.64 TiB]
  /dev/mapper/35000c500a0d688eb                 [       1.64 TiB]
  /dev/mapper/35000c500a0d68dbf                 [       1.64 TiB]
  /dev/mapper/35000c500a0d6a79b                 [       1.64 TiB]
  /dev/mapper/36001405a660c610d0d43d4ad7d80f6dd [       1.50 TiB] LVM physical volume
  /dev/sdi2                                     [     256.00 MiB]
  /dev/sdi3                                     [     445.75 GiB] LVM physical volume
  4 disks
  2 partitions
  1 LVM physical volume whole disk
  2 LVM physical volumes

root@pve1:~# pvcreate /dev/mapper/360014050e5db761da222d496ed8dd6d7
  Physical volume "/dev/mapper/360014050e5db761da222d496ed8dd6d7" successfully created.

root@pve1:~# lvmdiskscan -l
  WARNING: only considering LVM devices
  /dev/mapper/36d094660267abf0024ff75e573972158 [       4.91 TiB] LVM physical volume
  /dev/mapper/360014050e5db761da222d496ed8dd6d7 [       1.00 TiB] LVM physical volume
  /dev/mapper/36001405a660c610d0d43d4ad7d80f6dd [       1.50 TiB] LVM physical volume
  /dev/sdi3                                     [     445.75 GiB] LVM physical volume
  1 LVM physical volume whole disk
  3 LVM physical volumes

root@pve1:~# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  pve   2  16   0 wz--n- 5.35t     0
  vms   1  38   0 wz--n- 1.50t 62.00g

root@pve1:~# vgextend vms /dev/mapper/360014050e5db761da222d496ed8dd6d7
  Volume group "vms" successfully extended

root@pve1:~# vgs
  VG  #PV #LV #SN Attr   VSize VFree
  pve   2  16   0 wz--n- 5.35t    0
  vms   2  38   0 wz--n- 2.50t 1.06t

References