Remove shared VMFS from cluster

Shares

Sometime might happen you have to share VMFS across two different clusters for any reason. As it is not recommended to have it shared permanently sooner or later you should remove VMFS from one of the clusters.

In vSphere 4.X is bit complicated because first you have to mask LUN and then you can remove LUN from cluster zoning otherwise if you remove LUN from cluster zoning without masking it ESX server first. ESX will try to reconnect disconnected (unzoned)  LUN which will eventuality cause server completely unresponsive. The only way to bring server back to life would be hard reset.

shared VMFS

shared VMFS

In below example I will mask and remove datastore DATA02

vSphere 4.X
  • Enter host in Maintenance mode – just to be safe here 🙂
  • Map LUN identifier to logical name on ESXi server – esxcfg-scsidevs –vmfs
[[email protected] ~]# esxcfg-scsidevs --vmfs
naa.60a980004176324c4f5d435752724b48:1 /dev/sde1 515ed704-d5b66e37-e0d6-441ea150f0cb DATA01
naa.60a980004176324c4f5d435752724b4a:1 /dev/sdd1 515ed71a-220a9676-b89a-441ea1501443 DATA02
naa.600508b1001c2d3dda79c7df2988a997:5 /dev/sda5 51278577-f3ee919e-7e37-441ea1501444 local
naa.60a980004176324c615d433036515979:1 /dev/sdf1 515ed6ae-7b90e713-87a1-441ea1501443 DATA03
naa.60a980004176324c615d433036515977:1 /dev/sdg1 515ed6a2-461bb276-d196-441ea150f0cb DATA04
[[email protected] ~]#
  • get more details about LUN by executing command: esxcfg-mpath –L | grep naa.<LUN-number>
    • HBA adapter is zoned to
    • LUNID
    • Target number

    As you can see LUN is visible on both adapters, vmhab1 and vmhba2 on L3 (LUNID). We have to mask LUN on both adapters with LunID 3

[[email protected] ~]# esxcfg-mpath -L | grep naa.60a980004176324c4f5d435752724b4a
vmhba2:C0:T3:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 3 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09868fc09667
vmhba2:C0:T8:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 8 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09869fc09667
vmhba1:C0:T4:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 4 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09878fc09667
vmhba1:C0:T9:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 9 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09879fc09667
vmhba2:C0:T2:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 2 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09848fc09667
vmhba2:C0:T7:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 7 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09849fc09667
vmhba1:C0:T3:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 3 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09858fc09667
vmhba1:C0:T8:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 8 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09859fc09667
vmhba2:C0:T1:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 1 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09828fc09667
vmhba2:C0:T6:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 6 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09829fc09667
vmhba1:C0:T2:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 2 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09838fc09667
vmhba1:C0:T7:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 7 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09839fc09667
vmhba1:C0:T1:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 1 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09818fc09667
vmhba1:C0:T6:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba1 0 6 3 NMP active san fc.50014380072857b1:50014380072857b0 fc.500a09808fc09667:500a09819fc09667
vmhba2:C0:T4:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 4 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09888fc09667
vmhba2:C0:T9:L3 state:active naa.60a980004176324c4f5d435752724b4a vmhba2 0 9 3 NMP active san fc.50014380072857b3:50014380072857b2 fc.500a09808fc09667:500a09889fc09667
  • list all claim rules loaded on host: esxcli corestorage claimrule list
[[email protected] ~]# esxcli corestorage claimrule list
Rule Class  Rule   Class    Type       Plugin     Matches
MP          0      runtime  transport  NMP        transport=usb
MP          1      runtime  transport  NMP        transport=sata
MP          2      runtime  transport  NMP        transport=ide
MP          3      runtime  transport  NMP        transport=block
MP          4      runtime  transport  NMP        transport=unknown
MP          101    runtime  vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          101    file     vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          65535  runtime  vendor     NMP        vendor=* model=*
[[email protected] ~]#
  • add claim rules for both adapters: I give rules numbers 192 and 193,  and I mask all LUNs on both adapters with LUNID 3
    • esxcli corestorage claimrule add –rule 192 -t location -A vmhba1 -L 3 -P MASK_PATH
    • esxcli corestorage claimrule add –rule 193 -t location -A vmhba2 -L 3 -P MASK_PATH

    [box type=”warning”] NOTE: In this example, run this command for rules 192 and 193. Your environment may differ based on the number that you provided in above step where you identified LUN details .[/box]

  • load storage rules into system : esxcli corestorage claimrule load
  • list rules on the system: esxcli corestorage claimrule list
[[email protected] ~]# esxcli corestorage claimrule list
Rule Class  Rule   Class    Type       Plugin     Matches
MP          0      runtime  transport  NMP        transport=usb
MP          1      runtime  transport  NMP        transport=sata
MP          2      runtime  transport  NMP        transport=ide
MP          3      runtime  transport  NMP        transport=block
MP          4      runtime  transport  NMP        transport=unknown
MP          101    runtime  vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          101    file     vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          192    runtime  location   MASK_PATH  adapter=vmhba1 channel=* target=* lun=3
MP          192    file     location   MASK_PATH  adapter=vmhba1 channel=* target=* lun=3
MP          193    runtime  location   MASK_PATH  adapter=vmhba2 channel=* target=* lun=3
MP          193    file     location   MASK_PATH  adapter=vmhba2 channel=* target=* lun=3
MP          65535  runtime  vendor     NMP        vendor=* model=*
  • Run this command on all hosts to unclaim the volume in question:
    • esxcli corestorage claiming reclaim –d naa.<LUN-identyfier>
  • rescan both adapters
  • verify if LUN is visible on the system
[[email protected] ~]# esxcli corestorage claiming reclaim -d naa.60a980004176324c4f5d435752724b4a
[[email protected] ~]# esxcfg-rescan vmhba1
[[email protected] ~]# esxcfg-rescan vmhba2
[[email protected] ~]# esxcfg-scsidevs --vmfs
naa.60a980004176324c4f5d435752724b48:1                           /dev/sde1            515ed704-d5b66e37-e0d6-441ea150f0cb  0  DATA01
naa.600508b1001c2d3dda79c7df2988a997:5                           /dev/sda5            51278577-f3ee919e-7e37-441ea1501444  0  local
naa.60a980004176324c615d433036515979:1                           /dev/sdf1            515ed6ae-7b90e713-87a1-441ea1501443  0  DATA03
naa.60a980004176324c615d433036515977:1                           /dev/sdg1            515ed6a2-461bb276-d196-441ea150f0cb  0  DATA04
[[email protected] ~]#

Now, you can remove LUN from ZONING on storage system for particular cluster. When  LUN was removed from ZONING deleter MASK rules from ESX hosts

  • Next step is to remove both claim rules from host:
    • esxcli corestorage claimrule delete –rule 192
    • esxcli corestorage claimrule delete –rule 193
  • Load rules again and list to verify if mask rules are gone all rules again by execute:
    • esxcli corestorage claimrule load
    • esxcli corestorage claimrule list
[[email protected] ~]# esxcli corestorage claimrule delete --rule 192
[[email protected] ~]# esxcli corestorage claimrule delete --rule 193
[[email protected] ~]# esxcli corestorage claimrule load
[[email protected] ~]# esxcli corestorage claimrule list
Rule Class  Rule   Class    Type       Plugin     Matches
MP          0      runtime  transport  NMP        transport=usb
MP          1      runtime  transport  NMP        transport=sata
MP          2      runtime  transport  NMP        transport=ide
MP          3      runtime  transport  NMP        transport=block
MP          4      runtime  transport  NMP        transport=unknown
MP          101    runtime  vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          101    file     vendor     MASK_PATH  vendor=DELL model=Universal Xport
MP          65535  runtime  vendor     NMP        vendor=* model=*
vSphere 5.X

On vSphere 5.X is much more easier, you don’t have to play with command line and claim rules, what you have to do it go to ESXi node and in storage settings right click on datastore and UNMOUNT. Remove LUN from zoning and that’s it.

Unmount VMFS from ESXi 5.X

Unmount VMFS from ESXi 5.X

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Artur Krzywdzinski

Artur is Consulting Architect at Nutanix. He has been using, designing and deploying VMware based solutions since 2005 and Microsoft since 2012. He specialize in designing and implementing private and hybrid cloud solution based on VMware and Microsoft software stacks, datacenter migrations and transformation, disaster avoidance. Artur holds VMware Certified Design Expert certification (VCDX #077).

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