6 Replies Latest reply on Jun 19, 2019 11:40 PM by ashishsingh1508

    ESXi 6.7 and 6.5 will not see increased iSCSI volume

    BenjaminHare Lurker

      Working on upgrade planning for move from vSphere 5.5 to 6.7.  Using iSCSI storage (on a Pure Storage array.)  Discovered that ESXi 6.5/7 will not recognize a volume increase until the host is restarted.  Not an ideal workaround.  I don't see this behavior on ESXi 6.0, or 5.5, both which recognize the increase following a rescan of the storage adapter.  Has anyone else run into this?  Found a better workaround?

       

      Steps to reproduce:

       

      1. Install 6.5.0 Update 2 (Build 8294253) or 6.7.0 Update 2 (Build 13006603)
      2. Install iSCSI Adapter and connect to storage
      3. Confirm volume is shown in StorageDevices and the datastore (if applicable) under StorageDatastore
      4. On Pure Storage array, increase size of the volume (say 500 GB to 1 TB)
      5. On ESXi 6.5 host, StorageDevicesRescan
      6. Observe no change in the "Capacity" column

       

      Workaround:

      • Restart host → StorageDevices → observe "Capacity" column now reflects size increase
      • Disconnect NICs used for storage → reconnect NICs →  StorageDevices → observe "Capacity" column now reflects size increase
        • 1. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
          mguidini Enthusiast

          - Increase the size in your Storage array first. (Pure storage?)

          - Right click the datastore in the vSphere client and click Increase capacity...(3-step wizard, done)

          • 2. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
            BenjaminHare Lurker

            Sadly, this doesn't work either.  The wizard doesn't show any available space, so I'm back to restarting the host so it will see that indeed there IS more space on that iSCSI volume.

             

            Just for comparison's sake, I did try your suggestion on ESXi 6.0 and 5.5, and it works: the wizard sees the additional space and let's me expand the datastore.  Looks like my issue is isolated to ESXi 6.5 and 6.7.

             

            [Edited for spelling]

            • 3. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
              a.p. Guru
              Community WarriorsvExpertUser Moderators

              I've seen this too, and to me it looks like a nasty bug, because it's present from all clients (Embedded Host Client, vSphere Web Client, and the HTML5 client).

              What worked for me was to run vmkfstools -V locally on all hosts.


              André

              • 4. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
                BenjaminHare Lurker

                Thanks so much for this suggestion, André, it worked for me but I've got no idea why it should since the -v option only enables verbose output of the vmkfstools command (documentation here.)  Definitely smells like a bug.

                 

                Confirmed your suggestion did work for me, as seen in the following output.  Notice the volume is first shown as 500GB, but after using the -V option it suddenly shows up at 1TB, which is the correct size.  Your workaround solves my problem.  I really appreciate the help.

                 

                [root@KNHESXI29T:~] vmkfstools -Ph /vmfs/volumes/ALPHA/
                VMFS-5.60 (Raw Major Version: 14) file system spanning 1 partitions.
                File system label (if any): ALPHA
                Mode: public Capacity 499.8 GB, 266.6 GB available, file block size 1 MB, max supported file size 62.9 TB
                UUID: 5cf85ed7-65267ec6-b1b9-000c29f8cdb5
                Partitions spanned (on "lvm"):         naa.624a9370967d557ce5c84d1c000113e9:1
                Is Native Snapshot Capable: YES
                [root@KNHESXI29T:~] vmkfstools -V
                [root@KNHESXI29T:~] vmkfstools -Ph /vmfs/volumes/ALPHA/
                VMFS-5.60 (Raw Major Version: 14) file system spanning 1 partitions.
                File system label (if any): ALPHA
                Mode: public Capacity 1023.8 GB, 499.7 GB available, file block size 1 MB, max supported file size 62.9 TB
                UUID: 5cf85ed7-65267ec6-b1b9-000c29f8cdb5
                Partitions spanned (on "lvm"):         naa.624a9370967d557ce5c84d1c000113e9:1
                Is Native Snapshot Capable: YES

                 

                [Edited for formatting.]

                • 5. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
                  a.p. Guru
                  User ModeratorsCommunity WarriorsvExpert

                  You are right, the "-v" (lower case) just produces a verbose output, but the "-V" (upper case) performs a refresh of the VMFS file system.

                  André

                  • 6. Re: ESXi 6.7 and 6.5 will not see increased iSCSI volume
                    ashishsingh1508 Enthusiast
                    vExpert

                    Yes, it was a BUG.

                     

                    However latest version of ESXi 6.5 host has all the fixes