Was setting up a NFS volume in openfiler for a lab and hit this strange error on the ESXi host:
2014-09-25T18:36:53.522Z cpu11:32806)WARNING: NFS: 316: Lost connection to the server 10.1.1.51 mount point /mnt/data01/vol01/Openfiler01/, mounted as 05730b90-cf23e830-0000-000000000000 ("Openfiler01") 2014-09-25T18:36:54.524Z cpu10:216948)WARNING: NFS: 2144: Failed to get attributes (I/O error) 2014-09-25T18:36:54.524Z cpu10:216948)NFS: 2207: Failed to get object 36 5730b90 cf23e830 70001 8000080 0 dc16020f c9496472 871a149a 2fb062cb 0 0 0 :I/O error On the ESXi host, i was able to mount the volume successfully and everytime i tried accessing files on the volume, it would go inactive and I had to remove and mount the nfs volume again....
Caution: The following steps will cause data loss.
Two ways to completely delete a VSAN datastore:
I. Move the hosts outside the cluster and delete the cluster
Remove all the disk groups configured on the host Put the host into maintenance mode. Move the host outside the cluster Delete the cluster II. Through esxcli
Remove all the disk groups configured on the host Open an SSH session to each of the esxi hosts that are part of the vsan cluster Run the command, “esxcli vsan cluster leave”
Worked on this issue recently where, after upgrading to ESXi 5.5, a rescan on a software ISCSI initiator was taking a long time to complete. About 10 minutes.
There were only two LUN’s presented to the software ISCSI initiator
The software ISCSI initiator was configured to discover LUN’s from four targets.
The vmkernel.log and hostd.log did not show any errors or relevant messages for the ISCSI initiator.
The software ISCSI daemon logs into the following file: /var/log/syslog....
So, what the heck are Active/Active and Active/Passive Storage Arrays?
And what is the difference between them?
Active/Active:
In an active/active storage system, there are multiple paths to a LUN. All of these paths are active simultaneously. However, a preferred path policy is used. The failover occurs when a NO_CONNECT is received.
Active/Passive:
In an active/passive storage system, there is only one active path to a LUN. All of the other paths are not active and are in standby mode with respect to that LUN....