Another setting often overlooked is Disk.UseLunReset and/or Disk.UseDeviceReset. ESX defaults to Disk.UseLunReset=1 and Disk.UseDeviceReset=1. This means that when a SCSI bus is reset all SCSI reservations are cleared, not for a specific LUN but for the complete device. This is useful when one uses local storage, but within a VMware environment most companies utilize a SAN and you don’t want to disrupt the entire SAN when it’s not...

Install Open-iSCSI Initiator Type the following command at a shell prompt: sudo apt-get install open-iscsi Open-iSCSI default configuration Default configuration file could be located at /etc/iscsi/iscsid.conf or ~/.iscsid.conf. Open /etc/iscsi/iscsid.conf file: vi /etc/iscsi/iscsid.conf Set node.session.auth.username, node.session.auth.password and other parameter as follows: node.startup = automatic node.session.auth.username =...

The answer lies in the SCSI protocol.  As you know, our SAN is just a really big SCSI drive, for all that the server knows. It doesn’t know that the SAN is off on the network, and that the iSCSI initiator intercepts commands to/from the OS and redirects them over to us. Unfortunately, the is no ‘delete’ command in the SCSI protocol. The server changes the File Table on one of the blocks of storage we’ve set aside for it the...

I found a great article named A “Multivendor Post” to help our mutual iSCSI customers using VMware You really should read it if your using a SAN in combination with ESX...