vSphere Storage - ESXi 5.1 - Documentation - VMware

vSphere Storage
The default timeout parameter on your host is 140 seconds. You can increase the value of the timeout if, for
example, storage devices connected to your ESXi host take longer than 140 seconds to recover from a connection
loss.
NOTE If you change the timeout value while an APD is in progress, it will not effect the timeout for that APD.
Procedure
1 Browse to the host in the vSphere Web Client navigator.
2 Click the Manage tab, and click Settings.
3 Under System, click Advanced System Settings.
4 Under Advanced System Settings, select the Misc.APDTimeout parameter and click the Edit icon.
5 Change the default value.
You can enter a value between 20 and 99999 seconds.
Check the Connection Status of a Storage Device
Use the esxcli command to verify the connection status of a particular storage device.
In the procedure, --server=server_name specifies the target server. The specified target server prompts you
for a user name and password. Other connection options, such as a configuration file or session file, are
supported. For a list of connection options, see Getting Started with vSphere Command-Line Interfaces.
Prerequisites
Install vCLI or deploy the vSphere Management Assistant (vMA) virtual machine. See Getting Started with
vSphere Command-Line Interfaces. For troubleshooting , run esxcli commands in the ESXi Shell.
Procedure
1 Run the esxcli --server=server_name storage core device list -d=device_ID command.
2 Check the connection status in the Status: field.
n on - Device is connected.
n dead - Device has entered the APD state. The APD timer starts.
n dead timeout - The APD timeout has expired.
n not connected - Device is in the PDL state.
142 VMware, Inc.