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VXDMPVSCSI (1M) |
Maintenance Commands |
vxdmpvscsi disable
vxdmpvscsi enable
vxdmpvscsi iopolicy {A/P | A/P-LB}
vxdmpvscsi listsupport
vxdmpvscsi rmarraysupport vid offset length
- addarraysupport
- Adds support for using an array as a vSCSI device with DMP. By default, EMC, HITACHI and IBM arrays are supported as underlying devices.
The required arguments are:
- vid
- The vendor ID (VID) string for the array.
- offset
- The offset location in the inquiry page in hexadecimal.
- length
- The length of the VID string in hexadecimal.
After using this command, run the rmdev and cfgmgr commands to remove and recreate the devices.
The following are examples of using this command:
vxdmpvscsi addarraysupport SHARK 08 04 vxdmpvscsi addarraysupport FUJITSU 08 07
- disable
- Disables DMP for vSCSI devices. Once DMP support has been disabled, MPIO takes control of the devices, and implements multipathing features such as failover and load balancing; DMP acts in pass-through mode.
- enable
- Enables the use of DMP with vSCSI devices (this is the default behavior). Support for additional arrays can be added by using the addarraysupport operation.
- iopolicy
- Sets the I/O policy for vSCSI devices. The following policies may be specified:
- A/P
- Makes the vSCSI devices behave like Active/Passive arrays. All the paths on one Virtual I/O (VIO) server are active, and the paths on the other VIO server acts in standby mode. At any point in time, I/O is allowed on only one path of the active VIO server. Load balancing of I/O on multiple paths at the same time is not supported.
- A/P-LB
- Configures LUN load-balancing for the vSCSI devices, by dividing the LUN paths between two active VIO servers.
- listarraysupport
- Lists the arrays that are supported for use with vSCSI devices. By default, support for EMC, HITACHI and IBM arrays is enabled. Support for other arrays may be enabled by using the addarraysupport operation.
- rmarraysupport
- Removes support for using an array as a vSCSI device with DMP. See addarraysupport for a description of the arguments.
After using this command, run the rmdev and cfgmgr commands to remove and recreate the devices.
Last updated: 1 Aug 2006
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