Filter
Top Products
7Contents
Taking a disk offline ..........................................................................................118
Renaming a disk .................................................................................................119
Reserving disks ..................................................................................................119
Displaying disk information ............................................................................120
Displaying disk information with vxdiskadm .......................................121
Controlling Powerfail Timeout ........................................................................122
Setting the PFTO values ............................................................................122
Displaying the PFTO values .....................................................................122
Enabling or disabling PFTO ......................................................................123
Chapter 3 Administering dynamic multipathing (DMP)
How DMP works .................................................................................................125
How DMP monitors I/O on paths ............................................................128
Load balancing ............................................................................................129
DMP coexistence with HP-UX native multipathing .............................130
DMP in a clustered environment .............................................................132
Disabling and enabling multipathing for specific devices ..........................133
Disabling multipathing and making devices invisible to VxVM ........133
Enabling multipathing and making devices visible to VxVM .............134
Enabling and disabling I/O for controllers and storage processors ..........136
Displaying DMP database information ..........................................................137
Displaying the paths to a disk ..........................................................................137
Administering DMP using vxdmpadm ...........................................................139
Retrieving information about a DMP node ............................................139
Displaying the members of a LUN group ...............................................140
Displaying paths controlled by a DMP node, controller or array port 140
Displaying information about controllers .............................................141
Displaying information about enclosures ..............................................142
Displaying information about array ports .............................................142
Displaying information about TPD-controlled devices .......................143
Gathering and displaying I/O statistics ..................................................144
Setting the attributes of the paths to an enclosure ..............................146
Displaying the I/O policy ..........................................................................147
Specifying the I/O policy ..........................................................................147
Disabling I/O for paths, controllers or array ports ...............................153
Enabling I/O for paths, controllers or array ports ................................154
Upgrading disk controller firmware .......................................................154
Renaming an enclosure .............................................................................155
Configuring the response to I/O failures ................................................156
Configuring the I/O throttling mechanism ............................................157
Displaying recoveryoption values ...........................................................159
Configuring DMP path restoration policies ...........................................160
Stopping the DMP path restoration thread ...........................................161