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HP Hitachi Dynamic Link Manager Software User Manual

Page 237

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3. Creating an HDLM Environment

215

actually created.

Only one HDLM device is created for one LU

#

. However, for one LU, VxVM

recognizes the same number of HDLM devices as the number of physical paths.
#

For logical device files of HDLM devices, the number of such files to be

created is the same as the number of slices for one LU.

Figure 3-22: Devices Recognized by VxVM after Removal of Devices from VxVM

shows the devices that are recognized by VxVM after removal of the non-HDLM

devices from VxVM.

Figure 3-22: Devices Recognized by VxVM after Removal of Devices from

VxVM

Only HDLM devices (c5t0d0) that are actually created are recognized. In this case,

HDLM functions, such as load balancing and failover, work normally.
Note

After VxVM is installed, if the

vxdiskadm

utility has not been used to suppress

a device or DMP from VxVM, the settings files such as

/etc/vx/

vxvm.exclude

may be absent. If these settings files do not exist, you may be

unable to suppress devices correctly.