HP Hitachi Dynamic Link Manager Software User Manual
Page 237

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.
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