HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 227)

Devices to Be Removed from VxVM
The following figure shows devices that are recognized by VxVM before they
are disabled.
Figure 3-23 Devices That Are Recognized by VxVM before They Are
Removed from VxVM
You must remove the following non-HDLM devices that are recognized by
VxVM. If the following devices are being managed by VxVM, HDLM functions,
such as load balancing and failover, will not work normally.
• sd or ssd devices (c3t0d0, c4t1d0)
When an HDLM device is created, the logical device file of the
corresponding sd or ssd device will be deleted. However, VxVM recognizes
the sd or ssd device as still existing even if the logical device file was
deleted.
• HDLM devices assumed by VxVM (c6t1d0)
Devices that VxVM virtually recognizes as HDLM devices. These devices
are not 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.
Creating an HDLM Environment
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Hitachi Dynamic Link Manager (for Solaris) User Guide