Dynamic Root Disk Frequently Asked Questions (766143-001, March 2014)
2-4.
If I am running multiple drd runcmd operations, can I avoid mounting and unmounting the
inactive system image for each runcmd execution?
2-5.
Does the DRD clone operation verify that the target is not in use or part of another VG?
Once the root disk is cloned, is there anything in the operating system that prevents the
non-active target from being reused? How can inactive targets be identified?
2-6.
Can I vgimport the target disk as /dev/vgtmp?
2-7.
Can DRD show whether DRD is configured or not configured?
2-8.
Some processes in DRD, particularly drd clone and drd runcmd, take a significant amount
of time. Can these processes be interrupted?
2-1. Q:
How do I use DRD commands?
A:
In some cases, you simply enter the command. For example, if you enter drd mount,
the command mounts the inactive system image file set. In other cases, you need to use
one or more command options. For example, drd clone always needs the -t option
with the target disk identity.
You can also enter the drd runcmd followed by an SD command. For example,
drd runcmd swlist.
drd runcmd limits the action of swlist to just the inactive system image.
For more information about these commands, see the Dynamic Root Disk
Administration Guide for HP-UX 11i (B11.23) on the Information Library page.
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2-2. Q:
Will I need to reboot while installing DRD?
A:
On HP-UX 11i v3 (11.31) systems, there are no required patches for DRD so installing
DRD will not cause a reboot.
Neither DRD nor its corequisites require a reboot. However, one of DRD's corequisites,
patch PHCO_34195, does have a further corequisite on two other patches,
PHKL_33024 and PHKL_33025, that do require a reboot. Most systems will already
have these two patches installed and will have no need for a reboot.
To determine definitely whether your installation of DRD will require a reboot, preview
the installation and check whether any kernel patches (PHKL_*) are included in the
selection at the end of the analysis phase of the install.
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2-3. Q:
How can I tell if I have chosen a sufficiently large target disk for a DRD clone?
A:
A simple mechanism for determining if you have chosen a sufficiently large disk is to
run a preview of the drd clone command: