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VxVM 5.0.1 and Mirror UX

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Frequent Advisor

VxVM 5.0.1 and Mirror UX



So i recently did a fresh install of 11.31 on one of our servers, it is noted that the default it is to use VxVM 5.0.1 and i just toniced some changes on the device files used in LVM.


Before we would use device files like: /dev/dsk/c2t0d0 to create PVs and so on. However, when i was inspecting the already created VG00 i noticed that it showed:

--- Physical volumes ---
PV Name /dev/disk/disk3


So my question is, in order to mirror my boot disk, do i just need to follow the same old documentation and just change the device file used from /dev/dsk/cXtXdX to /dev/disk/diskX...? Or are there other considerations i need to take before doing this?


Anyone care to share some ideas or documentation on this matter?



Honored Contributor [Founder]

Re: VxVM 5.0.1 and Mirror UX

The /dev/disk/disk# vs /dev/dsk/c?t?d? device files are due to the I/O stack on HP-UX 11.31.  


There are multiple white-papers on the new I/O stack available here:



As far as mirroring goes -- Yes, you can substitute the new /dev/disk/disk# device file for the old /dev/dsk/c?t?d? device files.  Other than that, you mirroring procedures are exactly the same.

Trusted Contributor

Re: VxVM 5.0.1 and Mirror UX

You can have vxvm use the agile device files by doing

vxddladm set naming_scheme=osn mode=new

You say you use VxVM 5.01 but you mention lvm.. If your system is using a VXVM boot disk you should mirror using vxvm vxrootmir command in /opt/VRTS/bin

Emil Velez
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