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LVM and VxVM
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How can I map CTD to /dev/disk devices?

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James Brand
Frequent Advisor

How can I map CTD to /dev/disk devices?

We just received our first HP-UX 11.31 server.  I'm only familiar with LVM on HP-UX 11.i where disk devices such as /dev/dsk/c0t8d0 were displayed in commands like "strings /etc/lvmtab" and "vgdisplay -v vg00", etc.


These commands now return /dev/disk/disk4_p2 instead, and I'm wondering how to correlate this to the output of ioscan and lssf /dev/dsk/* which shows the /dev/dsk/ctd numbers?


Any help would be appreciated.



Honored Contributor

Re: How can I map CTD to /dev/disk devices?

In 11.31, the ioscan command got a lot of new options.


In this particular case,

ioscan -m dsf

 is probably exactly what you're looking for.


Or if you want to map the new-style hardware paths :

ioscan -m hwpath




Patrick Wallek
Honored Contributor

Re: How can I map CTD to /dev/disk devices?

You should probably read through this white paper:


The Next Generation Mass Storage Stack  HP-UX 11i v3


It should explain a lot of the new concepts that you haven't seen before.

James Brand
Frequent Advisor

Re: How can I map CTD to /dev/disk devices?

Thanks Matti.  Looks like things have changed a bit.


My goal was to see what disks are available before creating as OS recovery image using the 'drd clone' command.


# ioscan -m dsf
Persistent DSF           Legacy DSF(s)
/dev/rdisk/disk3         /dev/rdsk/c0t8d0
/dev/rdisk/disk4         /dev/rdsk/c0t8d1
/dev/rdisk/disk4_p1      /dev/rdsk/c0t8d1s1
/dev/rdisk/disk4_p2      /dev/rdsk/c0t8d1s2
/dev/rdisk/disk4_p3      /dev/rdsk/c0t8d1s3

So I'm assuming c0t8d0 and c0t8d1 are separate disks.  vg00 contains /dev/disk/disk4_p2 and a pvcreate of /dev/rdisk/disk3 ran without complaint.