HP-UX 11i v3 Persistent DSF Migration Guide

/dev/[r]disk/diskx[_py]
Where
x is the device instance
y is the partition number
Example:
/dev/disk/disk2, /dev/rdisk/disk5_p2
The persistent DSF is associated with a LUN, not with a path to a LUN. A LUN has a virtualized hardware path
known as the LUN hardware path. Each physical path to the LUN is a lunpath hardware path, which is the
agile equivalent of the legacy hardware path. It is important to understand that there is no path related
information encoded within a persistent DSF.
For more information on the agile naming model, see the HP-UX 11i v3 Mass Storage Device Naming white
paper available at
http://www.hp.com/go/hpux-core-docs. Click on HP-UX 11i v3 and scroll down to the White papers
section.
Agile and Legacy Views in ioscan
By default in HP-UX 11i v3 ioscan shows the legacy view. This view is compatible with previous releases of
HP-UX. To enable the agile view in output of the ioscan command you must use the new –N option.
Mapping Commands
In HP-UX 11i v3, the ioscan command offers two new options to map configuration information from the
legacy view to agile view:
-m dsf [dsf_name]
To map legacy DSFs to persistent DSFs
-m hwpath [-H hw_path]
To map legacy hardware paths to lunpath hardware paths
and LUN hardware paths
Legacy DSF to Persistent DSF mapping:
The ioscan –m dsf [dsf_name] command shows the mapping between character legacy DSFs
and character persistent DSFs if no dsf_name is specified. As a rule, the block DSFs are mapped
similarly. If a dsf_name is specified, it shows the mapping for this DSF name only.
Sample ioscan -m dsf output:
Persistent DSF Legacy DSF(s)
========================================
/dev/rdisk/disk17 /dev/rdsk/c9t0d0
/dev/rdisk/disk24 /dev/rdsk/c4t0d0
/dev/rdisk/disk37 /dev/rdsk/c5t0d0
/dev/rdsk/c8t0d0
/dev/rdisk/disk38 /dev/rdsk/c5t1d0
/dev/rdsk/c8t1d0
In the example above the persistent DSF /dev/rdisk/disk17 maps to the legacy DSF
/dev/rdsk/c9t0d0. The persistent DSF /dev/rdisk/disk37 maps to the legacy DSFs
/dev/rdsk/c5t0d0 and /dev/rdsk/c8t0d0. This also implies that block persistent DSF
/dev/disk/disk17 (not shown) maps to block legacy DSF /dev/dsk/c9t0d0.
Legacy Hardware Path to Lunpath Hardware Path mapping:
The ioscan –m hwpath [-H hw_path] command shows the mapping between legacy hardware
paths, lunpath hardware paths, and LUN hardware paths. If a hw_path is specified with option -H, it
shows the mapping for that hw_path only.
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