Overview: The Next Generation Mass Storage Stack (September 2009)

Changes to I/O and Mass Storage Subsystems
This section describes the user-visible changes to the mass storage commands and configuration interfaces.
Changes to Existing Commands
Existing I/O commands are backward compatible; next generation features are controlled by new options to
existing commands or by the mode of the command arguments. The changes are described in detail in the
command manpages, and are summarized in the following sections.
ioscan(1M)
There are several new options and features for the ioscan command in HP-UX 11i v3. If you do not use these
new options, the ioscan output matches that of previous releases.
Note: For readability, examples in this section are reformatted and abbreviated. See The Agile View
and
Appendix B: Using ioscan
for complete sample outputs.
–N Displays the agile view of the I/O configuration. The output is changed as follows:
• Targets are displayed as class tgtpath and hardware type TGT_PATH.
• Each mass storage device has at least two entries in the ioscan output, one for each lunpath
and one for the device itself.
o For each lunpath, ioscan displays the class lunpath, the lunpath hardware path,
and the description LUN path for device, where device is the device class
and instance number, such as disk30.
o For each mass storage device, ioscan displays the LUN hardware path instead of
the legacy hardware path.
• With the existing –n option, instead of displaying legacy DSFs, ioscan displays persistent
DSFs. These are displayed below the device entry, not below each lunpath.
For example:
# ioscan –N –n -f
Class I H/W Path Driver S/W State H/W Type Description
=============================================================
tgtpath 4 0/1/1/0.0x0
estp CLAIMED TGT_PATH parallel_scsi target
lunpath 1 0/1/1/0.0x0.0x0
eslpt CLAIMED LUN_PATH LUN path for disk48
tgtpath 6 0/2/1/0.0x500805f300083891
estp CLAIMED TGT_PATH fibre_channel target
lunpath 6 0/2/1/0.0x500805f300083891.0x4011000000000000
eslpt CLAIMED LUN_PATH LUN path for disk49
tgtpath 8 0/4/1/0.0x500805f300083891
estp CLAIMED TGT_PATH fibre_channel target
lunpath 30 0/4/1/0.0x500805f300083891.0x4011000000000000
eslpt CLAIMED LUN_PATH LUN path for disk49
disk 48 64000/0xfa00/0x1
esdisk CLAIMED DEVICE HP 36.4GST336753LC
/dev/disk/disk48 /dev/rdisk/disk48
disk 49 64000/0xfa00/0x3
esdisk CLAIMED DEVICE HP MSA VOLUME
/dev/disk/disk49 /dev/rdisk/disk49
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