Migrating from HP StorageWorks for Active-Active Disk Arrays to Native Multipathing in HP-UX 11i v3 (February 2007)

Where: <SecurePathAlias> is the alias provided by Secure Path for Active-Active disk arrays,
and <NewStyleDSF> is the new DSF introduced i n HP–UX 11i v3 to represent each LUN.
• Update the /etc/fstab with HP–UX 11i v3 disk device special file by replacing the virtual
aliases provided by Secure Path for Active-Active disk arrays.
Migration process
The migration process is automatically executed when the OS upgrades to HP-UX 11i v3. It requires no
user inter ven
tion.
The mapping between the Secure Path virtual aliases and the new persistent DSFs are generated only af ter
the successful upgrade of the OS. The migration process updates all the Secure Path virtual aliases with the
new p ersistent DSFs. If the virtual aliases provided by Secure Path (Active-Active disk arrays) are used in
the /etc/fstab file, the entries are automatically replaced with the corresponding new persistent DSF.
Systems connected with HP StorageWorks Active-Active disk a rrays
HP-UX 11i v3 supports the HP StorageWorks Active-Active disk arrays. The Secure Path virtual aliases
(of the format /hpap/dsk/hpapX) for Active-Active disk arrays provided for the Secure Path managed
LUNs are not available after the OS upgrades to HP-UX 11i v3. Instead, the Active-Active disk arrays
uses the new persistent DSFs that are introduce d with HP-UX 11i v3. The mapping between the Secure
Path virtual a liases and the new persistent DSFs are stored in the /opt/HPswsp_migration/Secure
PathVDsf_To_NativeMultipathingDsf.txt file. Use this fi le as a reference for any applications
that was using virtual aliases in HP–UX 11i v2.
Systems connected with HP StorageWorks Active-Passive disk arrays
HP-UX 11i
v3 does not support HP StorageWorks Active-Passive disk arrays, which includes EVA3000,
EVA5000
, EMA12000, a nd EMA16000. If you are using the EVA (Enterprise Virtua l Array) Active-Passive
disk arr
ays, you must upgrade the firmware to an appropriate Active-Active disk array version.
NOTE:
• Use the Secure Path migration kit provided with HP-UX 11i v3 for migrating the EVA Active-P assive
disk ar
ray devices to Active-Active disk array devices.
• For EMA (Enterprise M odular Array) Active-Passive disk arrays, tra nsfer the data to other disk arrays
that are supported in HP–UX 11i v3, before upgrading the OS to HP-UX 11i v3.
HP-UX 11i v3 does not support Active-Passive disk arrays. When the OS upgrades to HP–UX 11i v3, Secure
Path for Active-Passiv e disk arra ys are uninstalled and a message is displayed: Secure Path for
Active-Passive disk arrays are uninstalled. The information about the device special fi les
(of the format cXtYdZ) assigned by Secure Path for Active-Passive disk arrays to the Active-Passive LUNs
is stored in the /opt/HPswsp_migration/SecPath_AP_CTD_to_LunWWN.txt file.
Use the scsimgr system utility to get more information about all the LUNs present in HP–UX 11i v3.
For example, use scsimgr -p get_attr -a wwid -a device_file current all_lun
command to get information on mapping between WWN of the LUNs and new device special file
assigned to them.
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Migration