Technical data

IMPORTANT:
For information about Secure Path device path representation and usage, see “Secure Path device path
representation and usage”.
Secure Path device path representation and usage
This section provides information about device path representation, usage, and H P recommendations
for Sec ure P ath devices:
• Device path representation of Secure Path for Active-Active disk arrays
• Differences bet ween Secure Path for Active-Active disk arrays and LVM PVLINKS
• HP recommendations
Device path representation of Secure Path for Active-Active disk arrays
Secure Path for Active-Active disk arrays uses the p hysical paths to an end device. HP-UX sees the
alternate paths as actual device files. You can view and access these paths.
Example:
# autopath display
==================================================================
HPswsp Version : A.3.0F.03F.00F
==================================================================
Auto Discover : OFF
==================================================================
Array Type : EVA-AA
Array WWN : 5000-1FE1-0015-3530
Read Optimize : ON
Path Verification Period : 00:10
==================================================================
Lun WWN : 6005-08B4-0010-735A-0000-5000-0082-0000
Virtual Device File : /hpap/dsk/hpap0
Load Balancing Policy : No Load Balancing
Lun Timeout : Infinite Retry (-1)
==================================================================
Device Path Status
==================================================================
/dev/dsk/c10t0d1 Active
/dev/dsk/c12t0d1 Active
/dev/dsk/c14t0d1 Active
/dev/dsk/c16t0d1 Active
==================================================================
Differences between Secure Path for Active-Active disk arrays and LVM PVLI NKS
This section p rovides information about Secure Path for Active-Active disk arrays with LVM and LVM
PVLINKS:
• Secure Path for Active-Active disk arrays with LVM
• Secure Path for Active-Active disk arrays with LVM PVLINKS
Secure Path for Active-Active disk arrays with LVM
For a device configured under LVM, if the LVM primary p ath fails, then Secure Path fails over to an
alternate path and continues p rocessing the I/O until the primary p ath is restored. When the primary
path is restored, I/O resumes on the L VM primary path.
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