Secure Path v2.0 for Sun Solaris Installation and Reference Guide

Technical Description 2-5
Compaq Confidential – Need to Know Required
Writer: Cyndi Vaccaro Project: StorageWorks Secure Path Version 2.0 for Sun Solaris Comments:
Part Number: AA-RKYDA-TE File Name: c-ch2 Technical Description.doc Last Saved On: 12/21/99 4:52 PM
Solaris
Disk Services
Secure Path
Devices
Host Bus
Adapters
sd0 sd1 sd2
ldLite0
ldLite1 ldLite2
fcaw1
ldLite
Devices
sda
Devices
LUN 0
LUN 1
LUN 2
HSG80
Controllers
mda0 mda1 mda2 mda3
mda4 mda5
Controller 0
Port 1 Port 2
Controller 1
Port 1 Port 2
RAID
Storage
Subsystem
Solaris
Server
SHR-1602
Hub 0 Hub 1
fcaw0
Key
On-line Path
Failed Path
Figure 2-4. After Path Failover
Application Access
Applications access Secure Path devices by simply accessing the sd devices as
they would normally. Each Secure Path device has a sd device instance
associated with it and a corresponding cXtYdZ device in /dev/dsk and
/dev/rdsk directories.
Secure Path Device State
Each Secure Path device has a status that describes its current condition. The
state of a Secure Path device is determined by the condition of its paths. The
states for a device are as follows:
■ operational
An operational device has at least one physical I/O path open to a LUN on
the storage system.
■ dead
A dead Secure Path device has no open physical I/O paths to the LUN.
This device is out of service.