Owner's manual

Accusys A12R/U-FS&SS / A16R/U-FS&SS / A24R/U-FS&SS
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Step 8. Host Configuration
Windows Multi-Path Solution: PathGuard
PathGuard is the bundled multi-path IO solution for Windows platforms,
and it is based on Microsoft Multipath I/O (MPIO) framework. PathGuard
consists of MPIO drivers and a web-based path manager GUI that allows
you to manage MPIO configurations for multiple host computers.
The MPIO drivers include standard drivers from Microsoft and DSM
(Device Specific Module) provided by the RAID system supplier.
The following steps are required for enabling PathGuard MPIO:
1. Complete the hardware and software setup at RAID systems.
2. Install the PathGuard package to the host computer. Register the
vendor name and model name of your RAID system to the PathGuard
(optional).
3. Install the PathGuard MPIO driver.
4. Reboot the host computer.
5. Launch PathGuard GUI to set multi-path policies.
Windows MPIO framework requires rebooting the host computer when
enabling the MPIO driver on the host computer, such that the regular disk
device drivers will be replaced by the MPIO disk drivers.
Windows can properly detect multi-path disks only during MPIO driver
installation, so reconfiguration (like adding/removing paths or LUNs)
requires you to reinstall the PathGuard MPIO driver and reboot the host
computer.
You might need also to manually rescan the physical drives (use
Computer Management > Storage > Disk Management) When multi-path
disks are not properly detected.