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Mass storage devices overview

Managing multipath I/O environments

In a multipath I/O environment, there are multiple paths to any single hard disk. If your computer has multipath capability, use the sdipath(1M) command to manage multipath I/O. The sdipath command provides the ability to list paths including status and performance information, and provides operations for controlling which paths are active so you can tune your system for better performance or higher availability. You can also repair paths that have failed.

Managing ghost names in multipath I/O environments

In a multipath I/O environment, the name for a disk device is determined by the first path discovered to the disk. Ghost names are provided to avoid the naming conflicts encountered when controllers fail in a multipath I/O environment--the operating system continues to use the original device name even when a device is no longer accessible (or has a different first path). You can run sdighost(1M) to change all ghost name references to be real names.


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