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5.4. ZFS and Array Storage

ZFS also works well with your current storage arrays. Any logical unit number (LUN) presented to ZFS is used like any other disk. These are some considerations when using storage arrays with ZFS:

  • ZFS is not a shared file system. The LUNs presented are exclusive to the ZFS host.

  • ZFS is oblivious to disk failures if hardware RAID is used. The LUN presented will look normal to ZFS, and any disk replacement will be handled at the array level. The array is responsible for rebuilding the LUN.

  • A striped LUN is just a bigger disk. A disk failure in a striped LUN will be a failure of the whole LUN. The failed disk needs to be replaced and the LUN rebuilt before ZFS resilvering can take place.

  • ZFS still needs its own redundancy. Even if the LUN is redundant (mirror or RAID-5), ZFS still needs to be configured in a mirror or a RAID-Z for best results.

  • ZFS is MPxIO safe. In Solaris 10, MPxIO is integrated in the operating system. MPxIO provides a multipathing solution for storage devices accessible through multiple physical paths. See www.sun.com/bigadmin/xperts/sessions/23_fibre/#7.


  

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