Using the Promise RAID it is possible to split up an Array into multiple LUNs, which would then be presented to the OS and able to be formatted at will. These do not have to correspond to a Physical segmentation as was the case with the Apple Xserve RAID but instead can be as small or as large as the actual disk array allows. Once split up you can run the LUNs through a fibre channel switch and mount them at will on various servers (although unless the file system supports clustering on only one at a time). If you are using HFS+ for the file system you will then…
-
-
Zone Defined
A zone in Fibre Channel is a segment of a fabric that is composed of selected targets and initiators. Like with a VLAN, only the members of a zone have access to one another. Simply because the switch allows the members to access one another doesn’t mean you can’t still limit access more granularly. You can use storage-based filters, such as LUN Masking, for which devices can access one another based on WWNN information from the initiator port. With Xsan, you can use LUN Masking to limit which of the hosts on your SAN have access to your Xserve RAIDs. UPDATE: LUN Masking was removed as a feature from the Xserve…