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Note - Due to the file system-agnostic behavior of Availability Suite 4.0, Solaris disks formatted for the UFS files system (and others) are restricted to being mounted on the hardware platform on which they were originally formatted. In other words, a UFS disk formatted on a SPARC-based platform cannot be used for UFS on an x86-based platform, nor can a disk formatted on an x86 platform be used on a SPARC-based platform. This is because the SPARC and x86 UFS formats are different. SPARC uses big-endian bit coding, whereas x86 and x64 platforms use little-endian bit coding.
This issue is not pertinent to ZFS file systems. For ZFS, a storage pool can be replicated between big- and little-endian architectures and ZFS will operate correctly. ZFS uses an adaptive endianess concept, where all ZFS metadata is written in the current native endianess and is marked appropriately. On being read, the endianess is determined and adjusted as needed. Although a ZFS file system is endian neutral, it does not offer the guarantee that an application writing or reading the contents of files within a ZFS file system is endian neutral. |
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