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OS6 now works on x86 Legacy WARNING: NO NTGR SUPPORT!
Update: It is now unofficially possible using NTGR images to update legacy hardware to os6.X See Post #3, for directions to install 6.2.1 on x86 Ultra and Pro Models. (ARM NOT SUPPORTED by this OS) ...
mdgm and I have decided that its time to lock this thread. So please do post any new OS6 on Legacy issues on their own threads.
-The use of parity RAM is has nothing to do with the use of next generation file systems. So you are mistaken on that. ECC RAM just makes the RAM more reliable.
(EDIT- I have seen some posts in other forums that claim you need ECC memory with ZFS, and some wondering the same about btrfs. I think these are all overstated. Errors in RAM can corrupt data in all file systems, including ext with software RAID used by the ultra running OS4. And ECC RAM doesn't protect against all memory errors - like RAID it can fail, and it doesn't help at all when memory is corrupted by software bugs. So yes, memory failures can corrupt data. Depending on where/when the memory failure occurs, it can corrupt "good" data already on the disk. For instance, if it happened during a disk scrub on an OS4 system, or if it resulted in writing a bad parity block on an ordinary write. The good news is that RAM (even without ECC) is still extremely reliable.
There is a paper on the subject here: http://research.cs.wisc.edu/adsl/Public ... fast10.pdf that analyzes this potential vulnerability with ZFS quite rigorously. They conclude that "a single bit flip has a small but not negligible chance of causing failures like reading/writing corrupt data...". Additionally they found that "ext2 is also vulnerable to memory corruptions".
In any event, the ultra does not have ECC memory).
-If you use OS4 you would need a factory reset to expand the volume by more than 8 TiB over its lifetime. That limit does not exist with OS6.
(EDIT- I have seen some posts in other forums that claim you need ECC memory with ZFS, and some wondering the same about btrfs. I think these are all overstated. Errors in RAM can corrupt data in all file systems, including ext with software RAID used by the ultra running OS4. And ECC RAM doesn't protect against all memory errors - like RAID it can fail, and it doesn't help at all when memory is corrupted by software bugs. So yes, memory failures can corrupt data. Depending on where/when the memory failure occurs, it can corrupt "good" data already on the disk. For instance, if it happened during a disk scrub on an OS4 system, or if it resulted in writing a bad parity block on an ordinary write. The good news is that RAM (even without ECC) is still extremely reliable.
There is a paper on the subject here: http://research.cs.wisc.edu/adsl/Public ... fast10.pdf that analyzes this potential vulnerability with ZFS quite rigorously. They conclude that "a single bit flip has a small but not negligible chance of causing failures like reading/writing corrupt data...". Additionally they found that "ext2 is also vulnerable to memory corruptions".
In any event, the ultra does not have ECC memory).
-If you use OS4 you would need a factory reset to expand the volume by more than 8 TiB over its lifetime. That limit does not exist with OS6.
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