On 28 February 2014 20:32, Philip Robar <philip.ro...@gmail.com> wrote:
> This is a ZFS issue because ZFS is advertised as being the most resilient > file system currently available; however, a community leader in the FreeNAS > forums (though, as pointed out by Daniel Becker, one without knowledge of > ZFS internals) has argued repeatedly and strongly, and in detail that this > robustness is severely compromised by using ZFS without ECC memory. Further cyberjock is the biggest troll ever, not even the people actually involved with FreeNAS (iX system) knows what to do with him. He does spend an awful amount of time on the freenas forums helping others and as such tolerate him on that basis.. Otherwise, he just someone doing nothing, with a lot of time on his hand and spewing the same stuff over and over simply because he has heard about it. Back to the ECC topic; one core issue to ZFS is that it will specifically write to the pool even when all you are doing is read, in an attempt to correct any data found to have incorrect checksum. So say you have corrupted memory, you read from the disk, zfs believes the data is faulty (after all, the checksum will be incorrect due to faulty RAM) and start to rewrite the data. That is one scenario where ZFS will corrupt an otherwise healthy pool until its too late and all your data is gone. As such, ZFS is indeed more sensitive to bad RAM than other filesystem. Having said that; find me *ONE* official source other than the FreeNAS forum stating that ECC is a minimal requirements (and no a wiki written by cyberjock doesn't count). Solaris never said so, FreeBSD didn't either, nor Sun. Bad RAM however has nothing to do with the occasional bit flip that would be prevented using ECC RAM. The probability of a bit flip is low, very low. Back to the OP, I'm not sure why he felt he had to mentioned being part of SunOS. ZFS was never part of sunos. JY -- --- You received this message because you are subscribed to the Google Groups "zfs-macos" group. To unsubscribe from this group and stop receiving emails from it, send an email to zfs-macos+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.