Rich Pieri wrote: > On Wed, 27 Jul 2022 16:13:31 -0400 > ma...@mohawksoft.com wrote: > > > A stripe over two mirrors is not as reliable as RAID6. If you have 4 > > drives arranged in two mirrors, each mirror can only survive the loss > > of one drive. So, your system, if it loses 2 drives, has a 33.33% > > chance of losing half its data. > > If I cared that much about fault tolerance then I'd be running one > 4-way mirror instead of two 2-way mirrors. As is, if I lose two drives > out of the four before I can replace and resilver one, all I'm really > out is the most recent backups of my daily drivers and the time needed > to restore my backups which are kept on auxiliary storage.
I'm starting to think that an optimal desktop arrangement might be: NVMe SSD with ZFS on root, zpool 1. SATA SSD in a second zpool, used only to receive ZFS from the other disk. The NVMe is fast and relatively expensive, but if it dies, you still have a pretty fast copy from a few hours ago, which has had much less written to it and will thus have a longer lifetime. -dsr- _______________________________________________ Discuss mailing list Discuss@lists.blu.org http://lists.blu.org/mailman/listinfo/discuss
