Les Mikesell wrote: > On Thu, Aug 21, 2014 at 6:17 PM, John R Pierce <pierce at hogranch.com> > wrote: > >>>> >Yes, but try a software RAID when you have intermittently bad RAM. >>>> >I've been there. Mirrored disks that were almost, but not quite, >>>> >mirrors. >>> try any file system when you've got flakey ram. data thats not quite >>> what you wanted, oh boy. > > Yes, but if you fix the RAM, fsck the disk, and rewrite the data you > sort of expect it to work again. In this case with the mirrors > randomly mismatching but marked as good, fsck would read the good one > in some spots when checking but later the system would read the bad > one. In hindsight the reason is obvious but it took me a while to see > why the box still crashed every few weeks. > >> which, btw, is why I insist on ECC for servers. and really prefer ZFS >> where each block of each part of a raid is checksummed and timestamped, >> so when scrub finds mismatching blocks, it can know which one is >> correct. > > I thought this was supposed to be ECC with 1-bit correction - and I <snip> But wait, Jim, it's worse than that... does the 380 have *mirrored* memory? I know that the 580 I have does.... mark