Les Mikesell wrote:
> On Thu, Aug 21, 2014 at 6:17 PM, John R Pierce <pierce@xxxxxxxxxxxx>
> 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
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