>> If a memory that can pass diagnostics for 24 hours at a
>> stretch can cause glitches in huge datastreams, then IMO it
>> behooves ZFS to defend itself against them. Buffering disk
>> i/o on machines with no ECC seems like reasonably cheap
>> insurance against a whole class of errors, and could make
>> ZFS usable on PCs that, although they work fine with ext3,
>
>How can a machine with bad memory "work fine with ext3"?

"It appears to work".

A long time ago I bought a new PC; it run Windows, it installed Solaris
(pre-ZFS) but when I tried to build on-net, something would die because of 
a SIGBUS or a SIGSEGV.

When I finally run memtest86 (did require a BIOS which supported a USB 
keyboard properly), I had one broken 512MB dimm and I replaced it.

Similarly, when someone upgraded and started to use ZFS he continuously got
bad checksums; and in the end it turned out the powersupply was broken
(not a "bad brand" but one which was broken, delivering out-spec voltages)

Casper

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