<div dir="ltr"><div><div><div><div><div>Yeah, I should have guessed that you weren't running ECC.<br></div>I don't you should have too many problems.<br></div>You're right, raidz1 is basically raid5.<br><br></div>
Read-only during the scrub is a good idea.<br></div><br></div><div>I think you should be able to edit the mount settings in <span class="">/etc/<em>vfstab</em>.<br><br></span></div><div><span class="">-> Jake<br></span></div>
<div><div><div><div><div><div><div> <br></div></div></div></div></div></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Mar 11, 2014 at 2:42 PM, <span dir="ltr"><<a href="mailto:tclug@freakzilla.com" target="_blank">tclug@freakzilla.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Course I'm not using ECC RAM. This is a home system (:<br>
<br>
The data is... well, be nice if it didn't get corrupted, but if a video file gets a small glitch in it, it's not a huge deal. I can always rerip one disc if I need to. I also figured that's why I have two smaller raidz1 (which is equivalent to raid5, right?) pools - it should be able to fix the occasional checksum error.<br>
<br>
I've not seen any crop up on this setup until that scrub, which was after I copied and erased about 8TB a couple of times. So not super worried.<br>
<br>
I can't really not use the filesystem during a scrub, since a scrub takes over 24 hours. I could restrict it to read-only.<br>
<br>
Hey, that reminds me, for some reason the thing mounts as read-only when I reboot. And since it's not in fstab I don't know where to fix that... anyone?...<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
<br>
On Tue, 11 Mar 2014, Jake Vath wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Now, I am seeing occasional checksum errors. I stress-tested the<br>
heck out of the thing for a week or so (filled up the<br>
filesystem, then deleted most the junk I used for that, etc) and<br>
when I ran a scrub it found 12 of them. I'm assuming that since<br>
I am running multiple redundancies that that's not a huge<br>
problem. Is this correct? Should I cronjob a scrub once a month?<br>
<br>
Are you using ECC RAM?<br>
If you're not, then you'll see some checksumming/parity calculation errors.<br>
Is this a huge problem? I guess it could be when you consider how important<br>
your data is to you.<br>
Your ZPool(s) could get really screwed up if you're getting checksumming<br>
errors.<br>
<br>
A cronjob to scrub the system isn't a bad idea, I guess you'd have to make<br>
sure that nothing is going to try and use the system during the scrubbing<br>
process though.<br>
<br>
-> Jake<br>
<br>
<br>
-> Jake<br>
<br>
<br>
On Tue, Mar 11, 2014 at 2:24 PM, <<a href="mailto:tclug@freakzilla.com" target="_blank">tclug@freakzilla.com</a>> wrote:<br>
This is a follow-up to my ZFS woes from a month or so ago.<br>
<br>
Funny thing. When that machine had 16gigs of RAM + 16gigs of<br>
swap, it was using 15gig of RAM and not touching swap at all,<br>
and ZFS performace was horrible.<br>
<br>
So I threw another 16gigs of RAM in there.<br>
<br>
Now it uses 20gigs of RAM (still not touching swap, obviously)<br>
and ZFS performance is fine.<br>
<br>
Now, I am seeing occasional checksum errors. I stress-tested the<br>
heck out of the thing for a week or so (filled up the<br>
filesystem, then deleted most the junk I used for that, etc) and<br>
when I ran a scrub it found 12 of them. I'm assuming that since<br>
I am running multiple redundancies that that's not a huge<br>
problem. Is this correct? Should I cronjob a scrub once a month?<br>
<br>
I'm pretty gald I didn't need to move away from ZFS...<br>
<br>
--<br>
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<br>
<br>
<br>
</blockquote>
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