I completely agree. I'm experiencing these issues currently. Largely.
Doing a scrub is just obliterating my pool.
scan: scrub in progress since Mon Mar 31 10:14:52 2014
> 1.83T scanned out of 2.43T at 75.2M/s, 2h17m to go
> 0 repaired, 75.55% done
> NAME STATE READ WRITE CKSUM
> moon ONLINE 0 0 91
> mirror-0 ONLINE 0 0 110
> diskid/DISK-VB92cae47b-31125427p1 ONLINE 0 0 112
> diskid/DISK-VBd1496f13-1a733a17p1 ONLINE 0 0 114
> mirror-1 ONLINE 0 0 72
> diskid/DISK-VB343ad927-b4a3f4f8p1 ONLINE 0 0 77
> diskid/DISK-VB245c2429-c36e13b0p1 ONLINE 0 0 74
> diskid/DISK-VB98bcd93f-cdf5113fp1 ONLINE 0 0 0
> diskid/DISK-VB56c14272-ddacbe50p1 ONLINE 0 0 0
> errors: 43 data errors, use '-v' for a list
I'm using RAM that is definitely non-ECC. They are:
+ OCZ Reaper HPC DDR3 PC3-12800 (ocz3rpr1600lv2g) 3x2GB
+ Corsair Vengeance (cmz12gx3m3a1600c9) 3x4GB
I'm also running ZFS on FreeBSD 10.0 (RELEASE) in VirtualBox on Windows 7
Things seem to be pointing to non-ECC RAM causing checksum errors. It looks
like I'll have to swap out my memory to ECC RAM if I want to continue this
project, otherwise the data is pretty much hosed right now.
On Wednesday, February 26, 2014 8:56:50 PM UTC-5, Philip Robar wrote:
> Please note, I'm not trolling with this message. I worked in Sun's OS/Net
> group and am a huge fan of ZFS.
> The leading members of the FreeNAS community make it
>  (with
> a detailed explanation and links to reports of data loss) that if you use
> ZFS without ECC RAM that there is a very good chance that you will
> eventually experience a total loss of your data without any hope of
> recovery.  (Unless you have literally thousands of dollars to spend on
> that recovery. And even then there's no guarantee of said recovery.) The
> features of ZFS, checksumming and scrubbing, work together to silently
> spread the damage done by cosmic rays and/or bad memory throughout a file
> system and this corruption then spreads to your backups.
> Given this, aren't the various ZFS communities--particularly those that
> are small machine oriented --other than FreeNAS (and even they don't say
> it as strongly enough in their docs), doing users a great disservice by
> implicitly encouraging them to use ZFS w/o ECC RAM or on machines that
> can't use ECC RAM?
> As an indication of how persuaded I've been for the need of ECC RAM, I've
> shut down my personal server and am not going to access that data until
> I've built a new machine with ECC RAM.
>  ECC vs non-ECC RAM and ZFS:
>  cyberjock: "So when you read about how using ZFS is an "all or none"
> I'm not just making this up. I'm really serious as it really does work that
> way. ZFS either works great or doesn't work at all. That really truthfully
> [is] how it works."
>  ZFS-macos, NAS4Free, PC-BSD, ZFS on Linux
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