5/16/2023 0 Comments Carbon copy cloner black fridayIf requested data is present in ARC, it will not be pulled from pool. The ARC is hazardous in that you have this cache for storage. ECC used to be a fairly standard feature on computers, and it was really the introduction of the low cost PC market that did ECC in. Some drama queens have attempted to escalate the non-ECC argument for puzzling reasons. And if your bank said that they "probably wouldn't" lose your money, you'd be happy with that, right? By way of comparison, most RAM errors are mere bit flips and likely to be much less destructive. For example, using an overheating HBA is a known way to encourage random data errors to be sprayed into your pool in a catastrophic and pool-destructive manner. You can do damage to your data in lots of ways. It is unlikely for a ZFS pool to be "corrupt everything" there are theoretically ways for stuck bits or random flips in RAM to corrupt data, but these are only going to corrupt some subset of data. "Probably won't" and "corrupt everything". But it is also true that storing all your data on FFS, EXT3, NTFS, or BTRFS probably won't corrupt everything, yet you've selected ZFS to store your data. Certainly it is true that scrubbing ZFS without ECC RAM probably won't corrupt everything. When building a ZFS system, some reasonable assumptions are that you value your data and you may have quite a bit of it to store. I particularly enjoyed the title of this video "Why Scrubbing ZFS Without ECC RAM Probably Won't Corrupt Everything". The only way available to normal end users to eliminate such errors is to reload the pool from backup. Once bad data is injected into a pool, hopefully it can be deleted if it is within a file, but if it is metadata then there is a good chance that there is no way to delete it, and the error is permanently introduced into the pool. It should be pointed out that the big argument for ECC is that ZFS contains no "fsck" or "chkdsk" ZFS is entirely reliant on the correctness of the code and the ability of the pool to faithfully store and retrieve data. I will need to hear by tomorrow of course. I am curious to hear from others who are using truenas without ECC, who have maybe had catastrophic issues. If I wanted it would be much more expensive and are not keen to spend much at all. It is regularly backup up to truenas and the media machine share. My main machine has important files on there. It is not tied to my livelyhood, mainly my entertainment. So if I lose a data on a truenas, it will be annoying. With a BIOS update can boot headless it seems. VMs will be allocated more memory and cores. So it seems tempting to get some slow cheap memory 64GB - maybe tomorrow as it is black Friday. So I have an MSI B450 tomahawk and a 3600X CPU not being used. Oh and backup weekly to external drives - 4 of them. A few old hard drives in raid Z1 is in it with samba shares. I left XMP turned off so the memory runs cooler and hopefully less errors.Įverything important is regularly backup up to another machine. I have had broken drives, so replaced.Īny memory issues have been due to lack of it, but apparently not due to using non ECC. I passthrough the onboard intel sata controller to ttuenas. I have been using it for a few years It had freenas, then truenas.
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