> "two is one and one is none" I almost had a disaster because of this last year... My NVME nas (an Asustor Flashstor 12 <https://www.amazon.com/dp/B0BZCMV1QD>) had a BTRFS corruption issue after a hard poweroff and wouldn't mount read/write. I ended up figuring out it wasn't necessarily because of BTRFS, but the NVME drives I'm using, Silicon Power UD90 4TB (see more about this at the end), lie about sync'd data actually being written to disk, which can cause corruption issues on a variety of fileystems. Since I was able to mount the array read only, I copied everything off on to spinning disks that were part of my old nas and rebuilt the NAS, this time explicitly turning off write cache on boot so that this doesn't happen again.
Then I went and bought a Terramaster F6-424 <https://www.amazon.com/dp/B0DB2MGPZZ>, filled it with the 8TB drives that I've had on the shelf for the last couple years that were part of my old nas, and now sync everything from the NVME nas to the HDD nas. Now I have two copies of everything... For super important data (i.e. important document archives and whatnot) I also sync an encrypted copy off to an online service that also keeps read-only daily backups. I know my setup isn't something everyone can do/afford but yeah you should at least have two copies of your data, but even better to follow the 3-2-1 rule <https://www.veeam.com/blog/321-backup-rule.html> like the setup I have. > data on "consumer grade" external USB flash drives should, generally, be > copied to a new drive about every 3 years if you want to be extra safe. Regular USB sticks, sure, but if you get into the higher end drives like anything from Sabrent (such as the Rocket Nano <https://www.amazon.com/dp/B0BN4MQPF9> or Rocket XTRM <https://www.amazon.com/dp/B0F7P6DZGR>), the Sandisk Extreme Portable <https://www.amazon.com/dp/B08HN37XC1> or the Sandisk Professional PRO-G40 <https://www.amazon.com/dp/B0BW6715SV>, the OWC Express 1M2 Portable <https://www.amazon.com/dp/B0CPRHVLFQ>, etc., they're going to be just as reliable as NVME drives from reputable manufacturers, which have an extremely low failure rate compared to spinning disk drives, especially those horrid SMR drives. In a lot of cases they're just NVME drives in an external enclosure anyway; for instance the only one I listed above that isn't just an NVME with a controller in a case is the Rocket Nano, but even that is the same as the rest of their NVME drives just with a direct USB controller instead of an NVME controller with a translation USB controller. P.S. I wouldn't necessarily recommend the Silicon Power UD90 NVME drives; the only reason why I got them is, because of the bandwidth each disk gets in the Asustor Flashstor 12 (basically a PCIe 3x1 interface), it's basically impossible to exhaust the SLC cache fast enough to get into "folding", which is super slow since it's using NANDs in QLC mode. Additionally, when I bought them they were nearly $100 cheaper than the next "cheapest" 4TB NVME drive at $190 each, while now they're slightly more expensive and you have many other options within $20-50 that are better. On Fri, Jul 4, 2025, at 11:13 AM, Joseph Sinclair via PLUG-discuss wrote: > It's worth noting also, this drive should not hold the only copy of anything. > As the old saying goes, "two is one and one is none". Every important file > should be in at least two, and preferably three or more, places. > Also, data on "consumer grade" external USB flash drives should, generally, > be copied to a new drive about every 3 years if you want to be extra safe. > > On 7/4/25 09:45, Michael via PLUG-discuss wrote: > > thanks... I'm not as scared now > > > > > > On Fri, Jul 4, 2025 at 12:43 PM Ryan Petris via PLUG-discuss < > > [email protected]> wrote: > > > >> I've had NVME drives in usb enclosures disconnect under load; I don't know > >> if it was because they weren't responding fast enough, or they shut off due > >> to not being able to get enough power or due to heat. I've also had some > >> SATA USB controllers for older drives not implement UAS properly and would > >> disconnect because they weren't properly responding to commands. > >> > >> If it's the later you could try disabling UAS; if that is the cause you'll > >> loose a bit of speed but have a more reliable connection. I found this > >> article > >> <https://leo.leung.xyz/wiki/How_to_disable_USB_Attached_Storage_(UAS)> > >> which explains well how to disable it. > >> > >> Also, you should be able to look in the journal to see why it > >> disconnected. `journalctl -b` will give you the current boot logs and you > >> can page down to the time it disconnected to see what happened. > >> > >> On Fri, Jul 4, 2025, at 8:56 AM, Michael via PLUG-discuss wrote: > >> > >> I was looking for a picture on my backup media when the drive disappeared > >> on thunar. That made me scared! I thought I lost all my pictures. I > >> unplugged it then reinserted it but still it was not present. I switched > >> ports but still no good. I put it back the way I originally had it and all > >> was good. Any ideas as to why this would happen? > >> --------------------------------------------------- > >> PLUG-discuss mailing list: [email protected] > >> To subscribe, unsubscribe, or to change your mail settings: > >> https://lists.phxlinux.org/mailman/listinfo/plug-discuss > >> > >> > >> --------------------------------------------------- > >> PLUG-discuss mailing list: [email protected] > >> To subscribe, unsubscribe, or to change your mail settings: > >> https://lists.phxlinux.org/mailman/listinfo/plug-discuss > >> > > > > > > > > --------------------------------------------------- > > PLUG-discuss mailing list: [email protected] > > To subscribe, unsubscribe, or to change your mail settings: > > https://lists.phxlinux.org/mailman/listinfo/plug-discuss > --------------------------------------------------- > PLUG-discuss mailing list: [email protected] > To subscribe, unsubscribe, or to change your mail settings: > https://lists.phxlinux.org/mailman/listinfo/plug-discuss >
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