On Saturday, 9 March 2024 08:56:43 AEDT Piers via luv-main wrote: > Redit tells me: > > Critical Warning: 0x04 > > > Turns out, that according to Page 122 of the NVMe Document , Byte 00, > bit 4 (0x04) of the Critical Warning means: > > If set to ‘1’, then the volatile memory backup device has failed. This > field is only valid if the controller has a volatile memory backup > solution.
A SSD error will not make a process crash. But if a write fails or if certain types of critical read errors happen then the kernel may remount the filesystem read-only and some processes will crash if files they expect to be able to write to are suddenly read-only. > ~~~~~~~~~~~~~~~~~~~~~~~ > > webgen@webgen-01:~$ sudo smartctl -a /dev/nvme0 > > > SMART/Health Information (NVMe Log 0x02) > Critical Warning: 0x04 > Temperature: 52 Celsius > Available Spare: 100% > Available Spare Threshold: 10% > Percentage Used: 113% > Data Units Read: 4,391,625,218 [2.24 PB] > Data Units Written: 4,225,854,408 [2.16 PB] The Lenovo Yoga C740-14IML was apparently released in early 2020, so that's 2.16PB in 4 years. The specs on the Samsung SSD suggest that it was also released in early 2020 suggesting that you got it with the laptop and only used it for that. If that's the case you averaged 2.16*1000000000/4/365/3600=410MB/s 24*7 over the lifetime! How did you do that? Do you just have the system paging non-stop all the time? If you get to 113% of the TBW rating for a SSD you can't really complain. The more affordable NVMe devices have a low TBW rating, EG the Crucial P3 4TB has 800TBW, about a year for what you are doing. https://etbe.coker.com.au/2014/04/27/swap-breaking-ssd/ If I had a situation where I really needed to do a lot of writes on a laptop like that I would seriously consider buying a NVMe device every 8 months for the next couple of years and swap them out to systems that average 1TB per week. Normally workstations just don't wear out SSDs. For example the SSDs that I was using when I wrote the above blog post are still running nicely, they are now in the workstation my parents use and they will probably stop manufacturing machines with SATA ports before they wear out. The Samsung 990 Pro 4TB costs $600 from MSY and has 2400TBW rating, slightly more than what you currently have. So you could buy one of those every 4 years until laptops with 32G of RAM become affordable in the small and light form factor you like. Considering what a Yoga Fold costs new spending $600 every 4 years doesn't increase the operating cost much. If you had this happen on a workstation then adding more RAM would be easy and also U.2 storage devices with much higher TBW are cheap. U.2 devices rated at 13PBW or more are affordable. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/ _______________________________________________ luv-main mailing list -- [email protected] To unsubscribe send an email to [email protected]
