On Mon, 29 Jul 2019 at 13:28, Stewart C. Russell via talk <talk@gtalug.org> wrote:
I'm guessing this is bad, right?
[Mon Jul 29 12:59:48 2019] print_req_error: critical medium error, dev nvme0n1, sector 296089600 flags 80700 [Mon Jul 29 12:59:48 2019] print_req_error: critical medium error, dev nvme0n1, sector 296089744 flags 0
Is it an oh-shit-get-yerself-a-new-drive-NOW thing, or …?
Drive is a 2+ year old Intel 512 GB SSD. Not entirely sure what the right diagnostics are for SSDs. Filesystem is showing clean but touching certain known-bad files triggers the error in the system log.
Dunno if these nvme stats are useful:
Smart Log for NVME device:nvme0 namespace-id:ffffffff critical_warning : 0 temperature : 25 C available_spare : 85% available_spare_threshold : 10% percentage_used : 1% data_units_read : 10,349,479 data_units_written : 10,098,299 host_read_commands : 183,018,841 host_write_commands : 136,702,227 controller_busy_time : 1,342 power_cycles : 201 power_on_hours : 15,722 unsafe_shutdowns : 10 media_errors : 803 num_err_log_entries : 844 Warning Temperature Time : 0 Critical Composite Temperature Time : 0 Thermal Management T1 Trans Count : 0 Thermal Management T2 Trans Count : 0 Thermal Management T1 Total Time : 0 Thermal Management T2 Total Time : 0
Any suggestions, please, for:
* what I should be looking for in stats (nvme smart-log-add doesn't give me anything at all, so no wear-levelling stats)
* a decent brand to replace it with. I'm likely okay with a SATA SSD.
cheers, Stewart
The log doesn't sound like heavy use ... and yet that sounds like an "oh-shit-get-yerself-a-new-drive-NOW" error to me. At the very least, stay on top of your backups. As I understand it, when "segments" go bad on a solid state drive (hell, even on a spinning disk these days), the drive firmware should silently move the data and you'd never even know it happened. That you're seeing the errors is alarming and suggests a fairly serious malfunction. But ... I have no expertise with SSD (or NVMe) drives - I have a few, but none have failed so I haven't had to learn. Ignore this suggestion if you get advice from someone with more knowledge of those drives ... -- Giles https://www.gilesorr.com/ gilesorr@gmail.com