My cache drive is no longer visible, I did reboot my array to install a new power supply. When I power up the array the cache drive is nowhere to be found. 

I removed the NVMe and tried it on a different machine it is working fine, I install it back in Unraid still could not see it.

I remove it once more and reformat the drive in another computer hoping that would make it visible to Unraid where at least it would let me add it and reformat it but no go still the drive does not show up.

I have tried to move the NVMe to a different slot in the mother board but still I can't see that drive. Please advise, thank you.

ark-diagnostics-20230813-1909.zip

No NVMe device is being detected by Linux, can you boot a different OS in that server to see if there's any difference? Like Windows or Ubuntu running from a flash drive.

 

 

Hi Jorge,

I did boot up Ubuntu from a USB drive and looked in disks and I can't see the NVMe.

I have been using the NVMe for a while in Unraid never had a problem is weird that it is not recognized by the OS.

I removed it again and moved it to my Windows 11 computer and it did work no issues at all, the NVMe is housed in a "SABRENT NVMe M.2 SSD to PCIe" no issues there that I can see, in Windows is working as it should I was able to make a folder and copy data to it.

What could I check/do now? Thank you for all your help.

I would make sure that you have all of the PSU connections properly seated on your mobo, since that is the only thing you changed. That is where I’d start anyway, since you know the nvme drive is working. 

Thanks Rodan, I gave it a check everything looks in place nothing loose. I can see the activity lights on the NVMe blinking.

Is a mystery to me what could it be

7 hours ago, Recoil said:

I did boot up Ubuntu from a USB drive and looked in disks and I can't see the NVMe.

Try using a different NVMe device if available, if the same it's likely a board problem.

Ok, I am going to have to order another one since this is the only one I have. I'll let you know in a few days how it goes.

Can I ask you if there is one brand/model of NVMe to PCIe  better than others for Unraid?

Edited August 15, 20232 yr by Recoil

Most should work fine, I would avoid less known brands, I for for example use Samsung, Kingston, Kioxia/Toshiba, WD, etc

Thank you Jorge, I see what I can find in my area. I'll let you know how it goes.

I did get another NVMe to PCIe adaptor put the SSD in it and it did not work  

I moved the NVMe to PCIe adaptor with the SSD drive to another computer it works fine.

I changed the SSD to a different one in the same NVMe to PCIe adaptor and it did work, Unraid can see it.

So it seems it is the SSD that refuses to work with Unraid. The weirdest thing is this SSD was working correctly since I build my array I never had a problem with it before. It works just fine in another computer.

I am scratching my head trying to figure out what could have changed in a reboot to make that SSD stop working in the Unraid computer only, it seems to work correctly everywhere else.

I have scour everywhere for a solution the closest thing I can deduct is that it has to do with the new power supply.

The power supply I was using before was probably a 10+ years old that was noisy compared with this new one "Corsiar RM750e".

For what I can find some people have  issues with the 3.3v in the SATA power plug, they have to disable pin 3 to make the HD work with this new power supplies however. that is with SATA disks, the NVMe get's it power through the Motherboard so I do not know how could the new PSU affect the NVMe.

Anyhow I am throwing it here in case someone has a better understanding if there is any correlation.

At the moment I am stumped and the only solution is to stick to Samsung NVMe's those seem to be the ones that work regardless of what power supply I use.

I have close to the same issue. I had to change the battery in the UPS and the shutdown and restart now shows missing cache. It worked for close to 5 years with no issue. 

 

I changed cables too and nothing. 

Edited October 4, 20241 yr by Turboenterprise

Attach Diagnostics to your NEXT post in this thread 

HERES the full diagnostic zip file

tower-diagnostics-20241003-1839.zip

33 minutes ago, Turboenterprise said:

HERES the full diagnostic zip file

Device is not being detected, try swapping both cables with a disk, if the same it's likely a device problem.