Hello fellow unRaiders 

 

I would really need a little support. How can I make the Tower to forget it has a good parity drive and rebuild it?

 

I have now 3 x 2TB Data drives and bought a 4TB drive for parity. When I first replaced the 2TB parity for the new 4TB, the system found out it had a new drive and rebuild it. It was a success. But when I surfed this forum and saw I had "HPA?" in "myMain" I wanted to preclear it (which I forgot initially). So I took out the 4TB, connected to my second (spare) HW, 2nd USB and ran preclear successfully, which BTW completed in around 44hrs. However whey I connected the 4TB parity in my Tower, everything started up fine - all green dots. I find this strange, because the 4TB parity should be empty?

 

All in all I have data intact on my 3 x 2TB data drives and the parity should be empty so I would like to rebuild the parity. After that look into the "HPA?" status a little deeper.

Is there anyone out there to help me?

I use unRaid 5.0.5. pro.

 

Thank you in advance and all the best,

Hudo.

Not completely sure I understand what you mean by your spare HW. Do you mean another machine?

 

If you removed the parity drive and didn't restart until you replaced it, then unRAID has no way of knowing that anything was done to it on another machine.

 

Been a while since I've done this but you need to set a New Configuration on the Utilities page. Make sure you assign all the drives just like they were.

Since you know you "hosed" the parity drive, simply doing a New Config as trurl suggested is probably the best approach.

 

You could also "fix" the parity drive by simply doing a parity check ... there would be LOTS of "sync errors" corrected (statistically half of the blocks will be wrong) ... but when it's done parity will be correct      A correcting parity check always effectively just rebuilds parity, since any errors are assumed to be on the parity disk.

 

Very goo guys thank you

 

Yes spare HW I mean another hardware. We are talking here seperate USB + (MoBo, CPU, RAM, Power) + only one HDD (the affected 4TB). I completed the Preclear on the 4TB on this setup.

Another Yes, I didn't restart my Tower without the new 4TB parity. I dodn't touch the other hdd cables.

 

Minutes ago I did this:

- pulled out the power cord from 4TB HDD,

- started the Tower,

- it found out that parity was missing,

- I started the array without parity, it put a red dot on the parity spot.

- stopped the array and powered down the tower,

- attached the power back in 4TB HDD,

- started the Tower, configured the parity drive and started the array

- this lead into rebuilding the array, so that's what is doing now.

 

The only riddle now left is the "HPA?" on this drive:

WDC_WD40EZRX-00SPEB0_WD-WCC4E1564219 (sdd) 3907018532

I attached the syslog if you see anything suspicious?

 

All the best,

Hudo

syslog-2014-08-04.txt

The only riddle now left is the "HPA?" on this drive:

WDC_WD40EZRX-00SPEB0_WD-WCC4E1564219 (sdd) 3907018532

Quick hit/n/run diagnosis.

 

I haven't looked at your syslog, but from what you are describing, it may well be a false positive. There is a list of known good bytecount sizes listed in mymain, and if your version is older it may not have the 4TB size in there yet, so it lists as possible HPA. Try updating unmenu from the user scripts and see if that clears the message.

Agree with jonathanm => update UnMenu so you get the latest version of MyMain and then see if it still shows that.    If this is a new WD Red purchased as an internal drive (not one you removed from an external drive case), then it's almost certainly fine.

 

Alternatively ... I don't have a system handy with a 4TB drive, but anyone who does could simply look on the Web GUI and let you know if the size you listed [3907018532] matches theirs. 

Ohhh guys you're so great

That did the trick! Meanwhile the parity rebuilds I updated and restarted unMenu and voila!

Yes, I didn't update the unMenu for years now, since the unRaid 4.7 version.

 

So consider this case closed! 

Thank you!

 

All the best,

Hudo.