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Parity speed painfully slow - 5MBPS

Featured Replies

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What might be the reason?

Tips?

  • Community Expert

Go to Tools - Diagnostics and attach the complete diagnostics zip file to your next post.

  • Community Expert

Did you test any of your disks? Some of them seem pretty old. And some of them should be giving you SMART warnings on the Dashboard page as well as Notifications if you have setup Notifications. Disk3 isn't reporting SMART so that is an issue itself.

  • Community Expert

Disk2 looks past it's prime, possibly has some slow sectors, disk speed test might show something.

  • Author

No I haven't run any tests myself recently.

 

These dashboard warnings only started showing up recently, the server had a couple of abrupt poweroffs in the last 2 days.

 

What's the recommended way to keep my data intact since parity is no longer valid? I have spare PCs.

Should I replace Disk 2, build a new array (with the rest of the disks) and move the data from disk2 back in manually?

  • Community Expert

First would be good to confirm if it's a disk problem, and which disk it is, run the disk speed test, it's easy and it might show the culprit.

  • Author

I'm running it, and it's taking a long while for sdb. Seeing the disk speeds - it's probably the culprit.

  • Author

 

/dev/sdb: 2 MB/sec avg
/dev/sdc: 97 MB/sec avg
/dev/sdd: 142 MB/sec avg
/dev/sde: 156 MB/sec avg
/dev/sdf: 166 MB/sec avg
/dev/sdg: 430 MB/sec avg

 

  • Community Expert

That confirms it.

  • Author

Since Unraid no longer has a valid parity device, what would be the appropriate way to replace this hard drive?

  • Community Expert

Either wait for the parity sync to finish and replace the disk or try coping the data to another disk, but it's likely going to take a while, and hopefully the disk won't fail before that.

  • Author

This topic can be closed and marked as solved.

 

The issue was with the hard drive. 3 drives suddenly started to give SMART errors. One is super slow (1mbps) even in another PC, one I can't fix with seatools, and the other one I'm running seatools long fix to see if I can still use it.

 

Never buying Seagate again. All 3 drives were from different batches, from Seagate (the parity as well).

  • Community Expert
44 minutes ago, Fidelix said:

Never buying Seagate again.

The super slow one was a WD. And most were very old.

  • Author
5 minutes ago, trurl said:

The super slow one was a WD. And most were very old.

No, the WD was 97 MB/sec avg

The 1MBPS one was Seagate. The parity (which is no longer pre-clearing successfuly) is Seagate as well.

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