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i/o errors, Degraded, Failed Notices After Rebuilding Using DiskWarrior

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(@midihead7)
Posts: 56
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Topic starter
 

I am running Mac OS Sequoia 15.4.1 and SoftRAID 8.5 on a Thunderbay 4. I haven't had any issues show up from SoftRAID itself under normal operations. I have, however, recently noticed that when I run DiskWarrior 5.3.1 on my RAID 5 volume to rebuild the directory to improve efficiency, it successfully rebuilds the directory but then SoftRAID reports i/o errors, degraded, and failed notices. I can consistently reproduce this behavior. SoftRAID does not report these issues outside of running DiskWarrior on the volume. What would cause this behavior? I have attached screenshots and the report from SoftRAID (hopefully the images aren't broken).

 

 
Posted : 20/05/2025 11:40 am
(@softraid-support)
Posts: 9200
Member Admin
 

Just clear the IO counters. This is an old issue that sometimes happens, it essentially means the disks were asked to read from a non existent location, so they generated an IO error. Not a big deal. (its very difficult to fix, since we track IO errors and the driver cannot tell what caused the error, just that there was an error)

 
Posted : 21/05/2025 1:19 pm
(@midihead7)
Posts: 56
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Topic starter
 

When I clear the I/O counters and errors, the RAID still shows "degraded - failed" and the individual disks still show "data and parity disk - failed". I have to use the Recover Failed Disks option to make the volume display normally.

 
Posted : 27/05/2025 1:50 pm
(@softraid-support)
Posts: 9200
Member Admin
 

@midihead7 

That is correct. When all the disks generate IO errors, you often have to use "recover failed disks".

 
Posted : 27/05/2025 6:48 pm
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