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Hdparm uninterruptible sleep

drwatson
in General Support

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I have been plagued by high wait times on one of my unRaid servers. After much searching and trial and error I have narrowed it down. I discovered that there were dozens of hdparm processes stuck in state D (state D is given in the ps command) which is for uninterruptible sleep. 

 

The drive that the hdparm command is executing against is a USB external Seagate drive. 

 

I removed the drive from the system and rebooted and so far I have not seen the high wait times anymore. 

 

Where do I look next? Could it be a USB problem? A drive problem? An hdparm command that the enclosure doesn't know how to handle?

 

Any help would be appreciated. 

 

 

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