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Disk with serial... cannot be found

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I have 2 servers that have a down status for physical drives. The disk with serial number could not be found (code:PE156). How do I clear this as both drives are fine?

dell prtg snmp-sensor

Created on Mar 23, 2015 3:13:31 PM by  strapani (0) 1



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Did you replace the disk in case or moved the PRTG probe to an other machine?

I think the only solution is to drop the sensor and add a new one.

Created on Mar 24, 2015 10:17:37 AM by  PRTGToolsFamily [prtgtoolsfamily.com] (12,725) 3 4



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I had this issue on two Physical disks on the same device. They were working fine, until the server reboot due to Windows updates. Then two didn't work, the other 14 worked just fine. It was on a Dell PowerEdge server and they were only two SSDs in the server (the rest were standard SATA and SAS). I thought the type of disk had something to do with it, but in the end it didn't. I tried upgrading RAID drivers and firmware, and that didn't fix it either.

Then I noticed the serial name listed in the error message (see below).

Error: The disk with serial number "425026040000ags/T43P" could not be found (code: PE156)

But this 'serial number' didn't match with I could see in iDRAC. The ones that were working correctly had the correct serial number. I tried to change it in PRTG (maybe there is a way, but I couldn't find it). So I removed the sensor and re-added the same disk, and sure enough it works, and with the correct serial number! I don't know why or how it changed (I'm assuming Dell's OMSA SNMP picked up a different number for the disk upon reboot), but removing and re-adding the sensor for the same disk allowed PRTG to look for the updated serial number.

Created on Oct 17, 2017 11:05:48 PM by  tdye (100) 1



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Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.