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GenDev
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R720 - Frequent "Physical Device Reset" on Disks

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Hello!

We are noticing more frequent "Disk X in Backplane 1 of Integrated RAID Controller 1 was reset" notices. We have 7 drives in a RAID6. Out of those 6 are Samsung 850s and one is a 860. The 860 was recently installed due to a failed drive. It seems like these notices have been happening since they 860 was installed but it may just be a coincidence. We get the notice for the disk that was replaced at least once a week. Less frequently, we will see the notice reference other disks as well.

The notification says it is part of normal operation but the frequency of it has us a bit concerned. All seems to be running just fine, though.

Any thoughts? Can this truly be ignored or is this a sign of something more serious?

We are using a PERC H710 Mini. Firmware is 21.3.5-0002 (latest).

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DellEMC

Re: R720 - Frequent "Physical Device Reset" on Disks

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Is physical disk 5 the 860? Your log has a lot of entries on disk 5 for SAS discovery. It looks like the drive isn't responding to discovery, the PERC times out, then we see the internal device reset. for port 0. I'd hazard a guess that most of your drives are going to be connected to port 0, so when that port gets reset to try to complete the discovery event repeating in the logs it would affect logs for the other disks.

I'm not seeing anything that would normally jump out as a concern, though.

#Iwork4Dell

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DellEMC

Re: R720 - Frequent "Physical Device Reset" on Disks

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Are these the Samsung Evo/Pro drives? If so, them not being validated may be a part of it. If you want to export a PERC log and attach it to the thread, the community would be able to give it a look and perhaps discover new information. 

I can say that I used all unsupported drives in my R710 at home, got a pretty large amount of drive resets, but as a user, I never had any problems. I only knew of the messages because I looked, not because of anything symptomatic.

#Iwork4Dell
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GenDev
1 Copper

Re: R720 - Frequent "Physical Device Reset" on Disks

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Yup, 850/860 Pros. Yeah, I haven't noticed any issues. Just weird that it would start happening all of a sudden.

I have the PERC log, but I'm a newb to the forum and am not seeing how to attach it. Just copy/paste it into the thread?

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DellEMC

Re: R720 - Frequent "Physical Device Reset" on Disks

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You should have a drag and drop attachment option below the text box for you to reply. If you don't see one, send me a direct message.

#Iwork4Dell
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DellEMC

Re: R720 - Frequent "Physical Device Reset" on Disks

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Is physical disk 5 the 860? Your log has a lot of entries on disk 5 for SAS discovery. It looks like the drive isn't responding to discovery, the PERC times out, then we see the internal device reset. for port 0. I'd hazard a guess that most of your drives are going to be connected to port 0, so when that port gets reset to try to complete the discovery event repeating in the logs it would affect logs for the other disks.

I'm not seeing anything that would normally jump out as a concern, though.

#Iwork4Dell

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GenDev
1 Copper

Re: R720 - Frequent "Physical Device Reset" on Disks

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Yeah, disk 5 is the 860. The rest are 850. My rudimentary guess was the firmware in the 860 isn't "playing nice" with the controller and triggering the issue which would make sense since this all started happening since we put in the 860.

This server still has the ancient MegaRaid Storage Manager software on it. When the disk resets, MegaRaid shows the "PD Reset" as "critical". So, on one hand, the iDrac says everything is good then, on the other hand, MegaRaid says there is a critical issue. But, honestly, I take what Megaraid says with a grain of salt. It tends to say everything is critical when it normal operation.

I appreciate the advice, though!

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