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Dell MD3200i unreadable sectors

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Dell MD3200i unreadable sectors

This question has been answered by kevin_cambs_uk

Hi there

We have 2 of these disc units and they are performing lovely,however, we had a disc failure at the weekend, and I failed the disc, re inserted a new one and the array did its thing by rebuilding the RAID 5 array onto the hot spare and then once completed it then copied itself back to the replaced disc.

Upon the re build of the array, it came across 410 unreadable sectors, but upon reading various Dell forums this is not as catastrophic as it may first appear.

Our array has re built itself, all of the virtual machines are working perfectly and I can see no data loss. It seemed at the time the best course of action to keep going with it.

Now as everything seems to be satisfactory, is there a way of clearing off the attention alarm, so we can get back to a blue light, I do not want to do anything to upset it as its working fine at the moment, or should I be getting the data off and do something to it?

Any advice would be most welcome, but like I said there was a post by a Dell technician that said it was not always necessary to destroy the array and start again.

Thanks

Kev

Verified Answer
  • Right sorry for such a long delay, I just had to schedule in a window to take care of this, and to also ensure that if anything went wrong it was all backed up and verified.

    Anyway I did the clear log for the read errors, however, it did not clear the error on the disc shelf as I thought it might. It still shows 398 read errors on that VHD. The disc shelf still says Storage Array Needs Attention.

    I am right in thinking that these errors will never go away until that logical drive has been deleted and re built? Or is there some secret thing I am not aware of that allows me to clear them?

    Thanks again

    Kevin

All Replies
  • Hi,

    Is the enclosure LED that is amber or the drive LED? Try saving and then clearing the logs Page 244 http://downloads.dell.com/manuals/common/md3200i_md3220i_owner%27s%20manual_en.pdf

    Thanks,

    Josh Craig

    Dell EMC | Enterprise Support Services
    Get support on Twitter: @DellCaresPRO

    Download our QRL app: iOSAndroidWindows

  • Thanks for replying

    I will have a look at that tomorrow, but I am sure its the enclosure but will check the drives again.

    Going forward, I take it its okay overall?

    Thanks

    Kev

  • It looks like it is okay overall and nothing to worry about. 

    Thanks,

    Josh Craig

    Dell EMC | Enterprise Support Services
    Get support on Twitter: @DellCaresPRO

    Download our QRL app: iOSAndroidWindows

  • Done that mate but the light is still on, I think it wont go back to blue because the array in the storage manager is still showing the 410 unreadable sectors.

    What would you advise there, considering its all working okay so far......

    Thanks

    Kev

  • You can try to run a consistency check and see if it can fix the errors. 

    Thanks,

    Josh Craig

    Dell EMC | Enterprise Support Services
    Get support on Twitter: @DellCaresPRO

    Download our QRL app: iOSAndroidWindows

  • Sorry been bogged down with other issues, will take a look at the manual and see how I get on....

    Thanks again all, Kev

  • I am quite keen to clear the Unreadable Sectors , via the Modular Disk Storage Unit. I take it this will have no ill effects on the disc shelf and the VHD and data on it?

    I am quite keen to get the unit back to a blue light on the front not the flashing orange!

    If I type Yes in the box and clear them, does that mean they are still marked as unreadable, but the log is just clear. We have not noticed any ill effects from the rebuild of the array and the VMs on there are all still working and have had fresh block level backup completed against them.

    Thanks

    Kev

  • Right, it should just stop using those sectors and clear the error. 

    Thanks,

    Josh Craig

    Dell EMC | Enterprise Support Services
    Get support on Twitter: @DellCaresPRO

    Download our QRL app: iOSAndroidWindows

  • I will give that a go mate, many thanks!

  • Right sorry for such a long delay, I just had to schedule in a window to take care of this, and to also ensure that if anything went wrong it was all backed up and verified.

    Anyway I did the clear log for the read errors, however, it did not clear the error on the disc shelf as I thought it might. It still shows 398 read errors on that VHD. The disc shelf still says Storage Array Needs Attention.

    I am right in thinking that these errors will never go away until that logical drive has been deleted and re built? Or is there some secret thing I am not aware of that allows me to clear them?

    Thanks again

    Kevin

  • Update

    We have added some more storage to the device, and as a by product of adding this, which is unrelated to the other disc group, the needs Attention issue has gone away and it is now back to blue light on the unit and working properly.