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lfrye's avatar
lfrye
Aspirant
Jul 19, 2019
Solved

ReadyNAS RN3220 Volume is Degraded but all green lights & no errors on disks

Hello,   I'll start by stating I do not know what this "*Select Location" thing is while creating this discussion, so I apoligize if I used the wrong "Location".   Here is the issue: I have a Ne...
  • JohnCM_S's avatar
    JohnCM_S
    Jul 23, 2019

    Hi lfrye,

     

    I agree with StephenB. Replacing the faulty drive will be the best option.

     

    Regards,

lfrye's avatar
lfrye
Aspirant
Jul 19, 2019

Hi John,

 

Thank you for the reply.

 

This is kinda odd since there hasn't been any changes to the RAID 6 array and this warning first came up on 7/11/2019. I would think this warning would have been here since the array was created years ago. How does that work?

 

Also, RAID 6 arrays can handle 2 drive failures since it uses two parity stripes on each disk. So I shouldn't be getting this warning message since RAID is redundant array of independent disks. Kinda odd aswell.

 

Can I send you the logs via OneDrive link?

 

Thank you,

Leif

JohnCM_S's avatar
JohnCM_S
NETGEAR Employee Retired
Jul 20, 2019

Hi lfrye,

 

Can I send you the logs via OneDrive link?

Yes, you can send the logs via OneDrive link.

 

Regards

  • lfrye's avatar
    lfrye
    Aspirant
    Jul 22, 2019

    Good morning,

     

    I just sent the logs over to John in a PM.

     

    Thank you,

    Leif

    • JohnCM_S's avatar
      JohnCM_S
      NETGEAR Employee Retired
      Jul 23, 2019

      Hi lfrye,

       

      I just saw your logs and it looks like disk 2 is already marked as faulty.

       

      md127 : active raid6 sde3[0] sda3[8] sdb3[5] sdc3[6] sdd3[7] sdi3[3] sdh3[2] sdf3[1](F)
            17552488704 blocks super 1.2 level 6, 64k chunk, algorithm 2 [8/7] [U_UUUUUU]

       

      Checking the disk_info.log, there are 5 current pending sectors on your disk 2.

       

      Device:             sdf
      Controller:         0
      Channel:            1
      Model:              WDC WD3000FYYZ-01UL1B1
      Serial:             XXXXXX

        ATA Error Count:                0
        Reallocated Sectors:            0
        Reallocation Events:            0
        Spin Retry Count:               0
        Current Pending Sector Count:   5
        Uncorrectable Sector Count:     0

       

      RAID 6 has 2 parity drives but if one fails, it is still degraded. The volume becomes degraded whenever one drive outside of the total number is out.

       

      Regards,

      • lfrye's avatar
        lfrye
        Aspirant
        Jul 23, 2019

        Hi JohnCM_S,

         

        Thank you for the info. Is there a way to fix this issue or is a drive replacement the best move forward?

         

        Thank you,

        Leif

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