RN214 file system read-only (again)

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edkedk wrote:
Some weeks ago I replaced a disk that started to develop bad sectors.

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Ok.  And that resynced ok?

Perhaps enable ssh, and enter

# smartctl -x /dev/sda
# smartctl -x /dev/sdb
# smartctl -x /dev/sdc
# smartctl -x /dev/sdd

and look for saved errors for the drives.

For example, something like this:

Error 12 [11] occurred at disk power-on lifetime: 36166 hours (1506 days + 22 hours)
  When the command that caused the error occurred, the device was active or idle.

  After command completion occurred, registers were:
  ER -- ST COUNT  LBA_48  LH LM LL DV DC
  -- -- -- == -- == == == -- -- -- -- --
  40 -- 51 00 00 00 00 0c 27 df 40 40 00  Error: UNC at LBA = 0x0c27df40 = 203939648

  Commands leading to the command that caused the error were:
  CR FEATR COUNT  LBA_48  LH LM LL DV DC  Powered_Up_Time  Command/Feature_Name
  -- == -- == -- == == == -- -- -- -- --  ---------------  --------------------
  60 00 80 00 c8 00 00 0c 27 df 40 40 08  1d+08:15:46.204  READ FPDMA QUEUED
  60 00 08 00 c0 00 01 06 34 36 98 40 08  1d+08:15:46.163  READ FPDMA QUEUED
  60 00 80 00 b8 00 00 0c 27 e4 40 40 08  1d+08:15:46.146  READ FPDMA QUEUED
  60 00 80 00 b0 00 00 0c 27 e9 40 40 08  1d+08:15:46.123  READ FPDMA QUEUED
  60 00 80 00 a8 00 00 0c 27 ee 40 40 08  1d+08:15:46.094  READ FPDMA QUEUED