Replace Failing Disk during resilver Raidz1

[maydo]

Hi,

raidz1 with 8 disks
One Disk was failing, so we have replaced it, and resilver started, but accidently we have replaced with another failing disk.
Resilver is running but very slow.

Can we replace this disk again during resilver ? What is the best way,

Set Offline both ? and Replace with another ?

/dev/gptid/ec2b56eb-339c-11ea-9120-0cc47ae11bfa
da1p2

Code:

      306G resilvered, 8.21% done, 1 days 06:55:30 to go
config:

        NAME                                              STATE     READ WRITE CKSUM
        tank1                                             DEGRADED     0     0     0
          raidz1-0                                        DEGRADED     0     0     0
            gptid/47c4f7d5-3490-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
            gptid/f9d31973-e208-11ea-8e48-0cc47ae11bfa    ONLINE       0     0     0
            replacing-2                                   REMOVED      0     0     0
              2492921301856966889                         REMOVED      0     0     0  was /dev/gptid/ec2b56eb-339c-11ea-9120-0cc47ae11bfa
              gptid/1dba1e3c-e5d8-11ea-8e48-0cc47ae11bfa  ONLINE       0     0     0
            gptid/c96da8bc-3c42-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
            gptid/6a201e9a-34d3-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
            gptid/105c4799-3205-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
            gptid/e1fbf566-36bb-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
            gptid/f95e8ab2-351a-11ea-9120-0cc47ae11bfa    ONLINE       0     0     0
        logs
          gptid/85fdda9a-08ad-11e7-8dd6-0cc47ae11bfa      ONLINE       0     0     0
        cache
          gptid/e47df539-16c2-11ea-9120-0cc47ae11bfa      ONLINE       0     0     0

errors: No known data errors

Code:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000b   100   100   016    Pre-fail  Always       -       0
  2 Throughput_Performance  0x0005   134   134   054    Pre-fail  Offline      -       104
  3 Spin_Up_Time            0x0007   144   144   024    Pre-fail  Always       -       448 (Average 468)
  4 Start_Stop_Count        0x0012   100   100   000    Old_age   Always       -       13
  5 Reallocated_Sector_Ct   0x0033   100   100   005    Pre-fail  Always       -       0
  7 Seek_Error_Rate         0x000b   100   100   067    Pre-fail  Always       -       0
  8 Seek_Time_Performance   0x0005   128   128   020    Pre-fail  Offline      -       18
  9 Power_On_Hours          0x0012   100   100   000    Old_age   Always       -       176
 10 Spin_Retry_Count        0x0013   100   100   060    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       13
 22 Helium_Level            0x0023   001   001   025    Pre-fail  Always   FAILING_NOW 1
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       20
193 Load_Cycle_Count        0x0012   100   100   000    Old_age   Always       -       20
194 Temperature_Celsius     0x0002   171   171   000    Old_age   Always       -       35 (Min/Max 23/35)
196 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
197 Current_Pending_Sector  0x0022   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0008   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x000a   200   200   000    Old_age   Always       -       0

 

[maydo]

there is also some disk slots free on the machine, so we can install another disk to a free slot
and replace the removed
2492921301856966889 REMOVED 0 0 0 was /dev/gptid/ec2b56eb-339c-11ea-9120-0cc47ae11bfa
during resilver with the new installed disk on free slot ?
would this work ?

 

[Yorick]

Someone over yonder had the same problem. They offlined the failing replacement, put in a new tested disk, and restarted the resilver, which then completed. See https://www.reddit.com/r/freenas/comments/c0xp4y/replaced_disk_failing_during_resilver/

raidz1 with 8 disks

Brave. I'll assume you have excellent backups and losing the entire pool is only a minor inconvenience.

 

[maydo]

thank you for the link
i have just "hotswapped" the resilvering disk, and it started resilvering again.
seems fine

the pool is a backup pool for another, so data is safe