ZFS Failure

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dr_sherman

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Hi All,

I am looking at a friends FreeNAS setup which is facing some issues. He has x4 drives setup in a RAID5 type ZFS configuration. One of the drives seems to have completely failed (it can't even be detected by the BIOS).

However the real issue is that FreeNAS cannot see the ZFS volume despite being able to see the remaining x3 disks. In the GUI it simply says "0 Error". Here are some command outputs which may or may not be useful but can anybody recommend any suitable next steps, I would really like to restore the volume with the remaining disks!

Thanks!

[root@emerald ~]# zpool status -v
pool: freenas-boot
state: ONLINE
scan: scrub repaired 0 in 0h15m with 0 errors on Fri Feb 5 04:00:54 2016
config:

NAME STATE READ WRITE CKSUM
freenas-boot ONLINE 0 0 0
da0p2 ONLINE 0 0 0

errors: No known data errors



[root@emerald ~]# camcontrol devlist
<WDC WD30EFRX-68EUZN0 82.00A82> at scbus0 target 0 lun 0 (ada0,pass0)
<ST3000DM001-1CH166 CC27> at scbus1 target 0 lun 0 (ada1,pass1)
<ST3000DM001-1CH166 CC27> at scbus2 target 0 lun 0 (ada2,pass2)
<UFD USB Flash Drive 1100> at scbus4 target 0 lun 0 (pass3,da0)



[root@emerald ~]# gpart show
=> 34 31258557 da0 GPT (14G)
34 1024 1 bios-boot (512k)
1058 6 - free - (3.0k)
1064 31257520 2 freebsd-zfs (14G)
31258584 7 - free - (3.5k)

=> 34 5860533101 ada0 GPT (2.7T)
34 94 - free - (47k)
128 4194304 1 freebsd-swap (2.0G)
4194432 5856338696 2 freebsd-zfs (2.7T)
5860533128 7 - free - (3.5k)

=> 34 5860533101 ada1 GPT (2.7T)
34 94 - free - (47k)
128 4194304 1 freebsd-swap (2.0G)
4194432 5856338696 2 freebsd-zfs (2.7T)
5860533128 7 - free - (3.5k)

=> 34 5860533101 ada2 GPT (2.7T)
34 94 - free - (47k)
128 4194304 1 freebsd-swap (2.0G)
4194432 5856338696 2 freebsd-zfs (2.7T)
5860533128 7 - free - (3.5k)
 

depasseg

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So there isn't a RAID5. Are you sure he isn't using HW RAID?
 

Mirfster

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dr_sherman

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Thanks both.

I am 100% sure it is a software zfs pool (I set it up originally)

@Mirfster that's kind of my point the pool has just dropped off. This same NAS had a drive failure a few months ago (failed disk swapped out and the pool was resilvered). On that occasion I could still see the pool as "degraded" but not now :(
 
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First thing I would do is check the cables and if the drives are not connected directly to the MB I would pull the card and check it. Ports can go bad so try switching them around to empty ones and see what happens. Power could also be an issue, depends on the number of legs that the PSU has for outputs but if one was overloaded and it was a cheap PSU anything hooked to that feed will not power up correctly.

Honestly though we need more details on this as well. What hardware was used for the build, my feeling is always troubleshoot the tangible things you can touch first then look into the software part of it. This is doubly true since not long ago a drive had to be replaced something could have gotten moved and some dust in the connection, add a little extra humidity and things start acting up. Not to mention that we don't know if the drives are directly connected or in a backplane.
 

Ericloewe

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danb35

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Agreed, "zpool status" doesn't seem to show a pool composed of a vdev using multiple disks...
Of course, zpool status only shows the status of pools which are currently active, i.e., imported. That's why I (and Eric) asked for the output of 'zpool import', which will show the status of non-active pools attached to the system. If @dr_sherman will answer that question, we can see (or at least get a better idea) what's going on.
 

Mirfster

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Of course, zpool status only shows the status of pools which are currently active, i.e., imported. That's why I (and Eric) asked for the output of 'zpool import', which will show the status of non-active pools attached to the system. If @dr_sherman will answer that question, we can see (or at least get a better idea) what's going on.
Good point. Thanks for the clarification.
 

dr_sherman

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Hi All,

Thanks for the responses on this, let me try and answer in turn.

The NAS was originally built with x4 Seagate Barracudas (3TB), the failed drive was swapped with a WD Red (3TB). These are the drives you can see from the devlist above. The other components include an ASUS H81-M motherboard (this model has x4 SATA ports which each drive was connected to). I should have stated that I have already tried swapping the SATA cable / PSU / SATA port. Simply put one of the other (original) Seagate's is completely dead!

As requested here is the output of that command (interesting...):

[root@emerald ~]# zpool import
pool: Volume1
id: 3973379602928386388
state: FAULTED
status: One or more devices were being resilvered.
action: The pool cannot be imported due to damaged devices or data.
The pool may be active on another system, but can be imported using
the '-f' flag.
config:

Volume1 FAULTED corrupted data
raidz1-0 FAULTED corrupted data
gptid/635b94cc-bcf0-11e5-923b-10feed02559e ONLINE
494721017399712831 UNAVAIL cannot open
10855239658308860868 FAULTED corrupted data
gptid/a07ad634-0c02-11e4-8933-10feed02559e ONLINE


I have taken out the failed drive (so that explains the unavailable disk). Seems like one of the other drives has faulted which has caused the pool to fail I guess? I fear I know the answer already but is this recoverable?
 

danb35

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I fear I know the answer already but is this recoverable?
Unless you can get the faulted disk online, it will not be recoverable. What's the output of 'smartctl -a /dev/adaX' on that drive?
 

DrKK

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And sir, Seagate Shittacuda 3TB with this model number are notoriously destined for the scrap heap. You should have replaced ALL of the drives BEFORE they broke :)
 

depasseg

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Robert Trevellyan

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is this recoverable?
At this point, you have little to lose by attempting zpool import -f. Before doing so, plan for how you will copy data off the pool, just in case it succeeds, because you will be on borrowed time. You've definitely lost data, but there's a slim chance you haven't lost everything.
 

dr_sherman

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Messages
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To the points regarding the Seagate's - yup noted :D

@danb35 here are the outputs (I am not actually clear whether ADA1 or ADA2 has faulted):

ADA1
smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.3-RELEASE-p31 amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.14 (AF)
Device Model: ST3000DM001-1CH166
Serial Number: Z1F4GPZJ
LU WWN Device Id: 5 000c50 065c15567
Firmware Version: CC27
User Capacity: 3,000,592,982,016 bytes [3.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Wed Mar 9 09:32:15 2016 GMT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
See vendor-specific Attribute list for marginal Attributes.

General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 575) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off supp
ort.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 333) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x3085) SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_
FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 119 099 006 Pre-fail Always -
226143560
3 Spin_Up_Time 0x0003 093 093 000 Pre-fail Always -
0
4 Start_Stop_Count 0x0032 096 096 020 Old_age Always -
4555
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always -
0
7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail Always -
215051508
9 Power_On_Hours 0x0032 085 085 000 Old_age Always -
13786
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always -
0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always -
103
183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always -
0
184 End-to-End_Error 0x0032 100 100 099 Old_age Always -
0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always -
0
188 Command_Timeout 0x0032 100 100 000 Old_age Always -
0 0 0
189 High_Fly_Writes 0x003a 100 100 000 Old_age Always -
0
190 Airflow_Temperature_Cel 0x0022 071 039 045 Old_age Always In_th
e_past 29 (14 89 29 16 0)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always -
0
192 Power-Off_Retract_Count 0x0032 098 098 000 Old_age Always -
4534
193 Load_Cycle_Count 0x0032 098 098 000 Old_age Always -
4841
194 Temperature_Celsius 0x0022 029 061 000 Old_age Always -
29 (0 12 0 0 0)
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always -
0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline -
0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always -
0
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline -
13636h+37m+18.776s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline -
21237623670
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline -
201204216655

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]

SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.



ADA2:
smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.3-RELEASE-p31 amd64] (local build)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family: Seagate Barracuda 7200.14 (AF)
Device Model: ST3000DM001-1CH166
Serial Number: Z1F4GPP8
LU WWN Device Id: 5 000c50 065c18a4d
Firmware Version: CC27
User Capacity: 3,000,592,982,016 bytes [3.00 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-2, ACS-3 T13/2161-D revision 3b
SATA Version is: SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Wed Mar 9 09:27:24 2016 GMT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 575) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off supp
ort.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 328) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x3085) SCT Status supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_
FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 114 099 006 Pre-fail Always -
72408488
3 Spin_Up_Time 0x0003 093 093 000 Pre-fail Always -
0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always -
103
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always -
0
7 Seek_Error_Rate 0x000f 083 060 030 Pre-fail Always -
220676728
9 Power_On_Hours 0x0032 085 085 000 Old_age Always -
13834
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always -
0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always -
103
183 Runtime_Bad_Block 0x0032 100 100 000 Old_age Always -
0
184 End-to-End_Error 0x0032 100 100 099 Old_age Always -
0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always -
0
188 Command_Timeout 0x0032 100 099 000 Old_age Always -
0 0 1
189 High_Fly_Writes 0x003a 092 092 000 Old_age Always -
8
190 Airflow_Temperature_Cel 0x0022 074 047 045 Old_age Always -
26 (Min/Max 17/26)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always -
0
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always -
82
193 Load_Cycle_Count 0x0032 100 100 000 Old_age Always -
207
194 Temperature_Celsius 0x0022 026 053 000 Old_age Always -
26 (0 12 0 0 0)
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always -
8
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline -
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always -
0
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline -
13809h+53m+02.960s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline -
20378191779
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline -
223347014500

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
No self-tests have been logged. [To run self-tests, use: smartctl -t]

SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.


Thanks @Robert Trevellyan. Most of the content is backed up elsewhere but there is a small percentage that isn't that I would like to recover for him. I will attempted the forced import as a last resort!

I know I have said it a few times already but thank you everybody thus far for your help here...
 
Last edited:

Mirfster

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Oct 2, 2015
Messages
3,215
Could you please edit your post and put the output in CODE tags... Makes life much easier for us. :)

Quick review showed this:
ADA2:
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 8

Reference: https://en.wikipedia.org/wiki/S.M.A.R.T. for info.
 
Last edited:

danb35

Hall of Famer
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Messages
15,457
Nothing looks obviously wrong with either of those drives, other than that neither of them has run a SMART self-test in its 13,000-hour life. The "current pending sector" count that @Mirfster mentions isn't a good thing, but I really doubt it's what's causing your problem. What about the SMART output on the third drive, ada0?
 

dr_sherman

Dabbler
Joined
Nov 23, 2013
Messages
29
So ADA0 looks fine:
Code:
smartctl 6.3 2014-07-26 r3976 [FreeBSD 9.3-RELEASE-p31 amd64] (local build)                                                        
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org                                                        
                                                                                                                                   
=== START OF INFORMATION SECTION ===                                                                                               
Model Family:     Western Digital Red                                                                                              
Device Model:     WDC WD30EFRX-68EUZN0                                                                                             
Serial Number:    WD-WCC4N6LU7TA9                                                                                                  
LU WWN Device Id: 5 0014ee 20cc0d7e7                                                                                               
Firmware Version: 82.00A82                                                                                                         
User Capacity:    3,000,592,982,016 bytes [3.00 TB]                                                                                
Sector Sizes:     512 bytes logical, 4096 bytes physical                                                                           
Rotation Rate:    5400 rpm                                                                                                         
Device is:        In smartctl database [for details use: -P show]                                                                  
ATA Version is:   ACS-2 (minor revision not indicated)                                                                             
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)                                                                           
Local Time is:    Wed Mar  9 17:25:11 2016 GMT                                                                                     
SMART support is: Available - device has SMART capability.                                                                         
SMART support is: Enabled                                                                                                          
                                                                                                                                   
=== START OF READ SMART DATA SECTION ===                                                                                           
SMART overall-health self-assessment test result: PASSED                                                                           
                                                                                                                                   
General SMART Values:                                                                                                              
Offline data collection status:  (0x00) Offline data collection activity                                                           
                                        was never started.                                                                         
                                        Auto Offline Data Collection: Disabled.                                                    
Self-test execution status:      (   0) The previous self-test routine completed                                                   
                                        without error or no self-test has ever                                                     
                                        been run.                                                                                  
Total time to complete Offline                                                                                                     
data collection:                (40380) seconds.                                                                                   
Offline data collection                                                                                                            
capabilities:                    (0x7b) SMART execute Offline immediate.                                                           
                                        Auto Offline data collection on/off support.                                               
                                        Suspend Offline collection upon new                                                        
                                        command.                                                                                   
                                        Offline surface scan supported.                                                            
                                        Self-test supported.                                                                       
                                        Conveyance Self-test supported.                                                            
                                        Selective Self-test supported.                                                             
SMART capabilities:            (0x0003) Saves SMART data before entering                                                           
                                        power-saving mode.                                                                         
                                        Supports SMART auto save timer.                                                            
Error logging capability:        (0x01) Error logging supported.                                                                   
                                        General Purpose Logging supported.                                                         
Short self-test routine                                                                                                            
recommended polling time:        (   2) minutes.                                                                                   
Extended self-test routine                                                                                                         
recommended polling time:        ( 405) minutes.  
Conveyance self-test routine                                                                                                       
recommended polling time:        (   5) minutes.                                                                                   
SCT capabilities:              (0x703d) SCT Status supported.                                                                      
                                        SCT Error Recovery Control supported.                                                      
                                        SCT Feature Control supported.                                                             
                                        SCT Data Table supported.                                                                  
                                                                                                                                   
SMART Attributes Data Structure revision number: 16                                                                                
Vendor Specific SMART Attributes with Thresholds:                                                                                  
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE                                   
  1 Raw_Read_Error_Rate     0x002f   200   200   051    Pre-fail  Always       -       0                                           
  3 Spin_Up_Time            0x0027   179   179   021    Pre-fail  Always       -       6016                                        
  4 Start_Stop_Count        0x0032   100   100   000    Old_age   Always       -       20                                          
  5 Reallocated_Sector_Ct   0x0033   200   200   140    Pre-fail  Always       -       0                                           
  7 Seek_Error_Rate         0x002e   200   200   000    Old_age   Always       -       0                                           
  9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       1159                                        
10 Spin_Retry_Count        0x0032   100   253   000    Old_age   Always       -       0                                           
11 Calibration_Retry_Count 0x0032   100   253   000    Old_age   Always       -       0                                           
12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       20                                          
192 Power-Off_Retract_Count 0x0032   200   200   000    Old_age   Always       -       13                                          
193 Load_Cycle_Count        0x0032   200   200   000    Old_age   Always       -       215                                         
194 Temperature_Celsius     0x0022   129   096   000    Old_age   Always       -       21                                          
196 Reallocated_Event_Count 0x0032   200   200   000    Old_age   Always       -       0                                           
197 Current_Pending_Sector  0x0032   200   200   000    Old_age   Always       -       0                                           
198 Offline_Uncorrectable   0x0030   100   253   000    Old_age   Offline      -       0                                           
199 UDMA_CRC_Error_Count    0x0032   200   200   000    Old_age   Always       -       0                                           
200 Multi_Zone_Error_Rate   0x0008   100   253   000    Old_age   Offline      -       0                                           
                                                                                                                                   
SMART Error Log Version: 1                                                                                                         
No Errors Logged                                                                                                                   
                                                                                                                                   
SMART Self-test log structure revision number 1                                                                                    
No self-tests have been logged.  [To run self-tests, use: smartctl -t]                                                             
                                                                                                                                   
SMART Selective self-test log data structure revision number 1                                                                     
SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS                                                                                       
    1        0        0  Not_testing                                                                                               
    2        0        0  Not_testing                                                                                               
    3        0        0  Not_testing                                                                                               
    4        0        0  Not_testing                                                                                               
    5        0        0  Not_testing                                                                                               
Selective self-test flags (0x0):                                                                                                   
  After scanning selected spans, do NOT read-scan remainder of disk.                                                               
If Selective self-test is pending on power-up, resume after 0 minute delay.                                                                                                                                          



Regarding ADA2 I have just spotted this alert in the console "Device: /dev/ada2, 8 Offline uncorrectable sectors". So I suspect this might been the reason?
 

danb35

Hall of Famer
Joined
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Messages
15,457
Regarding ADA2 I have just spotted this alert in the console "Device: /dev/ada2, 8 Offline uncorrectable sectors". So I suspect this might been the reason?
I wouldn't think so, but admittedly it's the only thing that's looking like a problem so far.
 
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