Scrub Performance - General Concerns...

[Steve Beschakis]

OK, so before posting alot of detailed specs, please let me see if I can get away with just asking a sort of general question--everything might be fine; OTOH, I'm seeing some odd behavior, possibly indicative of an impending failure. So...

I have a 2-3-year old install, raidz2, 6 X 3TB WD NAS (red). Followed a good, high-spec build guide, and perf has been fine so far.

Noticed file transfer lag last week. Poked around, confirmed a scheduled scrub was on-going but taking a long time. No alerts, no errors, pool healthy. Zpool status output:

Code:

  pool: xxxxx
state: ONLINE
  scan: scrub in progress since Sun Apr 16 00:00:40 2017
  2.27T scanned out of 5.88T at 5.72M/s, 184h10m to go
  320K repaired, 38.51% done


  NAME  STATE  READ WRITE CKSUM
  xxxxx ONLINE  0  0  0
  raidz2-0  ONLINE  0  0  0
  gptid/04c93f66-9838-11e3-8946-002590d34819  ONLINE  0  0  0
  gptid/058644be-9838-11e3-8946-002590d34819  ONLINE  0  0  0
  gptid/05e6ecd1-9838-11e3-8946-002590d34819  ONLINE  0  0  0
  gptid/06481003-9838-11e3-8946-002590d34819  ONLINE  0  0  0
  gptid/07098bd4-9838-11e3-8946-002590d34819  ONLINE  0  0  0
  gptid/07c7728b-9838-11e3-8946-002590d34819  ONLINE  0  0  0  (repairing)

...All of the drives look like these two - I/O, proc, other metrics kick up simultaneously, as you'd expect for a data scrub operation. The logged start time in the status output seems a little odd compared with the graph, but that's another question. My main question is: why is that one disk shown 'repairing' when there are no alerts or errors, and why is this going to take something like 10 days? Wouldn't I be better off just offlining that drive and replacing it with an identical one? Not sure what's going on here. Thanks for any help..

 

[Dice]

Let's investigate what the SMART has to say about drive health.
Please provide the output of

Code:

smartctl -a /dev/adaX

X - for all drives.
Use code brackets for each post please.

 

[Steve Beschakis]

Hey, thanks for the reply! I ran the smart test for ada0 thru ada5 and got some revealing results. The output using '-a' is quite verbose, and although I retained the full output for each drive test as a separate txt file, posting the full output might be cumbersome here. I'm not really sure what the most useful section(s) might be, but I'll post a description of what I'm seeing, along with hopefully relevant snippets for each disk...
If I need to post more info from any of the tests, just lmk. I really appreciate the help! Looks like ada5 is the oddball. heh.

ada0:
====

Code:

SMART Error Log Version: 1   
No Errors Logged   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed without error  00%  27322  -   
# 2  Extended offline  Completed without error  00%  27186  -   
# 3  Short offline  Completed without error  00%  27082  -   
# 4  Short offline  Completed without error  00%  27010  -   
# 5  Short offline  Completed without error  00%  26914  -   
# 6  Short offline  Completed without error  00%  26580  -   
# 7  Extended offline  Completed without error  00%  26444  -   
# 8  Short offline  Completed without error  00%  26412  -   
# 9  Short offline  Completed without error  00%  26340  -   
#10  Short offline  Completed without error  00%  26244  -   
#11  Short offline  Completed without error  00%  25909  -   
#12  Extended offline  Completed without error  00%  25773  -   
#13  Short offline  Completed without error  00%  25669  -   
#14  Short offline  Completed without error  00%  25597  -   
#15  Short offline  Completed without error  00%  25501  -   
#16  Short offline  Completed without error  00%  25165  -   
#17  Extended offline  Completed without error  00%  25030  -   
#18  Short offline  Completed without error  00%  24926  -   
#19  Short offline  Completed without error  00%  24854  -   
#20  Short offline  Completed without error  00%  24758  -   
#21  Short offline  Completed without error  00%  24422  -

ada1:
====

Code:

SMART Error Log Version: 1   
No Errors Logged   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed without error  00%  27322  -   
# 2  Extended offline  Completed without error  00%  27187  -   
# 3  Short offline  Completed without error  00%  27082  -   
# 4  Short offline  Completed without error  00%  27010  -   
# 5  Short offline  Completed without error  00%  26914  -   
# 6  Short offline  Completed without error  00%  26580  -   
# 7  Extended offline  Completed without error  00%  26444  -   
# 8  Short offline  Completed without error  00%  26412  -   
# 9  Short offline  Completed without error  00%  26340  -   
#10  Short offline  Completed without error  00%  26244  -   
#11  Short offline  Completed without error  00%  25909  -   
#12  Extended offline  Completed without error  00%  25773  -   
#13  Short offline  Completed without error  00%  25669  -   
#14  Short offline  Completed without error  00%  25597  -   
#15  Short offline  Completed without error  00%  25501  -   
#16  Short offline  Completed without error  00%  25165  -   
#17  Extended offline  Completed without error  00%  25030  -   
#18  Short offline  Completed without error  00%  24926  -   
#19  Short offline  Completed without error  00%  24854  -   
#20  Short offline  Completed without error  00%  24758  -   
#21  Short offline  Completed without error  00%  24422  -

ada2:
====

Code:

SMART Error Log Version: 1   
No Errors Logged   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed without error  00%  27337  -   
# 2  Extended offline  Completed without error  00%  27202  -   
# 3  Short offline  Completed without error  00%  27097  -   
# 4  Short offline  Completed without error  00%  27025  -   
# 5  Short offline  Completed without error  00%  26929  -   
# 6  Short offline  Completed without error  00%  26595  -   
# 7  Extended offline  Completed without error  00%  26459  -   
# 8  Short offline  Completed without error  00%  26427  -   
# 9  Short offline  Completed without error  00%  26355  -   
#10  Short offline  Completed without error  00%  26259  -   
#11  Short offline  Completed without error  00%  25924  -   
#12  Extended offline  Completed without error  00%  25788  -   
#13  Short offline  Completed without error  00%  25684  -   
#14  Short offline  Completed without error  00%  25612  -   
#15  Short offline  Completed without error  00%  25516  -   
#16  Short offline  Completed without error  00%  25180  -   
#17  Extended offline  Completed without error  00%  25045  -   
#18  Short offline  Completed without error  00%  24941  -   
#19  Short offline  Completed without error  00%  24869  -   
#20  Short offline  Completed without error  00%  24773  -   
#21  Short offline  Completed without error  00%  24437  -

ada3:
===

Code:

SMART Error Log Version: 1   
No Errors Logged   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed: read failure  60%  27337  1565560704   
# 2  Extended offline  Completed: read failure  10%  27201  1565560704   
# 3  Short offline  Completed: read failure  60%  27097  1565560704   
# 4  Short offline  Completed: read failure  60%  27025  1565560704   
# 5  Short offline  Completed: read failure  60%  26929  1565560704   
# 6  Short offline  Completed: read failure  60%  26594  1565560704   
# 7  Extended offline  Completed: read failure  10%  26459  1565560704   
# 8  Short offline  Completed: read failure  60%  26427  1565560704   
# 9  Short offline  Completed: read failure  60%  26355  1565560704   
#10  Short offline  Completed: read failure  60%  26259  1565560704   
#11  Short offline  Completed: read failure  60%  25923  1565560704   
#12  Extended offline  Completed: read failure  10%  25787  1565560704   
#13  Short offline  Completed: read failure  60%  25683  1565560704   
#14  Short offline  Completed: read failure  60%  25611  1565560704   
#15  Short offline  Completed: read failure  60%  25516  1565560704   
#16  Short offline  Completed: read failure  60%  25180  1565560704   
#17  Extended offline  Completed: read failure  10%  25044  1565560704   
#18  Short offline  Completed: read failure  60%  24940  1565560704   
#19  Short offline  Completed: read failure  60%  24868  1565560704   
#20  Short offline  Completed: read failure  60%  24772  1565560704   
#21  Short offline  Completed without error  00%  24437  -

ada4:
====

Code:

SMART Error Log Version: 1   
No Errors Logged   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed without error  00%  27322  -   
# 2  Extended offline  Completed without error  00%  27187  -   
# 3  Short offline  Completed without error  00%  27082  -   
# 4  Short offline  Completed without error  00%  27010  -   
# 5  Short offline  Completed without error  00%  26915  -   
# 6  Short offline  Completed without error  00%  26580  -   
# 7  Extended offline  Completed without error  00%  26445  -   
# 8  Short offline  Completed without error  00%  26412  -   
# 9  Short offline  Completed without error  00%  26340  -   
#10  Short offline  Completed without error  00%  26244  -   
#11  Short offline  Completed without error  00%  25909  -   
#12  Extended offline  Completed without error  00%  25773  -   
#13  Short offline  Completed without error  00%  25669  -   
#14  Short offline  Completed without error  00%  25597  -   
#15  Short offline  Completed without error  00%  25501  -   
#16  Short offline  Completed without error  00%  25165  -   
#17  Extended offline  Completed without error  00%  25030  -   
#18  Short offline  Completed without error  00%  24926  -   
#19  Short offline  Completed without error  00%  24854  -   
#20  Short offline  Completed without error  00%  24758  -   
#21  Short offline  Completed without error  00%  24422  -

ada5:

Code:

SMART Error Log Version: 1   
ATA Error Count: 725 (device log contains only the most recent five errors)   
  CR = Command Register [HEX]   
  FR = Features Register [HEX]   
  SC = Sector Count Register [HEX]   
  SN = Sector Number Register [HEX]   
  CL = Cylinder Low Register [HEX]   
  CH = Cylinder High Register [HEX]   
  DH = Device/Head Register [HEX]   
  DC = Device Command Register [HEX]   
  ER = Error register [HEX]   
  ST = Status register [HEX]   
Powered_Up_Time is measured from power on, and printed as   
DDd+hh:mm:SS.sss where DD=days, hh=hours, mm=minutes,   
SS=sec, and sss=millisec. It "wraps" after 49.710 days.   
   
Error 725 occurred at disk power-on lifetime: 27544 hours (1147 days + 16 hours)   
  When the command that caused the error occurred, the device was active or idle.   
   
  After command completion occurred, registers were:   
  ER ST SC SN CL CH DH   
  40 51 01 80 00 40 40  Error: UNC 1 sectors at LBA = 0x00400080 = 4194432   
   
  Commands leading to the command that caused the error were:   
  CR FR SC SN CL CH DH DC  Powered_Up_Time  Command/Feature_Name   
  -- -- -- -- -- -- -- --  ----------------  --------------------   
  c8 00 01 80 00 40 40 08  38d+22:44:33.109  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:29.570  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:26.030  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:22.490  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:19.066  READ DMA   
   
Error 724 occurred at disk power-on lifetime: 27544 hours (1147 days + 16 hours)   
  When the command that caused the error occurred, the device was active or idle.   
   
  After command completion occurred, registers were:   
  ER ST SC SN CL CH DH   
  -- -- -- -- -- -- --   
  40 51 01 80 00 40 40  Error: UNC 1 sectors at LBA = 0x00400080 = 4194432   
   
  Commands leading to the command that caused the error were:   
  CR FR SC SN CL CH DH DC  Powered_Up_Time  Command/Feature_Name   
  -- -- -- -- -- -- -- --  ----------------  --------------------   
  c8 00 01 80 00 40 40 08  38d+22:44:29.570  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:26.030  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:22.490  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:19.066  READ DMA   
   
Error 723 occurred at disk power-on lifetime: 27544 hours (1147 days + 16 hours)   
  When the command that caused the error occurred, the device was active or idle.   
   
  After command completion occurred, registers were:   
  ER ST SC SN CL CH DH   
  -- -- -- -- -- -- --   
  40 51 01 80 00 40 40  Error: UNC 1 sectors at LBA = 0x00400080 = 4194432   
   
  Commands leading to the command that caused the error were:   
  CR FR SC SN CL CH DH DC  Powered_Up_Time  Command/Feature_Name   
  -- -- -- -- -- -- -- --  ----------------  --------------------   
  c8 00 01 80 00 40 40 08  38d+22:44:26.030  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:22.490  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:19.066  READ DMA   
   
Error 722 occurred at disk power-on lifetime: 27544 hours (1147 days + 16 hours)   
  When the command that caused the error occurred, the device was active or idle.   
   
  After command completion occurred, registers were:   
  ER ST SC SN CL CH DH   
  -- -- -- -- -- -- --   
  40 51 01 80 00 40 40  Error: UNC 1 sectors at LBA = 0x00400080 = 4194432   
  Commands leading to the command that caused the error were:   
  CR FR SC SN CL CH DH DC  Powered_Up_Time  Command/Feature_Name   
  -- -- -- -- -- -- -- --  ----------------  --------------------   
  c8 00 01 80 00 40 40 08  38d+22:44:22.490  READ DMA   
  c8 00 01 80 00 40 40 08  38d+22:44:19.066  READ DMA   
   
Error 721 occurred at disk power-on lifetime: 27544 hours (1147 days + 16 hours)   
  When the command that caused the error occurred, the device was active or idle.   
   
  After command completion occurred, registers were:   
  ER ST SC SN CL CH DH   
  -- -- -- -- -- -- --   
  40 51 01 80 00 40 40  Error: UNC 1 sectors at LBA = 0x00400080 = 4194432   
   
  Commands leading to the command that caused the error were:   
  CR FR SC SN CL CH DH DC  Powered_Up_Time  Command/Feature_Name   
  -- -- -- -- -- -- -- --  ----------------  --------------------   
  c8 00 01 80 00 40 40 08  38d+22:44:19.066  READ DMA   
   
SMART Self-test log structure revision number 1   
Num  Test_Description  Status  Remaining  LifeTime(hours)  LBA_of_first_error   
# 1  Short offline  Completed: read failure  90%  27333  4183048   
# 2  Extended offline  Completed: read failure  90%  27190  4183050   
# 3  Short offline  Completed: read failure  90%  27093  4183052   
# 4  Short offline  Completed: read failure  90%  27021  4183054   
# 5  Short offline  Completed: read failure  90%  26925  4183048   
# 6  Short offline  Completed: read failure  90%  26591  4183050   
# 7  Extended offline  Completed: read failure  90%  26448  4183052   
# 8  Short offline  Completed: read failure  90%  26423  4183054   
# 9  Short offline  Completed: read failure  90%  26351  4183048   
#10  Short offline  Completed: read failure  90%  26255  4183050   
#11  Short offline  Completed: read failure  90%  25919  4183052   
#12  Extended offline  Completed: read failure  90%  25776  4183054   
#13  Short offline  Completed: read failure  90%  25679  4183184   
#14  Short offline  Completed: read failure  90%  25607  4185779   
#15  Short offline  Completed: read failure  90%  25512  4185780   
#16  Short offline  Completed: read failure  90%  25176  4186022   
#17  Extended offline  Completed: read failure  90%  25033  4186016   
#18  Short offline  Completed: read failure  90%  24936  4186018   
#19  Short offline  Completed: read failure  90%  24864  4186020   
#20  Short offline  Completed: read failure  90%  24768  4186022   
#21  Short offline  Completed: read failure  90%  24433  4186016

 

[Ericloewe]

We want the full output. It's not cosmetic...

In this case, though, it's obvious that ada5 is a goner.

 

[Dice]

ada3 doesn't look too happy either..
2 problematic drives on a RAIDZ2 is scary.

 

[Ericloewe]

Indeed, but it seems to be moving along for now. Should be fine with prompt replacement.

 

[Steve Beschakis]

Indeed, but it seems to be moving along for now. Should be fine with prompt replacement.

OK, sweet. Drives ordered. Last thing: when replacing two drives for this config, is it recommended to do seperate swap / rebuild operations, or just pull and replace the two in a single operation?
Thanks alot for the responsiveness and help! --cheers

 

[Ericloewe]

Replace as many drives simultaneously as you have spare SATA ports. If you have none, do it one drive at a time, since they can still contribute with something and help avoid a catastrophe.

 

[Steve Beschakis]

Replace as many drives simultaneously as you have spare SATA ports. If you have none, do it one drive at a time, since they can still contribute with something and help avoid a catastrophe.

Got it. Thanks again! Kinda wishing I'd gotten a bit more life outta these WD disks...owell. btw, here's a couple shots of the box..very fun project! Couldn't believe how easy and quick it went. l8r.

 

[nojohnny101]

What case is that?

 

[Dice]

Cool case.
But ...ehrmf, did you replace ALL drives?!
Did you burn-in the new one's?

 

[Steve Beschakis]

Cool case.
But ...ehrmf, did you replace ALL drives?!
Did you burn-in the new one's?

The case is a smaller Lian Li....don't remember the model exactly, but they make a huge range of aluminum, tool-less boxes. That pic is from when I built the thing two years ago. I just slapped the drives in, then followed the FreeNAS cookbook. No separate RAID controller. I'm sort of a hardware n00b, having only built a few machines for home use. I prolly skipped a few steps that a really thorough builder would have taken...dunno. But the thing works great, which is testimony to the gorilla-proof nature of the FreeNAS setup. I SSH into the box daily from the office, pushing screen scrapes via x-forwading whenever I need the admin UI. Nice to always have remote access to my file archive.
Kinda wish the the app would have flagged ada5 and mailed me, instead of committing to a 10-day repair--it was only the extreme file xfer latency that tipped me off to a problem. Going forward, I'll stay on top of testing a little better. I've scripted a better scheme of drive problem detection on my main system, but got lazy on the NAS box.
Anyway, just wanted to say thanks for the help. Just buttoned up the case, and things are looking good...

Code:

state: DEGRADED
status: One or more devices is currently being resilvered.
The pool will continue to function, possibly in a degraded state.action: Wait for the resilver to complete.
scan: resilver in progress since Sat Apr 22 11:47:39 2017 41.9G scanned out of 5.90T at 251M/s, 6h48m to go
6.97G resilvered, 0.69% done

 

[Dice]

Kinda wish the the app would have flagged ada5 and mailed me

Have you set up SMART email, SMART and scrub schedules?

 

[Steve Beschakis]

Have you set up SMART email, SMART and scrub schedules?

Yep. The box mails me for scheduled scrubs. Hm...actually, lemme go back in and poke around, because even though SMART is enabled, there may be more alerting options I'm not using. thanks.

BTW: here's a bit of weirdness. After resilvering completed for ada5, all was not well. For some reason, the system was reporting that ada4 had been removed by the admin--odd, since I never touched it. Shut the system down, popped the case, reseated SATA / power cables, brought it back up....DING! All good. Something musta got jostled. heh.
Anyway, I'll prolly replace ada3 tomorrow, but for now, it's nice to have a zippy zpool again! Oh...BTW #2: although I have a pair of WD Red NAS on order (coudn't find them from local brick 'n' mortar), I got impatient to revive my pool, so the drives I'm rebuilding with today are Seagate (same speed / capacity). Happy to see them playing nice together with the older WD!
--cheers

 

[Dice]

Out of curiosity, could you post the output of the new segate drive:

Code:

smartctrl -a /dev/adaX

 

[Steve Beschakis]

Out of curiosity, could you post the output of the new segate drive:

Code:

smartctrl -a /dev/adaX

Sure, np. BTW, did some perf tests, and I'm getting large-file xfer rates right where they outght to be for my network, with the NAS node sitting on a gigabit switch. Very happy. Haven't swapped ada3 yet...prolly this w/e. Here's the new ada5...sticks out like a sore thumb. heh...

...and xfer of an 8.5GB file:

Code:

=== START OF INFORMATION SECTION ===
Model Family:  Seagate Barracuda 7200.14 (AF)
Device Model:  ST3000DM001-1ER166
Serial Number:  Z504G2J1
LU WWN Device Id: 5 000c50 0a260fd67
Firmware Version: CC26
User Capacity:  3,000,592,982,016 bytes [3.00 TB]
Sector Sizes:  512 bytes logical, 4096 bytes physical
Rotation Rate:  7200 rpm
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:  Mon Apr 24 14:12:07 2017 PDT

==> WARNING: A firmware update for this drive may be available,
see the following Seagate web pages:
http://knowledge.seagate.com/articles/en_US/FAQ/207931en
http://knowledge.seagate.com/articles/en_US/FAQ/223651en

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:  (  89) 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:  (  1) minutes.
Extended self-test routine
recommended polling time:  ( 314) minutes.
Conveyance self-test routine
recommended polling time:  (  2) minutes.
SCT capabilities:  (0x1085) 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  100  100  006  Pre-fail  Always  -  2959960
  3 Spin_Up_Time  0x0003  098  098  000  Pre-fail  Always  -  0
  4 Start_Stop_Count  0x0032  100  100  020  Old_age  Always  -  3
  5 Reallocated_Sector_Ct  0x0033  100  100  010  Pre-fail  Always  -  0
  7 Seek_Error_Rate  0x000f  062  060  030  Pre-fail  Always  -  1695543
  9 Power_On_Hours  0x0032  100  100  000  Old_age  Always  -  50
10 Spin_Retry_Count  0x0013  100  100  097  Pre-fail  Always  -  0
12 Power_Cycle_Count  0x0032  100  100  020  Old_age  Always  -  3
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  099  099  000  Old_age  Always  -  1
190 Airflow_Temperature_Cel 0x0022  072  068  045  Old_age  Always  -  28 (Min/Max 26/31)
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  -  1
193 Load_Cycle_Count  0x0032  100  100  000  Old_age  Always  -  4
194 Temperature_Celsius  0x0022  028  040  000  Old_age  Always  -  28 (0 22 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  -  50h+19m+01.232s
241 Total_LBAs_Written  0x0000  100  253  000  Old_age  Offline  -  2137165332
242 Total_LBAs_Read  0x0000  100  253  000  Old_age  Offline  -  742869

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.