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attempt to pause scrub leads to confusion

Description

Usingn FreeNAS 11.2-U7, I tried to pause a zfs scrub.

In one window:

  1. zfs scrub -p tank

5 minutes later this command has not returned:

  1. ps axl | grep zpool
    0 22167 13470 0 20 0 7804 3832 tx->tx_s T+ 0 0:00.00 zpool scrub -p tank

however zpool status says this:

scan: scrub paused since Mon Feb 3 01:54:47 2020
scrub started on Sat Feb 1 20:44:30 2020
625G scanned, 505G issued, 19.1T total
0 repaired, 2.59% done

and iostat still says the system is busy:

  1. zpool iostat tank 1
    capacity operations bandwidth
    pool alloc free read write read write

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                    • ----- ----- ----- ----- -----
                      tank 15.2T 13.8T 452 4.17K 4.39M 44.0M
                      tank 15.2T 13.8T 134 0 539K 0
                      tank 15.2T 13.8T 141 0 568K 0
                      tank 15.2T 13.8T 134 0 537K 0
                      tank 15.2T 13.8T 133 0 536K 0
                      tank 15.2T 13.8T 136 0 547K 0

  1. ps axwww | grep zpool
    22167 0 T+ 0:00.00 zpool scrub -p tank

The command is hung, system is still doing work (what I don't know) but status says paused.

Problem/Justification

None

Impact

None

SmartDraw Connector

Katalon Manual Tests (BETA)

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Joe Maloney February 19, 2020 at 3:11 PM

The final release of 11.2 was pushed yesterday, and has reached end of life.  We would recommend upgrading to 11.2-U8, and if that does not resolve your issue giving 11.3-RELEASE a try would be the next step.  If you still encounter these issues with 11.3-RELEASE we would be happy to assign over to an engineer to see if anything can be done.  

Darren Reed February 2, 2020 at 3:05 PM

It finally came back but took ages however iostat still says the pool is working away, doing what I do not know.

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Katalon Platform

Created February 2, 2020 at 3:02 PM
Updated July 1, 2022 at 4:45 PM
Resolved February 19, 2020 at 3:11 PM
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