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Unusual hard drive activity.

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Tumbleweeds
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Unusual hard drive activity.

Post by Tumbleweeds »

About 10 days ago I added a third mirror vdev to my pool. One hd was formated with ext3 and the other had been cleaned up with dd.

The clean hd would not show up on NAS4Free, so I added the vdev to the pool using

Code: Select all

zpool add tank mirror ada4 ada5

Everything looks normal and I don't see any log entries with errors

Code: Select all

  pool: tank
 state: ONLINE
  scan: scrub repaired 0 in 7h20m with 0 errors on Sun May 14 22:28:56 2017
config:

	NAME        STATE     READ WRITE CKSUM
	tank        ONLINE       0     0     0
	  mirror-0  ONLINE       0     0     0
	    ada0    ONLINE       0     0     0
	    ada1    ONLINE       0     0     0
	  mirror-1  ONLINE       0     0     0
	    ada2    ONLINE       0     0     0
	    ada3    ONLINE       0     0     0
	  mirror-2  ONLINE       0     0     0
	    ada4    ONLINE       0     0     0
	    ada5    ONLINE       0     0     0

errors: No known data errors

               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
tank        3.08T  1022G     36     25  4.07M   702K
  mirror    1.50T   324G     17      8  1.94M   227K
    ada0        -      -     15      5  1.86M   229K
    ada1        -      -     15      5  1.86M   229K
  mirror    1.48T   340G     17      8  1.92M   207K
    ada2        -      -     15      5  1.84M   209K
    ada3        -      -     15      5  1.84M   209K
  mirror     105G   359G      2      9   244K   295K
    ada4        -      -      1      5   188K   297K
    ada5        -      -      1      5   188K   297K
----------  -----  -----  -----  -----  -----  -----

But the hd that was clean has been showing very different I/O statistics ever since it was added

Code: Select all

Status & Information
Device 	Size 		Device Model 		Description 			Serial Number 	Filesystem 		I/O Statistics 			Temperature 	Status
ada0	2.00TB		WDC WD20EFRX-68EUZN0	Western Digital Red		WD-WCC4M7HT70CJ	ZFS Storage Pool	96.75 KiB/t, 22 tps, 2.08 MiB/s		35 °C	ONLINE
ada1	2.00TB		WDC WD20EFRX-68EUZN0	Western Digital Red		WD-WCC4M0VYLU3S	ZFS Storage Pool	97.35 KiB/t, 22 tps, 2.09 MiB/s		36 °C	ONLINE
ada2	2.00TB		WDC WD20EFRX-68EUZN0	Western Digital Red		WD-WCC4M0101651	ZFS Storage Pool	96.68 KiB/t, 22 tps, 2.04 MiB/s		35 °C	ONLINE
ada3	2.00TB		WDC WD20EFRX-68EUZN0	Western Digital Red		WD-WCC4M0088019	ZFS Storage Pool	97.13 KiB/t, 22 tps, 2.04 MiB/s		40 °C	ONLINE
ada4	500.11GB	ST500DM002-1BD142	Seagate Barracuda 7200.14 (AF)	W2AM5VXE	ZFS Storage Pool	0.89 KiB/t, 1115 tps, 0.97 MiB/s	43 °C	ONLINE
ada5	500.11GB	ST500DM002-1BD142	Seagate Barracuda 7200.14 (AF)	W2AM5HWC	ZFS Storage Pool	62.76 KiB/t, 7 tps, 0.43 MiB/s		44 °C	ONLINE
Any idea of what is going on?

Thanks in advance!
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