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Parity Check Speed 60% of 4.7 speed

mbryanr
in General Support (V5 and Older)

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Had a strange one today.  I ran a non correcting parity-sync last night, expecting it would finish within 28000 seconds or so. My first parity sync since upgrading.

 

I've attached a syslog. No issues, no drive errors or hardware errors.

Did notice a write occurred to the array ~ 8 hours into the parity check - see attached images.

 

 

4.7- Repeatable since bulid (Nov '10) -

Line 2368: Jun  1 07:57:01 Tower kernel: md: sync done. time=28620sec rate=68256K/sec

Line 2369: Jun  1 07:57:01 Tower kernel: md: recovery thread sync completion status: 0

 

5RC5-r8168 - 42MB/s

Line 1: 2012-07-05 13:09:34 warning 192.168.1.108 kern kernel kernel: md: recovery thread sync completion status: 0

Line 2: 2012-07-05 13:09:34 warning 192.168.1.108 kern kernel kernel: md: sync done. time=47463sec

 

Any ideas?

syslog.tgz.txt

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    • Author

    CPU % and Network Transfer during parity check

    ScreenHunter_150_Jul._05_19_29.jpg.25fa3fc029f9d1c7558679b704355873.jpg

    ScreenHunter_149_Jul._05_19_29.jpg.6ba9539834cc655c8c8879ad58bc43f8.jpg

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    If you have a SAS MV8 card, might need to go down to B14. I had parity speed issues on the latest RCs with them.

  • Quote
    • Author

    No MV8 installed.

     

    Sent from my SAMSUNG-SGH-I897 using Tapatalk 2

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