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Re: Intel 82576 Gigabit on Debian 7 slow speed.

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On 12/20/2015 08:36 AM, Mimiko wrote:
> zpool create -f -m none -o ashift=12 zfspool raidz2
> wwn-0x50000xxxxxxxxxxx ..... (all disks).

On 12/21/2015 11:20 PM, Mimiko wrote:
 > One channel is connected to 8 x 2TB the other channel to 8 x 1TB.
...
 > zfs list
 > NAME                   USED  AVAIL  REFER  MOUNTPOINT
 > zfspool               11.5T  39.7G   335K  none

RTFM zpool:

     http://linux.die.net/man/8/zpool

     Virtual Devices (vdevs)
     ...
     raidz
     ...
         A raidz group can have single-, double- , or triple parity,
         meaning that the raidz group can sustain one, two, or three
         failures, respectively, without losing any data. ... [The]
         raidz2 vdev type specifies a double-parity raidz group;
         ...
         A raidz group with N disks of size X with P parity disks can
         hold approximately (N-P)*X bytes and can withstand P device(s)
         failing before data integrity is compromised. The minimum
         number of devices in a raidz group is one more than the number
         of parity disks. The recommended number is between 3 and 9 to
         help increase performance.


Doing the math for your 'zpool create' invocation:

     N = 16	(total number of drives)
     X = 1 TB	(size of smallest drive)
     P = 2	(raidz2)

     size = (16 - 2) * 1 TB = 14 TB


But your 'zfs list' implies a pool size of 12 TB.  I don't understand...


RTFM RAID card:

     http://www.supermicro.com.tr/AOC-USASLP-L8i.pdf

     Chapter 2 Connectors, Jumpers and Indicators
     ...
     2-1     Front Connectors and Pin Definitions
     ...
     Internal SAS Connectors
     ...
     Use a single port SAS "ipass" cable (SuperMicro order number
     CBL-0108L-02)


Are you using Supermicro cable CBL-0108L-02?

     http://www.supermicro.com/support/resources/sas/


Are you using Supermicro chassis 836E2-R800V or 836E2-R800B?

     http://www.supermicro.com/products/chassis/3U/836/SC836E2-R800.cfm


David

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Thread

Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-18 12:40 +0100
  Re: Intel 82576 Gigabit on Debian 7 slow speed. Michael Beck <eliteknipser@gmail.com> - 2015-12-18 15:40 +0100
    Re: Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-18 18:50 +0100
      Re: Intel 82576 Gigabit on Debian 7 slow speed. Dan Ritter <dsr@randomstring.org> - 2015-12-18 23:50 +0100
        Re: Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-19 16:50 +0100
          Re: Intel 82576 Gigabit on Debian 7 slow speed. Sven Hartge <sven@svenhartge.de> - 2015-12-19 17:30 +0100
            Re: Intel 82576 Gigabit on Debian 7 slow speed. Frank Pikelner <frank.pikelner@gmail.com> - 2015-12-20 01:40 +0100
          Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-20 04:30 +0100
            Re: Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-20 17:40 +0100
              Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-21 09:00 +0100
                Re: Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-22 08:30 +0100
                Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-22 11:00 +0100
              Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-22 23:00 +0100
            Re: Intel 82576 Gigabit on Debian 7 slow speed. Mimiko <vbvbrj@gmail.com> - 2015-12-20 18:20 +0100
              Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-21 09:30 +0100
                Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-21 10:00 +0100
      Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-19 06:20 +0100
  Re: Intel 82576 Gigabit on Debian 7 slow speed. David Christensen <dpchrist@holgerdanske.com> - 2015-12-19 03:20 +0100

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