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Groups > comp.sys.mac.hardware.misc > #170

Memory lock failed

From Francois <xanrov@numericable.fr>
Newsgroups comp.sys.mac.hardware.misc
Subject Memory lock failed
Date 2011-08-19 22:10 +0200
Message-ID <9b7u9sFgmsU1@mid.individual.net> (permalink)

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I had recently memory problems on my Mac Pro (early 2008), and I had to 
replace some 4GB DIMM's to recover my original 24 GB RAM. This Ram 
consists now of 4 slots with 2GB ( risers A & B) and 4 with 4GB ( also 
half on A , half on B). The makers are Crucial (2x4 GB) and "elixir" for 
the rest. Of course I ran memtest  ( in single user mode ) after each 
memory change ( there were several). Now ,every time, memtest log said :
        "Attempted memory lock... ERROR Memory lock failed - reason unknown
WARNING : Testing with unlocked memory may be slower and less reliable"

The 3 test sequence was every time successful, and the computer behaves 
normally.
Anyway I'm baffled : why is my memory not "lockable" ?
Has this something to see with the placement of the memory sticks on the 
risers ?
Thanks for any hint, although that doesn't prevent me to sleep.

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Thread

Memory lock failed Francois <xanrov@numericable.fr> - 2011-08-19 22:10 +0200
  Re: Memory lock failed philo <philo@invalid.not> - 2011-08-20 07:45 -0500
    Re: Memory lock failed Francois <danzas@9online.fr> - 2011-08-20 17:08 +0200
      Re: Memory lock failed philo <philo@invalid.not> - 2011-08-20 16:11 -0500
    Re: Memory lock failed Howard Brazee <howard@brazee.net> - 2011-08-20 18:06 -0600
      Re: Memory lock failed Tom Stiller <tom_stiller@yahoo.com> - 2011-08-20 21:04 -0400
        Re: Memory lock failed Howard Brazee <howard@brazee.net> - 2011-08-21 16:10 -0600
          Re: Memory lock failed Tom Stiller <tom_stiller@yahoo.com> - 2011-08-21 19:04 -0400
    Re: Memory lock failed dempson@actrix.gen.nz (David Empson) - 2011-08-21 12:56 +1200
      Re: Memory lock failed philo <philo@invalid.not> - 2011-08-20 21:37 -0500
        Re: Memory lock failed dempson@actrix.gen.nz (David Empson) - 2011-08-21 17:17 +1200
          Re: Memory lock failed nmassello@yahoo.com (Neill Massello) - 2011-08-21 02:32 -0600
            Re: Memory lock failed dempson@actrix.gen.nz (David Empson) - 2011-08-22 00:38 +1200
              Re: Memory lock failed Tom Stiller <tom_stiller@yahoo.com> - 2011-08-21 09:18 -0400
                Re: Memory lock failed dempson@actrix.gen.nz (David Empson) - 2011-08-22 01:34 +1200
          Re: Memory lock failed philo <philo@invalid.not> - 2011-08-21 07:15 -0500
            Re: Memory lock failed dempson@actrix.gen.nz (David Empson) - 2011-08-22 01:04 +1200
              Re: Memory lock failed philo <philo@invalid.not> - 2011-08-21 08:27 -0500
  Re: Memory lock failed Jolly Roger <jollyroger@pobox.com> - 2011-08-20 15:13 +0000
    Re: Memory lock failed Francois <danzas@9online.fr> - 2011-08-21 10:14 +0200

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