how do you use memtest+

paulfrottawa

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Today I bought
G.SKILL Ripjaws X Series 16GB (2x8GB) DDR3 1600MHz CL10 Dual Channel Kit
and I think its faulty. I install memtest86+ but the port explains to interupt the boot process and enter commands like.
Code:
N: ad(M,a)/boot/opt/memtest86+
Code:
unload
load /boot/opt/memtest86+
boot
How do I interrupt the boot process or drop into a mode to enter these command?
 

Beastie

Daemon

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The same way as for kernels/modules.

loader(8):
At this point, if an autoboot has not been tried, and if autoboot_delay is not set to "NO" (not case sensitive), then an autoboot will be tried.
If the system gets past this point, prompt will be set and loader will engage interactive mode.Please note that historically even when autoboot_delay is set to "0" user will be able to interrupt autoboot process by pressing some key on the console while kernel and modules are being loaded.

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-introduction.html#boot-loader:
Finally, by default, loader issues a 10 second wait for key presses, and boots the kernel if it is not interrupted. If interrupted, the user is presented with a prompt which understands the command set, where the user may adjust variables, unload all modules, load modules, and then finally boot or reboot.
 
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paulfrottawa

paulfrottawa

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Thanks I never notice that delay before.
___________________________________________________
Now I have two drives and I'm guessing how to enter them here.

Code:
0:ad(1,a)/boot/opt/memtest86+
but that just changed the end of the command to a foward slash

Code:
This port has installed ELF image of memtest86+ to
/boot/opt/memtest86+.  You can load it from from boot prompt by
interrupting boot process and entering

    N:ad(M,a)/boot/opt/memtest86+

where N and M denote proper disk and slice numbers.  See boot(8) for
details.

Alternatively you can load the image from loader prompt by escaping to
it and entering the following commands:

    unload
    load /boot/opt/memtest86+
    boot

As already advised, see loader(8) for details.
 
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paulfrottawa

paulfrottawa

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I just tried the bootable img from memtest but all it did was
Code:
read 1 from 0 to 0xdbe51340  error:0X7
and then booted FreeBSD. Don't know if that was a memory failure or a bootle flash drive error.
_______________________________________________
I think I'll return the ram because I'm comparing Virtualbox with ubuntu building chromiumOS with the new ram. And it doesn't export PATH then on another build it couldn't find python when thats not common.
 

leebrown66

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I have not had good luck with that utility. Once I had a box that would fail in different places trying to build world. I ran memtest86 for 2 days and got nothing. I ended up swapping RAM modules and compiles worked after that.

Their website has a bootable ISO you should have success with.
edit: I just noticed you said you tried that.
 

pwr2srv

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Could you boot up a Linux distribution from CD or USB? One of the boot options will probably be memtest.
 

SirDice

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Once I had a box that would fail in different places trying to build world.
This is my typical litmus test, building world is quite a heavy load, for your CPUs, for its memory and for its I/O. If it passes this I'm fairly certain the hardware is good :)
 
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