84 lines
3.2 KiB
Plaintext
84 lines
3.2 KiB
Plaintext
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Install memtest86+ into your grub menu by the following command:
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# memtest-setup
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If you use GRUB 2 (the default) it will install 20_memtest86+ GRUB template
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into /etc/grub.d and you will also need to regenerate GRUB 2 config by running:
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# grub2-mkconfig -o /boot/grub2/grub.cfg
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This is not done automatically because it could overwrite any custom changes
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in /boot/grub2/grub.cfg.
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By default ELF version of memtest86+ is installed, which should work on most of
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the systems. In case it doesn't work for you, you can try to install the non-ELF
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version by running:
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# memtest-setup -b
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Or with GRUB 2 you can switch between ELF and non-ELF versions of memtest86+
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by using INSTALL_ELF variable from /etc/memtest86+.conf. Setting it to '1'
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will instruct GRUB 2 to install ELF version of memtest86+ and setting it
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to '0' will instruct GRUB2 to install non-ELF version. If the variable
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is empty or unset, the ELF version is installed (it's due to backward
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compatibility). For the change to take effect you need to regenerate your
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GRUB 2 config by running:
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# grub2-mkconfig -o /boot/grub2/grub.cfg
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The non-ELF version is known to cause various problems and it may not work on
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several systems. That's why the ELF version is installed by default.
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In case of problems you can also try to install the non-ELF version of
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memtest86+ on floppy disk or USB flash disk and boot the memtest86+ from it.
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The following command installs the memtest86+ on floppy disk
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(WARNING: all data previosly stored on the disk will be lost):
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# dd if=/boot/memtest86+-VERSION of=/dev/fd0
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For USB flash disk the command is the same, just change the 'of' device
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appropriately (usually USB flash disk is /dev/sdb, but double check that
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the device string matches your USB flash disk before you run the command,
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wrong device string may cause significat harm, e.g. it can destroy content
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of your system or data disks).
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The memtest86+ now supports some command line parameters:
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console= - serial console can be used for memtest86+ control/display,
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example of usage:
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console=ttyS0
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console=ttyS0,115200
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console=ttyS1,115200n8
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Only ttyS0 and ttyS1 are supported.
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btrace - enable boot trace.
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maxcpus= - limit number of CPUs to use.
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onepass - run one pass and exit if there are no errors.
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tstlist= - setup a list of tests to run.
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cpumask= - set a CPU (hexadecimal) mask to select CPU's to use for testing.
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You can add memtest86+ command line parameters into grub like you are
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used with kernel command line parameters, e.g.:
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kernel /memtest86+-VERSION console=ttyS0
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Unfortunately this is currently supported only with non-ELF memtest86+ image.
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You cannot use the command line parameters with the ELF image, because the
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command line handling is currently not supported by grub for ELF images.
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If you need to use serial console with ELF image, you need to recompile
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memtest86+ and explicitly enable/configure serial line. In such case
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edit the config.h in memtest86+ sources the following way:
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#define SERIAL_CONSOLE_DEFAULT 1
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#define SERIAL_TTY 0
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#define SERIAL_BAUD_RATE 9600
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and recompile memtest86+. This will explicitly enable serial console and
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set it to use ttyS0,9600.
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NOTE: explicitly enabled serial console may significantly slow down the memory
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testing.
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