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Operating Systems Linux Red Hat Unable to create customized multipath device Post 302982206 by linux.amrit on Monday 26th of September 2016 01:00:26 PM
Old 09-26-2016
* What output/errors do you get? Nothing much error i can see...
* What OS version are you using?
Code:
# uname -a
Linux desktopA.home.org 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

* Can you not join these up with reference to the files in /dev/disk*? How to do it ?
Code:
# ls -ld /dev/dm-5 
brw-rw----. 1 root disk 253, 5 Sep 26 15:21 /dev/dm-5
# ls -ld /dev/mapper/mpatha 
lrwxrwxrwx. 1 root root 7 Sep 26 15:21 /dev/mapper/mpatha -> ../dm-3

Do you want me to mention /dev/dm-5 on multipath.conf ?


Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 09-26-2016 at 03:36 PM.. Reason: Added CODE tags.
 

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MEM(4)                                                       Linux Programmer's Manual                                                      MEM(4)

NAME
mem, kmem, port - system memory, kernel memory and system ports DESCRIPTION
/dev/mem is a character device file that is an image of the main memory of the computer. It may be used, for example, to examine (and even patch) the system. Byte addresses in /dev/mem are interpreted as physical memory addresses. References to nonexistent locations cause errors to be returned. Examining and patching is likely to lead to unexpected results when read-only or write-only bits are present. Since Linux 2.6.26, and depending on the architecture, the CONFIG_STRICT_DEVMEM kernel configuration option limits the areas which can be accessed through this file. For example: on x86, RAM access is not allowed but accessing memory-mapped PCI regions is. It is typically created by: mknod -m 660 /dev/mem c 1 1 chown root:kmem /dev/mem The file /dev/kmem is the same as /dev/mem, except that the kernel virtual memory rather than physical memory is accessed. Since Linux 2.6.26, this file is available only if the CONFIG_DEVKMEM kernel configuration option is enabled. It is typically created by: mknod -m 640 /dev/kmem c 1 2 chown root:kmem /dev/kmem /dev/port is similar to /dev/mem, but the I/O ports are accessed. It is typically created by: mknod -m 660 /dev/port c 1 4 chown root:kmem /dev/port FILES
/dev/mem /dev/kmem /dev/port SEE ALSO
chown(1), mknod(1), ioperm(2) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. Linux 2015-01-02 MEM(4)
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