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Full Discussion: Pvcreate can't open /dev/xvda2 exclusively mounted filesystem
Operating Systems Linux Red Hat Pvcreate can't open /dev/xvda2 exclusively mounted filesystem Post 302973036 by alnhk on Friday 13th of May 2016 05:22:24 AM
Old 05-13-2016
[root@localhost ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 126G 0 disk
\u251c\u2500xvda1 202:1 0 102M 0 part /boot
\u251c\u2500xvda2 202:2 0 16G 0 part /
\u2514\u2500xvda3 202:3 0 109.9G 0 part
[root@localhost ~]#



[root@localhost ~]# cat /proc/partitions
major minor #blocks name

202 0 132120576 xvda
202 1 104448 xvda1
202 2 16778240 xvda2
202 3 115236864 xvda3
[root@localhost ~]#


[root@localhost ~]# fdisk -l

Disk /dev/xvda: 135.3 GB, 135291469824 bytes
64 heads, 32 sectors/track, 129024 cylinders
Units = cylinders of 2048 * 512 = 1048576 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000b91c5

Device Boot Start End Blocks Id System
/dev/xvda1 * 2 103 104448 83 Linux
/dev/xvda2 104 16488 16778240 8e Linux LVM
/dev/xvda3 16489 129024 115236864 8e Linux LVM
[root@localhost ~]#




[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/xvda2 16G 5.3G 9.8G 36% /
tmpfs 1.4G 0 1.4G 0% /dev/shm
/dev/xvda1 99M 72M 23M 77% /boot
[root@localhost ~]#



[root@localhost ~]# mount
/dev/xvda2 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/xvda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
[root@localhost ~]#


[root@localhost ~]# pvs
[root@localhost ~]#
 

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LEARN ABOUT SUNOS

port

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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