Trying to unmount umount a drive then mount the drive as a backup
Posted: 2018/03/19 14:55:23
I guess this could go in either hardware or software. I am not sure what I am doing incorrectly. Any pointers would be a big help.
Trying to unmount (umount) a drive then mount the drive as a backup drive I keep getting errors busy or not mounted Not sure what I am missing. I am just trying to add a backup drive - ( how would I break apart these drives the correct way?) Overall goal take one drive and rename and save it as backup and mount a backup folder.
using centos 7.4 fresh install
Ran this - (sorry for the longest I am sure there is a simple answer behind all this)
things I ran -
fdisk - l
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00007079
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 3907028991 1952464896 8e Linux LVM
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0002f994
Device Boot Start End Blocks Id System
/dev/sdb1 2048 3907028991 1953513472 8e Linux LVM
Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0003d7a4
Device Boot Start End Blocks Id System
/dev/sdc1 2048 3907028991 1953513472 8e Linux LVM
Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 6174 MB, 6174015488 bytes, 12058624 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-home: 5940.2 GB, 5940241760256 bytes, 11602034688 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
then this -
[root@localhost /]# umount /dev/sdc1
umount: /dev/sdc1: not mounted
[root@localhost /]# mount -t ext4 /dev/sdc1 /backup
mount: /dev/sdc1 is already mounted or /backup busy
and this -
[root@localhost /]# sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <1.82t 4.00m
/dev/sdb1 centos lvm2 a-- <1.82t 0
/dev/sdc1 centos lvm2 a-- <1.82t 0
[root@localhost /]# sudo lvdisplay /dev/centos
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 79NHbt-FJLu-e72U-vStR-SOTS-o2sY-mVIOAA
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 2
LV Size 5.75 GiB
Current LE 1472
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/home
LV Name home
VG Name centos
LV UUID OLHRG7-5dit-yQeF-bHCw-dzyP-m8lU-ehK4y8
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 1
LV Size 5.40 TiB
Current LE 1416264
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID 7pcE7P-nS8y-MJpe-Mmbx-QPXA-pe79-T65sOP
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:28 -0400
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
[root@localhost /]# cat /proc/mounts
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,seclabel,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
devtmpfs /dev devtmpfs rw,seclabel,nosuid,size=5895308k,nr_inodes=1473827,mode=755 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,seclabel,nosuid,nodev 0 0
devpts /dev/pts devpts rw,seclabel,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,seclabel,nosuid,nodev,mode=755 0 0
tmpfs /sys/fs/cgroup tmpfs ro,seclabel,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpuacct,cpu 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_prio,net_cls 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
/dev/mapper/centos-root / xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=12455 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,seclabel,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
mqueue /dev/mqueue mqueue rw,seclabel,relatime 0 0
/dev/mapper/centos-home /home xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
/dev/sda1 /boot xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
tmpfs /run/user/0 tmpfs rw,seclabel,nosuid,nodev,relatime,size=1188108k,mode=700 0 0
[root@localhost /]# mount -t ext4 /dev/sdc1 /backup
mount: /dev/sdc1 is already mounted or /backup busy
[root@localhost /]# mount /dev/sdc1 /backup
mount: unknown filesystem type 'LVM2_member'
[root@localhost /]# lvscan
ACTIVE '/dev/centos/swap' [5.75 GiB] inherit
ACTIVE '/dev/centos/home' [5.40 TiB] inherit
ACTIVE '/dev/centos/root' [50.00 GiB] inherit
[root@localhost /]# lvmdiskscan
/dev/centos/root [ 50.00 GiB]
/dev/sda1 [ 1.00 GiB]
/dev/centos/swap [ 5.75 GiB]
/dev/sda2 [ <1.82 TiB] LVM physical volume
/dev/centos/home [ 5.40 TiB]
/dev/sdb1 [ <1.82 TiB] LVM physical volume
/dev/sdc1 [ <1.82 TiB] LVM physical volume
3 disks
1 partition
0 LVM physical volume whole disks
3 LVM physical volumes
[root@localhost /]# lvdisplay
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 79NHbt-FJLu-e72U-vStR-SOTS-o2sY-mVIOAA
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 2
LV Size 5.75 GiB
Current LE 1472
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/home
LV Name home
VG Name centos
LV UUID OLHRG7-5dit-yQeF-bHCw-dzyP-m8lU-ehK4y8
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 1
LV Size 5.40 TiB
Current LE 1416264
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID 7pcE7P-nS8y-MJpe-Mmbx-QPXA-pe79-T65sOP
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:28 -0400
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
[root@localhost /]#
, or
Trying to unmount (umount) a drive then mount the drive as a backup drive I keep getting errors busy or not mounted Not sure what I am missing. I am just trying to add a backup drive - ( how would I break apart these drives the correct way?) Overall goal take one drive and rename and save it as backup and mount a backup folder.
using centos 7.4 fresh install
Ran this - (sorry for the longest I am sure there is a simple answer behind all this)
things I ran -
fdisk - l
Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00007079
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 3907028991 1952464896 8e Linux LVM
Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0002f994
Device Boot Start End Blocks Id System
/dev/sdb1 2048 3907028991 1953513472 8e Linux LVM
Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0003d7a4
Device Boot Start End Blocks Id System
/dev/sdc1 2048 3907028991 1953513472 8e Linux LVM
Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 6174 MB, 6174015488 bytes, 12058624 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-home: 5940.2 GB, 5940241760256 bytes, 11602034688 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
then this -
[root@localhost /]# umount /dev/sdc1
umount: /dev/sdc1: not mounted
[root@localhost /]# mount -t ext4 /dev/sdc1 /backup
mount: /dev/sdc1 is already mounted or /backup busy
and this -
[root@localhost /]# sudo pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <1.82t 4.00m
/dev/sdb1 centos lvm2 a-- <1.82t 0
/dev/sdc1 centos lvm2 a-- <1.82t 0
[root@localhost /]# sudo lvdisplay /dev/centos
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 79NHbt-FJLu-e72U-vStR-SOTS-o2sY-mVIOAA
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 2
LV Size 5.75 GiB
Current LE 1472
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/home
LV Name home
VG Name centos
LV UUID OLHRG7-5dit-yQeF-bHCw-dzyP-m8lU-ehK4y8
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 1
LV Size 5.40 TiB
Current LE 1416264
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID 7pcE7P-nS8y-MJpe-Mmbx-QPXA-pe79-T65sOP
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:28 -0400
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
[root@localhost /]# cat /proc/mounts
rootfs / rootfs rw 0 0
sysfs /sys sysfs rw,seclabel,nosuid,nodev,noexec,relatime 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
devtmpfs /dev devtmpfs rw,seclabel,nosuid,size=5895308k,nr_inodes=1473827,mode=755 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
tmpfs /dev/shm tmpfs rw,seclabel,nosuid,nodev 0 0
devpts /dev/pts devpts rw,seclabel,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
tmpfs /run tmpfs rw,seclabel,nosuid,nodev,mode=755 0 0
tmpfs /sys/fs/cgroup tmpfs ro,seclabel,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpuacct,cpu 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_prio,net_cls 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
configfs /sys/kernel/config configfs rw,relatime 0 0
/dev/mapper/centos-root / xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
systemd-1 /proc/sys/fs/binfmt_misc autofs rw,relatime,fd=35,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=12455 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,seclabel,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
mqueue /dev/mqueue mqueue rw,seclabel,relatime 0 0
/dev/mapper/centos-home /home xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
/dev/sda1 /boot xfs rw,seclabel,relatime,attr2,inode64,noquota 0 0
tmpfs /run/user/0 tmpfs rw,seclabel,nosuid,nodev,relatime,size=1188108k,mode=700 0 0
[root@localhost /]# mount -t ext4 /dev/sdc1 /backup
mount: /dev/sdc1 is already mounted or /backup busy
[root@localhost /]# mount /dev/sdc1 /backup
mount: unknown filesystem type 'LVM2_member'
[root@localhost /]# lvscan
ACTIVE '/dev/centos/swap' [5.75 GiB] inherit
ACTIVE '/dev/centos/home' [5.40 TiB] inherit
ACTIVE '/dev/centos/root' [50.00 GiB] inherit
[root@localhost /]# lvmdiskscan
/dev/centos/root [ 50.00 GiB]
/dev/sda1 [ 1.00 GiB]
/dev/centos/swap [ 5.75 GiB]
/dev/sda2 [ <1.82 TiB] LVM physical volume
/dev/centos/home [ 5.40 TiB]
/dev/sdb1 [ <1.82 TiB] LVM physical volume
/dev/sdc1 [ <1.82 TiB] LVM physical volume
3 disks
1 partition
0 LVM physical volume whole disks
3 LVM physical volumes
[root@localhost /]# lvdisplay
--- Logical volume ---
LV Path /dev/centos/swap
LV Name swap
VG Name centos
LV UUID 79NHbt-FJLu-e72U-vStR-SOTS-o2sY-mVIOAA
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 2
LV Size 5.75 GiB
Current LE 1472
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/centos/home
LV Name home
VG Name centos
LV UUID OLHRG7-5dit-yQeF-bHCw-dzyP-m8lU-ehK4y8
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:07 -0400
LV Status available
# open 1
LV Size 5.40 TiB
Current LE 1416264
Segments 3
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/centos/root
LV Name root
VG Name centos
LV UUID 7pcE7P-nS8y-MJpe-Mmbx-QPXA-pe79-T65sOP
LV Write Access read/write
LV Creation host, time localhost, 2018-03-14 10:56:28 -0400
LV Status available
# open 1
LV Size 50.00 GiB
Current LE 12800
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
[root@localhost /]#
, or