Error - mount: /dev/sdb1 is write-protected, mounting read-only
[root@localhost ~]# fdisk -l
Disk /dev/sda: 32.2 GB, 32212254720 bytes, 62914560 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: 0x000d604e
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 62914559 30407680 8e Linux LVM
Disk /dev/sdb: 12.9 GB, 12884901888 bytes, 25165824 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/ol-root: 29.0 GB, 28982640640 bytes, 56606720 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/ol-swap: 2147 MB, 2147483648 bytes, 4194304 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
[root@localhost ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0xa412a5eb.
Command (m for help): p
Disk /dev/sdb: 12.9 GB, 12884901888 bytes, 25165824 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: 0xa412a5eb
Device Boot Start End Blocks Id System
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-25165823, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-25165823, default 25165823):
Using default value 25165823
Partition 1 of type Linux and of size 12 GiB is set
Command (m for help): p
Disk /dev/sdb: 12.9 GB, 12884901888 bytes, 25165824 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: 0xa412a5eb
Device Boot Start End Blocks Id System
/dev/sdb1 2048 25165823 12581888 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# mount /dev/sdb1 /backup/
mount: /dev/sdb1 is write-protected, mounting read-only
mount: unknown filesystem type '(null)'
[root@localhost ~]#
[root@localhost ~]# mount /dev/sdb1 /backup/
mount: /dev/sdb1 is write-protected, mounting read-only
mount: unknown filesystem type '(null)'
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# mkfs.ext4 /dev/sdb1
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
786432 inodes, 3145472 blocks
157273 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2151677952
96 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# mount /dev/sdb1 /backup/
[root@localhost ~]#
[root@localhost ~]#
[root@localhost ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 823M 0 823M 0% /dev
tmpfs 847M 0 847M 0% /dev/shm
tmpfs 847M 9.3M 838M 2% /run
tmpfs 847M 0 847M 0% /sys/fs/cgroup
/dev/mapper/ol-root 27G 27G 200M 100% /
/dev/sda1 1014M 217M 798M 22% /boot
tmpfs 170M 8.0K 170M 1% /run/user/42
tmpfs 170M 0 170M 0% /run/user/0
/dev/sdb1 12G 41M 12G 1% /backup
[root@localhost ~]#
[root@localhost ~]#
Entry in fstab
[root@localhost ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Wed Jul 29 17:46:25 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/ol-root / xfs defaults 0 0
UUID=df8f6e5c-bd9c-4782-8a03-7d4ecc10fdd4 /boot xfs defaults 0 0
/dev/mapper/ol-swap swap swap defaults 0 0
UUID=0d604fb0-3675-4e59-8bcc-2f9d8ca8d86d /backup ext4 defaults 0 0
[root@localhost ~]#
[root@localhost ~]#
