Storage Management Concept
• A file system is an organized structure of data-holding files
and directories residing on a storage device, such as a
physical disk or partition. The process of adding a new file
system to the existing directory tree is called mounting.
The directory where the new file system is mounted is referred
to as a mount point. Hard disks and storage devices are
normally divided up into smaller chunks called partitions.
Mount point & File System
• A file system is an organized structure of data-holding files
and directories residing on a storage device, such as a
physical disk or partition. The process of adding a new file
system to the existing directory tree is called mounting. The
directory where the new file system is mounted is referred
to as a mount point. Hard disks and storage devices are
normally divided up into smaller chunks called partitions.
• Partition can be assigning same file system or different file
system; it depends on partition purpose. Storage devices
are represented by a special file type called block device.
The block device is stored in the /dev directory. In Red Hat
Enterprise Linux, the first SCSI, SATA, or USB hard drive
detected is /dev/sda, the second is /dev/sdb, and so on.
• The first partition on /dev/sdais /dev/sda1, the second
partition is /dev/sda2, and so on.
• Partition can be assigning same file system or different file
system; it depends on partition purpose. Storage devices
are represented by a special file type called block device.
The block device is stored in the /devdirectory.
• In Red Hat Enterprise Linux, the first SCSI, SATA, or USB
hard drive detected is /dev/sda, the second is /dev/sdb, and
so on. The first partition on /dev/sdais /dev/sda1, the second
partition is /dev/sda2, and so on.
Logical Volume
• You can manage your disk partition with LVM (Logical
Volume management) concept. LVM has special feature
that you resize the existing partition.
• One or more block devices can be aggregated into a
storage pool called a volume group. Disk space is made
available with one or more logical volumes.
Examining File System
• To get an overview about the file system, mount points and
the amount of free space available you can use df and du
command. df command will give you total disk space, used
disk space and free disk space. du command is used for get
more details information about space used. df and du can
be used by –h or –H to get the output in human readable
format.
Mounting File System
• The Linux mount command is used to mount USBs, DVDs,
SD cards, partition and other types of storage devices on a
computer running the Linux operating system. The mount
command allows the root user to manually mount a file
system. The first argument of the mount command specifies
the file system to mount. The second argument specifies
the target directory where the file system is made available
after mounting it.
• Automatically Mounting of Removal Devices.
o If you are logged in Graphical Desktop Environment, it will
automatically mount the removal devices.
The removal storage devices is mounted at
/run/media/UserName/Label.
o Before removing the device, you should unmount the
device.
• Unmounting File System
o The shutdown and reboot procedures unmount all file
system automatically.
o Unmounting is not possible if mounted file system is in use.
o The # lsof command lists all open files.
# umount /mnt
used disk space and free disk space.
Searching files
• A system administrator needs tools to search file with
certain criteria.
• In Linux there is several methods of searching or finding
files and directory.
• The “locate” and “find” command as well ls command we
can used for locating a files or directory. “updated”
command will update the database of locate manually. By
default, database update automatically everyday.
• In Linux there is several methods of searching or finding
files and directory.
• The “locate” and “find” command as well ls command we
can used for locating a files or directory. “updated”
command will update the database of locate manually.
By default, database update automatically every day. The locate
command searches a pre-generated database for file
names or file paths and returns the results immediately.
• Locate Command
o “updatedb” command will update the database of locate
manually. By default, database update automatically every
day.
o The locate command searches a pre-generated database
for file names or file paths and returns the res
Comments
Post a Comment