#010 EDITOR LZ77 SCRIPT PASSWORD#

Use pvcreate to initialize the partitions for use with LVM. In this lab, your task is to create a logical volume using the first partition on each new drive as follows: You have also installed a third hard drive and created two partitions on the drive. You've installed a second hard drive and created one partition on the drive. The table below lists and describes the most common device files: A raw device is a special type of logical device that is associated with a character device file.

> Devices that send data transfers character-by-character (like a keyboard) are called character devices. The first two fields are mandatory, the remaining two are optional.

#010 EDITOR LZ77 SCRIPT PASSWORD#

Each line is in the form name encrypted-device password options. Each line describes one encrypted block device. > The /etc/crypttab file describes encrypted block devices that are set up during system boot. > The blkid command also lists the attributes of block devices including its universally unique identifier (UUID), file system type and volume label. > The lsblk command lists information about block devices including name, type (disk or partition), size, and mount point.

Devices, such as hard drives, that receive data in block transfers by using memory to buffer the transfers are called block devices. > Not only do device files represent devices, they also indicate how data is transferred to that device: > The /dev directory contains files for all types of devices, even those that don't exist on the system. > Device files are located in the /dev directory. Storage devices in Linux are represented by device files. For example, dropping a hard drive while it is spinning can cause the read/write heads to dig into the platter, destroying any data stored there. Hard disks are vulnerable to physical damage. Hard disks wear out over time because they are mechanical devices that contain moving parts. Hard disks also have several disadvantages, including the following: > The store data at a relatively low cost per megabyte. > They provide reasonably fast access speeds. Hard disks provide several advantages, including the following: > Parallel ATA (PATA) (This interface is obsolete) In a modern desktop computer system, the following storage interfaces may be used: However, it may also be implemented using an expansion card installed in an expansion slot. The interface is commonly integrated within the motherboard itself. Hard disk drives are connected to the system motherboard using a storage interface. > Sectors Per Track specifies the number of wedge-shaped areas the platters have been divided into. > Cylinders specifies the number of concentric parallel tracks on all sides of all platters in the hard disk drive. > Heads specifies to the number of read/write heads in the drive. The following parameters are used by the storage device interface to determine how the drive is accessed and where data can be stored: The faster the disk's platters spin, the faster data can be accessed.Ī hard disk drive identifies where data can be stored on its platters using several parameters that are collectively called the drive's geometry. Each platter is coated with a magnetic surface material that allows the hard disk's read/write heads to store and retrieve information to and from the drive. Hard disk drives magnetically store information using spinning aluminum disks called platters. W writes the partition table to disk (saving the file) and exits the fdisk utility.įor decades, hard disk drives have been the primary type of long-term storage used in desktop and server systems. *The /proc/partitions file contains a table with major and minor number of partitioned devices, their number of blocks, and the device name in /dev. P displays the partition table for that device Within the fdisk utility, you can run the following options: Type fdisk at the command prompt to enter the fdisk utility. > Using the -l option displays the current partition configuration on the system. > When creating a partition, you specify the partition type using a hexadecimal code.

The size is indicated using K (kilobytes), M (megabytes), G (gigabytes), or T (terabytes). > When you create a partition, fdisk requests a beginning/ending sector or size. The fdisk utility has the following characteristics: The fdisk utility is used to manage partitions on a hard disk.

010 editor lz77 script