external hard drive not showing up in disk management

On a Linux server, when the partition planning of an existing hard disk does not meet the requirements (eg: too little space left on the root partition to continue installing a new System program), the partitions on the hard disk need to be redesigned and adjusted, and sometimes new

primary partition is exhausted, you can use the extended partition to add additional partitions, which has been described earlier, but in the Linux kernel:· The IDE's hard disk can support up to 16 partitions;· SCSI HDD supports up to 15 partitions;2. The advantages of hard disk partitioning are:(1) from the control c

Memory and third-party external storage disk management provided by android, androidmemory /*** @ Author intbird@163.com * @ time 20140606 */package com. intbird. utils; import java. io. file; import com. yilake. store. fileHelper; import android. graphics. bitmap; import android. OS. environment; import android. util. lruCache; public class CacheManager {// Sing

(a) disk partitioning1. The hard disk is logically divided into: block--track--Magnetic column--partition;2. Partition classification: Primary partition, extended partition, logical partition3. Command:SDB---The 2nd disk of the SCSI interface, the path is/DEV/SDB/DEV/SRO----discs, like/DEV/SDA/DEV/SDB/DEV/SDB2, which w

be harmful to the system if you use this instruction under normal circumstances! Usually the use of this command is the case of the system has a great problem, so that you have to enter the Linux when booting into single-machine mode for maintenance behavior, you must use this commandIf you suspect a problem with the hard drive you just formatted, you can also use fsck to check the

Ubuntu user management (6) hard disk quota Related links: Ubuntu User Management (a) user account http://www.2cto.com/ OS /201207/143927.html?ubuntuin user management (2) Group management http://www.2cto.com/ OS /201207/143929.htm

. This has been described earlier, but in the Linux kernel:· IDE Hard Disks support up to 16 partitions;· A scsi hard disk supports up to 15 partitions;2. Benefits of multiple partitions on a hard disk:(1) control considerationsBy dividing a

User Management In Ubuntu (6) Hard Disk Quota links: User Management In Ubuntu (1) user account user management in Ubuntu (1) User Management in user account http://www.bkjia.com/ OS /201207/143927.html#tu( 2) group

In a large multi-user system, you usually need to control the hard disk size that each user can use. To manage the hard disk quota, you must install the quota and quotatool packages. Disk Quota Management in Ubuntu is disabled by

Many friends for the figure is convenient, have the bad habit of littering files, and with the expansion of hard disk capacity, large hard disk file clutter is more serious. How can we achieve both the satisfaction of a large-capacity hard

1 View current system hard disk and partition conditions (Note: SCSI 1th hard drive/DEV/SDA in Linux, 2nd hard drive/dev/sdb, and so on) 2 Initialize partition SDB to physical volume PV PVCREATE/DEV/SDB//initialization Pvdisplay//

space not in the hard disk to the/home directory. If logical volume management is used, the size of the original/home directory can be expanded without formatting the original/home directory partition. Suppose we still have 20 GB of space in Hard Disk 1. Now the system engi

Percentage of idle CPU 0.0% WA Percentage of CPU time waiting for input and output 0.0% hi Percent of CPU time consumed by hardware interrupts 0.0% si Percentage of CPU time that software interrupts consume The free command shows the use state of the memory: (Take Centos7 as an example)CPU utilization = (total-available)/available---buffer write cache, save to disk buffer and then

the file is full)-K or--kilobytes: Specifies a chunk size of 1024 bytes;-L or--local: Displays only the local file system;-M or--megabytes: Specifies a chunk size of 1048576 bytes;--no-sync: Do not perform sync instructions before obtaining disk usage information, this is a preset value;-P or--portability: use POSIX output format;--sync: Before obtaining the disk usage information, perform the sync instruc

Document directory Resize current Partition LVM disk management 1. LVM introduction... 1 Ii. Basic Terms of LVM... 2 3. Install LVM... 3 4. create and manage LVM... 4 2. Create PV .. 6 3. Create VG... 7 4. Create LV .. 9 5. lv formatting and mounting... 10I. Introduction to LVM LVM is short for logical volume manager (logical volume management), which is imp

Linux hard disk Partition and file system management File System focus: inode (index node), block (Logical block), superblock (the block at the beginning of each file system, used to store the size of the file system, empty or filled blocks and their respective totals) Physical composition of the Disk:Circular DiskMechanical Arm, with the

LVM is short for Logical Volume Manager (Logical Volume management), which is implemented by Heinz Mauelshagen on the Linux 2.4 kernel. LVM logically sets partitions of one or more hard disks, which is equivalent to a large hard disk. When the hard

LVM disk management 1. LVM introduction... 1 Ii. Basic Terms of LVM... 2 3. Install LVM... 3 4. create and manage LVM... 4 2. Create PV .. 6 3. Create VG... 7 4. Create LV .. 9 5. LV formatting and mounting... 10I. Introduction to LVM LVM is short for Logical Volume Manager (Logical Volume management), which is implemented by Heinz Mauelshagen on the Linux 2.4 ke

conservativeAnd only stop the disk after a few minutes of inactivity.Another-to-save disk energy was to has a substantial disk cache in RAM. If a needed block is inThe cache, an idle disk does not has the restarted to satisfy the read. Similarly, if a write to theDisk can is buffered in the cache, a stopped

RAID + LVM management mode frequently used by enterprises: used software: VMwareWorkstation10 system environment: [root @ localhost ~] # Cat/etc/centos-releaseCentOSLinuxrelease7.0.1406 (Core) [root @ localhost ~] # Rpm-qimdadmN The establishment of RAID + LVM management modes frequently used by enterprises: Software used: VMware Workstation 10 System environment: [Root @ localhost ~] # Cat/etc/centos-relea