nas raid5

Take RAID5 as an example:1. Add 4 disksRequirements: capacity, speed, interface of the same hard drive.2. Create a partition and modify the ID[Email protected] ~]# Fdisk/dev/sdb[Email protected] ~]# FDISK/DEV/SDC[Email protected] ~]# FDISK/DEV/SDD[Email protected] ~]# FDISK/DEV/SDENote: The modification ID is FD (RAID supported)Device Boot Start End Blocks Id System/DEV/SDB1 1 652 5237245+ fd Linux Raid AutoDetect/DEV/SDC1 1 652 4563889+ fd Linux Raid

EssayYesterday the leader let me to a server to do the system, itself as development I have some challenges. And what the leader says, how do you try to do it?In the afternoon to the computer room to find the server was just to install a system to finish, and I understand the server itself has a system, thought to take the system disk put into the dual-machine installation is, the leader said to do raid, asked me to do which version, fortunately I checked the information on the system in the mor

A RAID definitionRAID (Redundant array of independent disk independent Redundant array) technology was proposed by the University of California, Berkeley, in 1987, initially to combine small, inexpensive disks in place of large expensive disks, while hoping that the disk will fail without damaging access to the data Development of a certain level of data protection technology. RAID is a redundant array of inexpensive disks that appear as a separate, large storage device under the operating syste

A RAID definitionRAID (Redundant array of independent disk independent Redundant array) technology was proposed by the University of California, Berkeley, in 1987, initially to combine small, inexpensive disks in place of large expensive disks, while hoping that the disk will fail without damaging access to the data Development of a certain level of data protection technology. RAID is a redundant array of inexpensive disks that appear as a separate, large storage device under the operating syste

@ centos/] # mdadm-D/dev/md0 4. Start and Stop Umount is required before stopping, and then mdadm-S/dev/md0 Start: [root @ centos/] # mdadm-A/dev/md0/dev/sda1/dev/sdb1/dev/sdc1/dev/sdd1 If a configuration file has been created, run the command mdadm-As/dev/md0 5. About the configuration file The system contains a configuration file sample/usr/share/doc/mdadm-1.6.0/mdadm. conf-example, refer to create/dev/mdadm. conf configuration file. You can also run the command mdadm-Ds to view the det

1. Add 5 SATA virtual hard disks in the virtual machine, each 20G, three data disk, a check disk, a spare disk. Restart the virtual machine when you are finished adding it.2. View system disk Informationsudo fdisk-l3. Create a partition for the added virtual hard disksudo fdisk/dev/sd[d-f]Follow the instructions, N: Create a new partition, p: Create primary partition, p: View partition settings, W: Save Changes (others are configured by default)4. Create a soft RAID5sudo mdadm--create--auto=yes/

In order to meet different data transmission efficiency and security requirements, we have known RAID0, RAID1, RAID2, RAID3, RAID4, RAID5, RAID6, RAID10, RAID50 and other different levels of RAID, the following briefly commonly used RAID0/1/5/10 characteristics and the scope of application. RAID0: RAID0, also known as stripe mode, is to tie multiple disks together and become a large disk. When the data is stored, it presses the data on the disk Numbe

Original: http://blog.chinaunix.net/uid-639516-id-2692517.htmlClassification:A RAID definitionRAID (Redundant array of independent disk independent Redundant array) technology was proposed by the University of California, Berkeley, in 1987, initially to combine small, inexpensive disks in place of large expensive disks, while hoping that the disk will fail without damaging access to the data Development of a certain level of data protection technology. RAID is a redundant array of inexpensive di

(PERC 2,perc2/si,perc3/si,perc3/di), you will see the following information when the system is powered on self-test:Dell PowerEdge Expandable RAID Controller 3/di, BIOS v2.7-x [Build xxxx] (c) 1998-2002 Adaptec, Inc. All rights Reserved. If you have a AMI/LSI disk array controller (PERC2/SC,PERC2/DC,PERC3/SC,PERC3/DC, Perc4/di, PERC4/DC), you will see the following information when the system is powered on self-test:Dell PowerEdge Expandable RAID Controller BIOS x.xx June 26.2001 Copyright (C)

Fault Description:A hospital in Beijing EMC FC AX-4 storage crashes, due to the failure of 2 hard drives in the RAID5 array, when only one hot spare is successfully activated, resulting in the RAID5 array paralysis, the upper LUN is not working properly, the entire storage space consists of 12 1TB stat of hard disk, Of these, 10 drives form a RAID5 array, and the

RAID5 + disk quota, 1 disk, simulation of 5 disks in five partitions, four of which are made into RAID 5 partitions, the remaining one as a redundant disk, mounted to the/data1 directory, when one disk is damaged, the redundant disk status automatically changes to active. (You can also mount five disks, with the same effect .) For details about how to create a disk, see Http://dreamfire.blog.51cto.com/418026/1084729 Note: In a real production enviro

contiguous data, but for random data, odd and even disks can be a bottleneck for write operations. The use of a separate check disk to protect the data although no mirror security is high, but the hard disk utilization has been greatly improved for n-1. RAID4: Independent disk structure with parity code 　　 RAID4 and RAID3 very much like, the difference is that its access to data is based on data blocks, that is, by disk, each time a disk. As you can see in the picture, RAID3 is a horizontal b

faulty hard disk has been started or not, and whether the head can be traced, and then clean the hda oxidation component, replace the ROM chip, replace the head, and other common hard disk data recovery methods. However, in the actual data recovery process, hardware damage to one disk is serious and cannot be repaired. You can only back up and restore data through another disk.3. Data Recovery by reorganizing the RAID5 Array 3.1.Determine the start s

References for building disk arrays on Vmware Part 1:First, use the vmwarevm to create three logical disks (RAID5 requires at least three disks) for Array creation!Select the Virtual Disk path and name it disk1!Hard Disk (SCSI) is created for the first logical disk )! Next, create the second and third logical disks (likewise ),Hard Disk of the second Logical Disk (SCSI 0: 2 )!The third Logical Disk is hard disk (SCSI )!Next, click (green triangle )!

First, the current environment server name model raid type Zoning introduction HDD details /td> dc-4 dell R710 raid5 total: 836.62gbc disk: 60GB d Disk: 20GB e disk: 756.62GB 4 block 300G 650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/5D/CE/wKioL1UkszyS_pwPAANXlb3HPO4684.jpg "title=" 11.jpg "alt=" Wkiol1ukszys_pwpaanxlb3hpo4684.j

CentOS-How to add a new disk into a mdadm raid5/dev/md0 whick lost A/DEV/SDC1 disk and revoery at another m Achine?Fdisk-l--stop/dev/md0# to force active the raid by Remaind 3 disks. -A--force/dev/md0/dev/sdb1/dev/sde1/dev/sdd1# Add a new disk into/dev/md0--manage/dev/md0--add/dev/sdc1------------------------------------------------------------------------------------------------------We build a/dev/md0 on a Unitek (removeable USB Storadge with 4 di

RAID5 disk array technology requires at least 3 disks to do, plus 1 backup disks (this hard drive device is usually idle, and will automatically be replaced if there is a hard drive in the RAID array group), a total of 4 hard disk devices that need to be emulated into the virtual machine.[[emailprotected] ~]# fdisk-ldisk/dev/sdb:2147 MB, 2147483648 bytes, 4194304 sectorsunits = sectors of 1 * 512 = Bytessector size (logical/physical): bytes/512 bytesi

The first step:First, add the same disk on the CentOS virtual machine setup in VMware, with a number greater than 3. This is the condition of doing RAID5. Add a hard drive, handle the rest of the full tube outside the capacity to ensure the same drive configuration. To make sure it's good, I'll give you:The next step is to determine and then generate multiple hard disks.Step Two:If you open the virtual machine for operation, please reboot the virtual

following information when the system posts:Dell PowerEdge Expandable RAID Controller 3/di, BIOS v2.7-x [build xxxx] (c) 1998-2002 Adaptec, Inc. All Rights Reserved. If you have a AMI/LSI disk array controller (PERC2/SC,PERC2/DC,PERC3/SC,PERC3/DC, Perc4/di, PERC4/DC), you will see the following information when the system posts:Dell PowerEdge Expandable RAID Controller BIOS x.xx June 26.2001 Copyright (C) American Megatrends Inc.Press Ctrl+m to Run Configuration Utility or press ctrl+h for We

Classification: A RAID definitionRAID (Redundant array of independent disks independent redundant disk array) technology is the University of California, Berkeley, 1987, was originally designed to combine small low-cost disk to replace the large expensive disk, while the disk failed to make access to the data will not be compromised A certain level of data protection technology has been developed. RAID is a redundant array of inexpensive disks that appear as a stand-alone, large storage device