best raid for backup

/backup directory when it is powered on;Create a 2G size RAID0 can be 4 x 512MB or 2 1GCreate a 2G size RAID1 can be 2 x 2GCreate a 2G size RAID5 can be 3 x 1G Watch: Executes the specified command periodically and displays the results in full-screen mode -N #: Specifies the period length in seconds and defaults to 2Format: Watch-n # ' COMMAND ' (double quotes also line)Example: Watch "Cat/proc/mdstat" Save the current

RAID configuration and management in Linux I. Lab Environment1): Virtual Machine2): configure the lingux system on the Virtual Machine3): use linux to implement Raid configuration4): Add 6 hard disks to the Virtual Machine Ii. Lab Objectives1): familiar with several commonly used Raid2): familiar with configuration commands for Raid 0

The old raid on the CentOS server cannot be formatted. An old hard disk is attached to the server. If you want to format the historical data and save it, use fdisk to report the following error: /Dev/sda1 isapparently in use by the system; will not make a filesystem here! In general, this is because the disk has been used by the system or mounted to another place. Use mount and df-lh to confirm that the disk is not used. I have compiled a similar ar

RAID disk array devices, which often encounter some common failures during use, also bring a lot of hard-to-estimate data risk beyond the applications that bring us massive storage space. This article will focus on RAID data recovery common failures and related processing methods.First, RAID basic knowledgeThe simple explanation for a

Common hard drives: SATA General pc mainstream HDD. SCSI general servers are widely used. The IDE is older and both are available. RAID it means redundant array of inexpensive disks. is a collection of disks that are placed together to become a logical volume. Software RAID and hardware RAIDSoftware RAID performance is low, use host resources, load

should be careful if you are maintenance personnel. What do you mean! So I sent an email to the Director and the Development Manager to discuss the fault details and provided the current emergency solutions. The image server made a backup of the file on a different machine, because the database server is in a master-slave structure, there is no need to worry about this. Every day there is a backup plan fo

The disk array is made up of many inexpensive disks, combined into a large disk group, which uses individual disks to provide data with the added effect to improve the performance of the entire disk system. Using this technology, the data is cut into many sections, stored on each hard drive, even if there is a piece of damage, no data loss, and can continue to use. Introduction to RAID (disk array): What is

RAID 0 + 1 is a combination of RAID 0 and RAID 1, also known as raid 10. Taking RAID 0 + 1 composed of four disks as an example, the data storage method of RAID 0 + 1 is a solution that combines storage performance and data sec

Intel S5000VSA (SAS) motherboard setup RAID stepsI recently personally installed a server, with the Intel S5000VSA 4DIMM motherboard, because in the installation process did not notice some details, so in the installation encountered some problems, and then after everyone's research and discussion, finally successfully solved these problems, in order to accumulate experience, Also in order to allow other colleagues to avoid the network, save time, spe

Continuous OPEN-E DSS V7 Application Series three introduction to Web managementFirst, RAID technology introductionRAID (Redundant array of independent Disks): Independent redundant disk array, abbreviated to disk array. RAID is a storage device that is organized in a certain form and scheme. It is better than a single storage device in speed, stability and storage capacity, and has a certain degree of data

Overview As the disk capacity increases, data storage reliability at the RAID level is greatly threatened. The most prominent problem is that the disk reconstruction time is greatly increased. For raid 6, the probability of three disks being damaged is also greatly increased. At the same time, the application performance is also greatly reduced during disk restructuring. This is the most difficult problem e

Soft RAID-mdadm tossing noteRAID-a disk array. In short, it is used to improve the utilization and speed of hard disks.RAID type (theory ):RAID 0: read/write performance (at least two hard disks)-hard disk usage is the sum of all hard disks and performance is the sum of all hard disks.RAID 1: read/write performance, redundancy (at least two hard disks) --- space utilization: the smallest of all disks (n/2);

Reference Document http://www.cnblogs.com/ivictor/p/6099807.htmlMaking RAID5 http://blog.51cto.com/11134648/2103384RAID0also known as stripe or striping, it represents the highest storage performance in all RAID levels. RAID 0 improves storage performance by spreading continuous data across multiple disks, so that the system has data requests that can be executed in parallel by multiple disks, each of which

We usually have no choice at the raid array level when deploying servers. RAID technology has grown into dozens of categories today, but there are only a few commonly used in production systems, for example, 0, 1, 5, 0 + 1. Readers may be familiar with the raid principles of various levels and may even be able to recite them. However, when selecting the most suit

setting automatically skips some of the unstable sectors, so now the mirror is incomplete, then the copy policy is adjusted to continue mirroring the skipped sectors, and all sectors on the 6th are mirrored.The physical sector image of all the hard disks is obtained, and all the image files are expanded using Winhex under the Windows platform, and according to our analysis of the reverse and log files of the Ext3 file system, we get the disk sequence of 16 FC disks in storage, the

Problem When a raid is not working because of a hard drive being taken offline, or for other reasons, before data recovery services, should there be an emergency response to avoid data risk? Answer (North Asia Data Recovery Center, Tommy Cheung, [Url]http://www.datahf.net[/url]) See RAID offline for reasons "[Data recovery troubleshooting]raid is it really saf

1. What is RAID1? RAID1, which can be called an image, writes data to multiple disks. For example, if A group of data is called A, data exists like this: A and A. In this way, data security is high, but performance is poor. Two or more groups of N disks are used as images for each other. In some multi-threaded operating systems, the read speed is good, and the write speed is slightly reduced. Unless the primary disk and image with the same data are damaged at the same time, the operation can be

Recently, the server encountered a small problem. I had to redo raid. I found an article on the Internet. I felt very careful. I 'd like to share it with you. Record the record when the server is reinstalled and share it with you. Hardware RAID 5: Recently, I personally assembled a 1u rack-mounted storage server with an 8-hard drive using a dual-core P4 820d processor. During the assembly process, I create

Failure Phenomenon: How should the actual capacity of the various RAID groups be calculated? 　Solution: 1, RAID 0 (striped disk Array without Fault tolerance): RAID0 all hard drives in parallel, capacity is the sum of all hard disk capacity, and hard disk access speed depends on how many hard drives, when the number of hard drives RAID The faster the 0 array a

Data security is one of the most important problems people use in computers. Typically, a hard disk mirroring technique is used in a server environment to achieve a dual backup of the data. Also, we can use this technology in a Linux environment. In the Linux environment, the use of raidtools tools, not only can be two hard disk mirroring, but also can make soft RAID0, RAID1, RAID5. Said to be soft raid, b