best raid for backup

Partition Table This error is reported because the virtual machine is used. It is unclear, but you can use partx to reread it. Input: partx-a/dev/sdb These errors do not have much impact. You only need to check whether the device has read them. Input: cat/proc/partitions As shown in the following figure, the created sdb7 and sdb8 have also created a 2G sdb9 instance for subsequent damage simulation. Now use mdadm to create RAID1 Input: mdadm-C/dev/md1-a yes-l 1-n 2/dev/sdb7/dev/sdb8 Enter y

RAID server data Recovery Most failures are the loss of RAID array information, which causes the RAID server not to start and use, often requires the data recovery company to do RAID reorganization to function properly, from the data recovery point of view, the RAID server h

1. What is RAID?RAID is a fault-tolerant, inexpensive disk array that consolidates multiple small disks into a larger disk device that not only expands the capacity of the disk, but also enables data protection.2.RAID RatingRAID depending on the level of the implementation of the function and performance is also differentRAID0 requires at least two disks, dividin

(redundant backup)4, RAID 10: (also known as RAID 0+1) is a combination of disk segmentation and mirroring, using 2 groups of RAID0 disk arrays to mirror each other, they become a RAID1 array. The high speed and RAID 1 data of RAID 0 are also highly reliable, but the CPU us

principle, the main implementation is to make a large logical disk of multiple physical disks, in the data IO when the individual chunk will be written to the polling physical disk, RAID-0 mainly to achieve the expansion of the partition space.RAID0 Performance Analysis:1. IO performance: Improved read and write performance, because reading and writing data while reading and writing data to multiple disk space, will increase the read and write rate2.

greatly improves RAID card write performance, which in most cases reduces the system IO load. The reliability of the data is guaranteed by the raid card's BBU (Battery Backup Unit). Writethrough: Data writes do not use caching and data is written directly to disk. RAID Card write performance is degraded, and in mo

RAID, a Redundant Array of cheap disks, is a method of storing the same data in different locations on multiple hard disks. RAID has many different types (called RAID "level"). Each type has its own advantages and disadvantages.　　For Oracle9i databases, many RAID solutions do not have the high performance required by O

, 650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/72/9D/wKiom1XojNGgqyKHAADu0lPcdrc000.jpg "title=" RAID1 " Width= "274" height= "border=" 0 "hspace=" 0 "vspace=" 0 "style=" width:274px;height:230px; "alt=" Wkiom1xojnggqykhaadu0lpcdrc000.jpg "/>3) RAID-5 :The data write is similar to RAID0, the difference is that, RAID5 in the process of data writing, in each disk also added a same bit check data (parity), this data will record t

Tags: digital performance etc database fault tolerant storage exception div Create fileThe 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 technique, the data is cut into many sections and stored on each hard driveThe disk array can also take advantage of the concept of the same-bit inspection, in the array of any one hard disk fail