best raid for backup

three hard drives to achieve the array, it can realize RAID 0 acceleration function can also realize RAID 1 backup data function, when there are three hard disks in the array, it will be required to store the data according to the user-defined segmentation size into a file fragment stored in two hard drives, at this time, The third hard disk in the array does no

up data. In Matrix RAID mode, the data storage mode is as follows: The first part of two disk drives is used to create a RAID 0 array, primarily to store the operating system, applications, and swap files because the disk starts with a higher access speed, and Matrix raid 0 The main cause of the logical partition is placed on the front end of the hard disk (oute

hard disks to form a logical hard disk with acceleration, automatic backup, data corruption recovery and other functions.To meet the needs of different working environments, RAID technology is divided into the following RAID 0-7 Count 8. Each array has its own advantages and disadvantages, such as a RAID 1 array that

partprobe /dev/sda Partition and format mkfs.ext3 /dev/sda7 mkfs.ext3 /dev/sda8 Then you can create soft RAID 1. mdadm -C /dev/md1 -a yes -l 1 -n 2 /dev/sda7 /dev/sda8 Then, format the entire file.Mkfs. ext3 note that the format must be consistentCreate a mount point mkdir /mnt/raid1 Mount raid1 mount /dev/md1 /mnt/raid1 Now you can useYou can check the LS-L in CD, MNT, and raid1. drwx------ 2 root root 16384 07-30 17:00 lost+found You can also see

(striped), that is, to distribute continuous data to multiple disks for access ,. When the system has data requests, it can be concurrently executed by multiple disks. Each disk executes its own data requests. This type of parallel operations on data can make full use of the bandwidth of the bus, significantly improving the overall disk access performance. Because reading and writing are done in parallel on the device, the Read and Write Performance will increase, which is usually the main reas

virtual sub-hard disks are used to back up data through image backup to form RAID 1. In Matrix RAID mode, the data storage mode is as follows: the first part of the two disk drives is used to create a RAID 0 array, which is mainly used to store operating systems, applications, and swap files, this is because the regio

this time, the third and fourth disks are idle. When B data is written to the third Disk in a certain band, and B data is checked in the fourth disk, in this way, both data a and data B can be read and written at the same time. VII. Raid 6 Raid 6 adds a verification area on the basis of RAID 5, each of which has two verification areas. They use an unused verifi

RAID (Redundant Arrays of Independent Disks) disk array Hard-raid Raid-0: (equivalent mode, stripe): optimal performance When a file is to be written into raid, the file will be cut based on the size of the block, and then the data will be staggered to each Hard Disk in sequence. Therefore, when your data is to be wr

Graphic RAID 0, RAID 1, RAID 5, RAID 10 RAID (Redundant Array of Independent Disk Independent Redundant Disk Array) technology was proposed by the University of California at Berkeley in 1987, initially to combine small cheap disks to replace large expensive disks, at the sa

RAID5 in Linux (striping and distributed parity) Part 1: How to Set RAID6 in Linux (dual-distributed parity) Part 1: Configuring RAID 10 or 1 + 0 (nesting) in Linux) Part 1: add existing RAID arrays and delete damaged Disks Part 1: recover (rebuild) damaged drive in RAID Part 1: Managing RAID in Linux This is Pa

kernel is/proc, therefore, to configure MD, you must modify the parameters in the/proc and/sys files. However, it is very difficult to modify these parameters. Fortunately, there are system calls specifically for MD settings in Linux. People have developed a dedicated raid management tool through these system calls --Mdadm(Multi device administrator ). With mdadm, you can define multiple disk devices, assemble them into a

recommendations SQL Server File Raid level Operating System and SQL binary file Raid 1 Data and Indexing Raid 1 + 0 (RAID 5 can be used if the budget is not allowed) Logs Raid 1 + 0 Tempdb

the backed up battery power to keep the cache, even if a power failure occurs. For large-scale use is very expensive investment.Important RAID Concepts Checksum method to regenerate the lost content from the information saved by the checksum in the RAID rebuild. RAID 5,raid 6 is based on checksums. Striped i

resources. They have NVRAM for the cached read and write. When the cache is used for RAID rebuilds, it uses the backed up battery power to keep the cache, even if a power failure occurs. For large-scale use is very expensive investment.Important RAID Concepts Checksum method to regenerate the lost content from the information saved by the checksum in the RAID