In the current era of large data explosion, more and more enterprises pay more attention to the data security of enterprises, the integrity of data, then how to protect the enterprise data bank security, lossless? Then we use RAID technology, which is now a very hot virtualization, cloud computing, the bottom of the raid storage is used to complete. So what is RAID
.
·Configure a raid disk array
I. Why should I create a logical disk?When the hard disk is connected to the array card (RAID), the operating system will not be able to directly see the physical hard disk, so you need to create one by one to be set to raid0, logical disks such as 1 and 5 (also called containers) can be correctly identified by the system.Logical drive, container, or virtual drive
increases fault tolerance.Level classification for RAID:RAID 0: The data is evenly distributed across the array's disks in strips, so that the system has data requests that can be executed in parallel by multiple disks, each of which performs its own portion of the data request. The parallel operation on this data can make full use of the bus bandwidth, and significantly improve the overall disk access performance.Hardware requirements: Minimum of 2 disksPerformance advantages: Very high disk r
What problems should individual users pay attention to when building RAID, or a disk array?1. Q: What RAID solution should I choose, and the motherboard With RAID function? RAID Controller? Or software RAID?A: In fact, RAID soluti
Early due to raid is often used to combine some inexpensive SATA interface hard disk devices to complete redundancy.So the early full name is: redundantarray of independent Disks (independent redundant disk array). The primary function of RAID is to combine multiple hard disks on the motherboard in a specific way, organized into a logical whole with specific characteristics, and then output to the operatin
Server RAID 5 Data recovery caseThis shared case is a RAID disk array in a server, with 12 disks in the disk array, a single-disk capacity 500g,ext3 file system, and a Linux platform for the system platform. Raid in 2nd and 6th, two hard disks reported yellow lights, management personnel after the check on the 6th plate has been forced on-line operation, forced o
Linux hard Raid installation note-Linux Enterprise Application-Linux server application information. The following is a detailed description. Server Configuration:
CPU: Xeon 3210 quad core
Motherboard: Intel S3000AH
Memory: 2G DDR667 x 2
Hard Disk: WD2500YD x 2
Others: 1U chassis copper turbine fan
Installation prelude
Servers are collected from the purchase of accessories, which is cost-effective. After installation, the dealer installed a system te
In recent years, customers have always asked original storage engineers about the storage RAID plan (RAID, 5, 6 ....): "How many RAID are used? What RAID level is used? Why is RAID at this level used? What are the benefits of this level? Wait, "the storage engineer may be ti
In addition to using RAID cards or chips on the motherboard to implement disk arrays, we can directly use software to implement RAID functions in some operating systems, for example, the RAID function is built in Windows 2000/XP.Before learning about RAID in Windows 2000/XP, let's take a look at Dynamic Disk management
The raid:redundant Arrays of inexpensive disk is an inexpensive redundant array of disks that can be organized in different ways to improve IO capabilities, or improve durability, for multiple hard drives. RAID can be divided into soft raid and hard raid, soft raid through software implementation, hard
Early due to raid is often used to combine some inexpensive SATA interface hard disk devices to complete redundancy.So the early full name is: redundant array of inexpensive Disks (inexpensive redundant disk array). Today, RAID is also used by most businesses to combine SCSI and SAS interface hard disk devices.So now the full name is:redundant array of independent Disks (independent redundant disk array).
Early due to raid is often used to combine some inexpensive SATA interface hard disk devices to complete redundancy.So the early full name is: redundant array of inexpensive Disks (inexpensive redundant disk array). Today, RAID is also used by most businesses to combine SCSI and SAS interface hard disk devices.So now the full name is:redundant array of independent Disks (independent redundant disk array).
A new Linux server is being taken, ready to check for configuration raid.check for a RAID card first:
Copy Code code as follows:
# Dmesg|grep-i raid
Mptsas:ioc0:attaching RAID volume, Channel 1, ID 0
Device-mapper:dm-raid45:initialized v0.2594l
Md:autodetecting RAID arrays.
Obviously the
Enterprise-level database applications are mostly deployed on RAID disk array servers, which can improve disk access performance and implement fault tolerance and Disaster Tolerance. RAID (redundant disk array ),
Enterprise-level database applications are mostly deployed on RAID disk array servers, which can improve disk access performance and implement fault tol
RAID Basic Concepts, Special terminology introduction We offer RAID cards to support a variety of commonly used RAID levels, such as 0,1,5,10,50, you can choose based on the importance of the data, before starting to use the RAID card, we hope you can have a deeper understanding of the following concepts, so as
For a long time, we have seen a lot of competition over the performance of RAID 5 and raid 10. Even many people have come up with test data, but who is the right. Here, I will analyze the internal operating principles of these two raid types. Under what circumstances should we choose which raid mode.
In order to facili
Linux RAID card optimization and Linux raid OptimizationIntroduction
Our production servers often use raid storage. But can raid alone ensure high performance and data security? The answer is no. We generally recommend using raid cards with battery protection. This ensures p
Raid 10:
Make at least four hard disks into RAID 1. If there are four hard disks, there will be two to rand1 disks. If there are eight hard disks, there will be four to raid 1 disks, the biggest purpose of raid1 is to ensure high data security and high read/write speed, but to sacrifice half of the disk space. If the number 12345678 is written to a request, the w
: Make any block device raidModal Commands:To create a pattern:-CDedicated options:-L: Level-N: Number of devices-a -c:chunk size, data shard size, default 64KB-X: Specify the number of free disks# mdadm-c/dev/md0-a yes-l 0-n 3/dev/sd{b,c,d}-Create raid0/dev/md0 three-block disk# mdadm-c/dev/md0-a yes-l 1-n 2-x 1/dev/sd{b,c,d}-Create RAID1 with free disk# Cat/proc/mdstat-View array statusManagement mode:--add,--Remove,--fail# mdadm/dev/md0--fail/dev/sdb---/dev/sdb to unavailable stateMonitor mod
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.