nas raid5

RAID Mode IntroductionThe Orico 3559RUS3 HDD enclosure provides five types of disk array build modes, including RAID 0, Raid 1/10, RAID 3, RAID5, Combine, which have different functions, as explained below.RAID, the English "Redundant Array of independent Disks" abbreviation, the Chinese name is called "Redundant Array of independent disks", referred to as "disk array". (see Wikipedia)Combine:Combine mode, in fact, we are familiar with the JBOD (Just

Array level Description:Raiddefaults: Configure array by default (1 HDD default configuration volume,2 block HDD default configuration raid1,3 block above HDD default configuration RAID5)RAID 0: Configure 1 Raid0 with all available hard drivesRAID 1: Configure 1 RAID1 with the first 2 drivesRAID 10: Configure 1 RAID10 with the first 4 drivesRAID 5: Configure 1 RAID5 with all available hard drivesRAID 1+RAI

RAID. Hardware RAID requires hardware as support, which requires a RAID card. It is characterized by fast speed, good stability, and can effectively provide high level of hard disk availability and redundancy. Test to the price, the general it enthusiasts to buy and sell the use of RAID is not much. Fortunately, many operating systems such as Microsoft, starting with Windows 2003, provide embedded software RAID capabilities, and soft raid can implement RAID0, RAID1,

Three factors for calculating disk IOPS: 1, RAID type read and write IOPS calculation formula for different RAID types: RAID type Formula RAID5, RAID3 Drive Iops=read ioPS + 4*write ioPS RAID6 Drive Iops=read ioPS + 6*write ioPS RAID1, RAID10 Drive Iops=read ioPS + 2*write ioPS 2. The IOPS value of the hard disk type has different disk type IOPS:

me, I'm a raid card. " I stopped kicking, just want to up the factory when the master let me bring an artifact, called a raid card. I said: It is you, do not know what you do, then you say, what you do, not clear, I then cut you. RAID card slowly: To say that my raid card family in the lake is also famous, all martial arts gangs will have us such a weapon, you see Dell, IBM, HP three gates sent each home has our RAID card figure, although martial arts moves some differences, but we play a rol

DELL RAID Operation Steps1, start the start, Quick press ctrl+r, press more times650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/70/FD/wKioL1XDBa6ACI1sAAGg3Puivkk949.jpg "title=" Picture 1.png "alt=" Wkiol1xdba6aci1saagg3puivkk949.jpg "/>2, the following interface appears: The level of RAID displayed at the right of the graph raid5 , and the size of the disk650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/71/01/wKiom1XDA7-SBq6Y

group. Therefore, RAID5 is suitable for large data volume operations and various transaction processing. It is a fast, high-capacity, and fault-tolerant disk array. Only one hard disk is allowed to fail. Raid3 and RAID5 performance raid3 no matter which disk is written to, the disk needs to be written to the verification disk, so the verification disk will become the bottleneck for writing big data, so it

time it is a disk, RAID4 features similar to RAID3, but in the case of failure recovery, it is much more difficult than RAID3, and the controller design is much more difficult, in addition, the data access efficiency is not very good. 7. RAID5 RAID 5 disperses the verification block to all data disks. RAID 5 uses a special algorithm to calculate the storage location of any band verification block. This ensures that any read/write operations on the ve

and can be horizontally expanded without limit. Select an analysis system server, which is basically a single machine with RAID 0 + RAID 5 + SSD large memory + multiple CPUs. SSD is used to analyze the demand for real-time reports. RAID0 mainly stores data for one month, which is basically a requirement for frequent access to data reports. RAID5 or RAID10 are used to store historical data. Large Memory is mainly used for group by operations, and mult

different ports of the array to increase transmission speed. Like the integrated cache in a single disk in a PC at that time, a certain amount of buffer memory is provided in the disk array to speed up interaction with the host. The cache interaction between the host and the disk array, and the interaction data between the cache and the specific disk. In applications, some common data needs to be read frequently. The disk array searches for frequently read data based on internal algorithms and

: 0xfa2f1e15 [[Email protected]/] # mdadm-C/dev/md0-c512-L1-N2/dev/SD [B-c] -- Auto = Yes [[Email protected]/] # Cat/proc/mdstat Personalities: [raid6] [RAID5] [raid4] Md0: Active RAID5 SDC [2] SDB [0] 976631296 blocks super 1.2 Level 5,512 K chunk, algorithm 2 [2/1] [U _] [================>...] Recovery = 74.4% (727073492/976631296) finish = 46.4 min speed = 89539 K/sec Bitmap: 0/8 pages [0 KB], 65536

;d OneMethod Two: Use XargsNETSTAT-TANP |grep 3306 |awk ' {print $NF} ' |cut-d '/'-F 1 |xargs-i ' {} ' kill-9 {}Method Three: Using awkNETSTAT-TANP |grep 3306 |awk ' {print $NF} ' |cut-d '/'-F 1 |awk ' {print ' kill-9 ' $} ' |bashTopic 4:Use the Curl or wget command to get header information for the HTTP service.Topic 5:For Linux user accounts, the following statements are correct:A. The user's password is stored in clear text in the/etc/passwd file.B. The user's password, which is stored in the

is called the big-endian (Big-endian) byte order.24. What is the host byte order, network byte order, the difference?The host byte order of the X86 machine is little endian will be the low byte (that is, the right byte, such as 0x1234, then 34 is the low byte) stored in the start address (in the operating system is also a low address)The network byte order is that the big endian is storing the high byte at the start address (also the low address in the operating system)The characteristics of 25

RAID (Redundant array of inexpensive disks) is referred to as a disk array, combining multiple hard disks into a single logical sector, so that the performance of poor performance of the hard drives, to reach even more valuable, larger capacity of the hard disk. and increase the data integration, fault tolerance, processing capacity, capacity. This blog only describes the most commonly used RAID-5RAID-5 OverviewIn RAID5, you need at least 3 hard drive