adaptec raid

Introduced?????? Often when discussing the performance of different RAID protection types, the conclusion will be that RAID-1 provides better read and write performance, RAID-5 read performance is good, but write performance is not as high as raid-1,raid-6 protection level,

NVRAM is a card and has no physical connection with Ram, although they all look like memory. the first type is used in low-end netapp products, and the second type is used in high-end netapp products. Ram stores data caches, while NVRAM stores operation logs. Similar to the database's archive log. Think: NVRAM is protected by a battery, but what about Ram? Data cache is installed in Ram. If it loses power, it will lose data. I have consulted many people and cannot get a clear and detail reply..

will introduce raid Raid is short for "redundant arrayof independent disk", which means "independent redundant disk array" in Chinese ". A simple explanation is to combine n hard disks with RAID Controller (hardware, software) into a single virtual large-capacity hard disk. Disk Arrays use different technologies for different applications, called

When asked whether traditional raid can be built on SSD, the first response should be "yes, but trim command support is required ". On the Internet, we can also see that many people use SSD to create raid, but basically it is configured as RAID 0 or raid 1. Few people will build RAID5. Why? The answer is very simple. I

RAID: The controller divides an interface into multiple interfaces and makes these devices a whole, and the system is just not a whole Storage interface type: IDE SATA USB SCSI SAS (serial Port SCSI) RAID Leve:raid Level: O: Striped split data, one file stored separately on several memory, high efficiency 1: Mirror, need at least two blocks of memory, while the two pieces of memory to write the same

What is RAID? RAID is an abbreviation for the English Redundant array of independent disks, which translates into Chinese as a redundant array of independent disks, or simply a disk array. Simply put, RAID is a technology that combines multiple separate hard disks (physical hard disks) into a single hard drive group (logical hard disk) in a different way, provi

RAID is known as a cheap redundant array of disks, which is due to the small, poor performance and vulnerability of early disks. So RAID's primary practice is to combine multiple inexpensive small disks into a single disk group, allowing performance and disk capacity to be equivalent to expensive disk performance.Depending on how the raid is combined, RAID has di

First, the conceptdisk array (redundant Arrays of independent Disks,raid), with the meaning of "redundant array of independent disks". is designed to improve the read and write speed of files on disk.The data that is stored in the disk is divided into one stripe, which is then saved in parallel to the disk array, or the data is taken in parallel in the form of a stripe in the disk array. Such as:Second, the level of

IntroductionOur production servers often do raid storage, but can you guarantee performance and data security by simply doing raid? The answer is no, we generally recommend the use of battery-protected raid cards, so as to ensure that performance can ensure data security, but also need to maintain the battery frequently, because of the cost of the general

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

Do you know the RAID initialization process? The RAID system is an effective means to protect the stored data. During RAID creation, a very long system initialization process often exists. Why is there such an operation during RAID initialization? What is the impact of this operation on SSD? From the perspective of tec

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, because the

Raid,redundant Arrays of the abbreviation for independent disks, redundant array of independent disks, referred to as disk array. The disk array is actually divided into soft array (Software RAID) and hard array (hardware RAID). Soft array: That is, through software programs and the computer's CPU to provide operational capabilities. Because the software progra

Disk array (RAID) instances RAID Technology classification Soft RAID Technology Hard RAID Technology The difference between RAID and LVM Why choose to use raid

: What is RAID: disk array (redundant Arrays of Independent Disks raid " The redundant array of independent disks " The disk array is made up of many inexpensive The disk array can also take advantageof the concept of Parity check Array any one of the Hard Drive Failure , the data can still be read, and when the data is refactored, the data is computed and re-placed into the new hard drive. H

I. Business UNIT requirements Description: The company recently came up with a batch of servers for big data service deployments. The Data node server consists of 14 physical disks, 2 of which are 900G disks, and 12 are 4T disks. When the server system is installed, enter the BIOS interface of the system:1) make 2 900G disk RAID1 as System disk , 2) make RAID1 of 2 4T disks and mount them to/data1 and/ Data2 is used as a big data log storage; 3) Additional 10 4T disk in the system installation d

1. What is raid0? Raid0, which divides data into several halves and writes data to multiple disks A: A1 A2 ...... Performance improvement. At least two disks are required. Merge multiple disks into a large disk with no redundancy and parallel I/O, with the fastest speed. RAID 0 is also called a zone set. It associates multiple disks to form a large disk. When storing data, the data is segmented by the number of disks and written into these disks at t

Can TRIM operations be performed in RAID? I wonder if you have considered the following question: can TRIM operations be supported in RAID? Imagine how to unmap the data block in the SSD by using the TRIM command after the RAID is created on the SSD and the application software (File System) runs directly on the RAID s

IntroducedOften when discussing the performance of different RAID protection types, the conclusion will be that RAID-1 provides better read and write performance, RAID-5 read performance is good, but write performance is not as high as raid-1,raid-6 protection level, but wri

RAID (Redundant array of independent Disks): Redundant array of independent disks. The initial purpose of RAID was to address the need for small and medium-sized businesses to use SCSCI hard drives for financial reasons, and to combine multiple IDE disks with a mechanism that would allow IDE disks to improve read and write performance to some extent, using a disk that is cheaper than the IDE. Of course, it