adaptec raid

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

let's start with the topic: raid Hardware Knowledge. of course, we just discuss the performance and security of raid hardware from the perspective of applications. Cache Cache is essential for a high-end RAID. Generally, the DDR2 memory particles used by RAID cards are almost the same as our memory. The

Disk/dev/sde: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders Units = cylinders of 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System 1. create Soft RAID 1. create a raid partition [root@www.linuxidc.com ~] # Fdisk/dev/sdb The number of cylinders for this disk is set to 1044. there is nothing wrong with that, but this is larger than 1024, and cocould in certain setups ca

*512 = 8225280 bytes Device Boot Start End Blocks Id System Disk/dev/sdd: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders Units = cylinders of 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System Disk/dev/sde: 8589 MB, 8589934592 bytes 255 heads, 63 sectors/track, 1044 cylinders Units = cylinders of 16065*512 = 8225280 bytes Device Boot Start End Blocks Id System 1. create Soft RAID 1. create a

Enterprise-levelDatabaseMost applications are deployed inRAIDThe disk array server can improve the disk access performance and implement fault tolerance/disaster tolerance.RAID (redundant disk array) is simply an array made of cheap hard disks. The objective is to expand storage capacity, improve read/write performance, and achieve data redundancy (backup and disaster tolerance ). It is like a foreigner who used to take N old PCs to form a powerful "server ".Cluster".

Software RAID 0, software RAID Implementation of Software RAID 0 RAID 0, also known as Stripe or Striping, represents the highest storage performance in all RAID levels. RAID 0 improves storage performance by distributing continuo

Software RAID: can only be viewed by the Linux system itselfCat/proc/mdstatYou can see information such as RAID level, status, and so on.Hardware RAID: The best way to do this is through the management tools of the installed RAID vendors, with CmdLine and graphical interfaces. such as the

In the early days of computer development, the price of "large capacity" hard disk is still quite high, the main way to solve the problem of data storage security is to use devices such as tape drive to backup, although it can guarantee the security of data, the work of lookup and backup is quite tedious. In 1987, three engineers, Patterson, Gibson and Katz, published a paper entitled "A case of redundant array of inexpensive disks (redundant array of Inexpensive disks scheme)" at the University

0000:01:00.0:setting Latency Timer to 64IRQ 16/aacraid:irqf_disabled isn't guaranteed on shared Irqsscsi0:aacraidscsi 0:0:0:0: direct-access Adaptec RAID10 -A V1.0 pq:0 ansi:2[Email protected] ~]# CAT/PROC/SCSI/SCSIattacheddevices:host:scsi0channel:00id:00lun:00vendor: adaptecmodel:raid10-arev:v1.0type:direct-accessansiscsi Revision:02host:scsi0channel:01id:00lun:00vendor:model: TXB2C10960GG7SLTRev:ZN1HType:Direct-AccessANSISCSIrevision: 05host:scsi0

Software raid: you can only view cat/proc/mdstat on the Linux system to view raid level, status, and other information. Hardware raid: The best solution is to use the installed raid vendor's management tools to check whether there is a broken line or a graphical interface. For example, the hardware card of

Introduction RAID, English is all called: Redundant Arrays of independent Disks, Chinese translation: Independent fault-tolerant disk array, formerly known as a fault-tolerant low-cost disk array, is now generally referred to as a disk array. The thing is presented by UC Berkeley, which can be used to integrate multiple smaller hard disks into a larger disk, and also to protect data. Now the disk array is divided into: software

View raid information and disk information in CentOSSometimes you want to know how many disks are on the server. If raid is not performed, you can simply use fdisk-l to see it.But after raid, we can't see it. So how can I check whether raid is performed on the server?Software raid