Quantcast
Channel: Comments on: RAID 0, RAID 1, RAID 5, RAID 10 Explained with Diagrams
Viewing all 163 articles
Browse latest View live

By: Thomas Vanhoutte

0
0

Thank you for this great explaination – especially the pictures helped me a lot to understand the difference between RAID 0, 1, 5 and 10.


By: hari

0
0

i learn about raid levels very well with ur diagrammatic representation but some matter missing about stripping,mirroring

By: Gerald

0
0

@hari, you are joking right? The A, B, C etc don’t give you a clue? and the fact that on RAID-1 it has A on both sides? and it says mirrored in the diagram description!

By: Matt

0
0

I really appreciate this site. Really simplifies the differences to help them be more digestible and make sense. Thank you for putting it together.

By: Billfeld

0
0

Thanks a lot for this quick overview! :-)

By: prateek

0
0

good post . .
but try to elaborate it more . .

By: raja

0
0

I really appreciate this site. Really simplifies the differences to help them be more digestible and make sense. Thank you for putting it together.

By: ranipriya


By: Chuckles

0
0

I know this may be a simple question however, can I set up the raid level 1 across IDE and SATA ? Just wanting to migrate to SATA and provide some redundancy to this server.
Thanks fore your time.

By: Rupesh

0
0

In computers that use multiple hard disk systems, disk striping is the process of dividing a body of data into blocks and spreading the data blocks across several partitions on several hard disks. Each stripe is the size of the smallest partition. For example, if three partitions are selected with one partition equaling 150megabytes, another 100MB, and the third 50MB, each stripe will be 50 MB in size. It is wise to create the partitions equal in size to prevent wasting disk space. Each stripe created is part of the stripe set. Disk striping is used with redundant array of independent disks (RAID). RAID is a storage system that uses multiple disks to store and distribute data. Up to 32 hard disks can be used with disk striping.

There are two types of disk striping: single user and multi-user. Single user disk striping allows multiple hard disks to simultaneously service multiple I/O requests from a single workstation. Multi-user disk striping allows multiple I/O requests from several workstations to be sent to multiple hard disks. This means that while one hard disk is servicing a request from a workstation, another hard disk is handling a separate request from a different workstation.

Disk striping is used with or without parity. When disk striping is used with parity, an additional stripe that contains the parity information is stored on its own partition and hard disk. If a hard disk fails, a fault tolerance driver makes the lost partition invisible allowing reading and writing operations to continue which provides time to create a new stripe set. Once a hard disk fails, the stripe set is no longer fault tolerant, which means that if one or more hard disks fail after the first one, the stripe set is lost. Disk striping without parity provides no fault tolerance. The disk striping process is used in conjunction with software that lets the user know when a disk has failed. This software also allows the user to define the size of the stripes, the color assigned to the stripe set for recognition and diagnosing, and whether parity was used or not.

By: Claus M

0
0

Nice article refreshing my understanding of the RAID concept. I’m on the search for a stable and fast disk system to be included in a music production setup and considering the Promise Pegasus R4 system. Any good/bad experiences out there?

By: Rahul vishwakarma

0
0

Please tell me about RAID,SATA,SCSI Hard disk.

By: Gerald

0
0

@chuckles, sure but only as a temporary measure. You would do better to backup/restore your data between the two different disk architectures.

@rupesh, i am not sure that your wordy and sometimes bizarre explanation adds anything to the basic explanations that started this thread.

@clausM, try subscribing to something like http://www.experts-exchange.com for this kind of advice.

@rahul, well RAID is described quite well on this web page, you can also find details of this and your other topics on wikipedia

By: vijay

0
0

Parity is to check whether the data is written same on all the disks. We can set a flag to detect the error of the data is not written same on all the disks.
Strip is for writing the data in all disks,data striping is the technique of segmenting logically sequential data, such as a file, in a way that accesses of sequential segments are made to different physical storage devices. Striping is useful when a processing device requests access to data more quickly than a storage device can provide access

By: Andri


By: nawaf

0
0

its easy to understand .it would become simple it each part is labelled with numbers indicating the mirror,stripping etc

By: Prabhu

0
0

Dear all,

I’m new to this RAID concept and just today I came across this topic and I was interested in this. To begin with, I have a laptop with just one drive(c:\) where the operating system and all my personal data resides, I don have any drive partitioned. Can I use RAID0 concept for redundancy in my laptop which has only a single drive? If so how am I to proceed with.

Thanking you all in advance !

By: shahin sharma

0
0

this artical is very good. its easy to understand.
thanking u.

By: Anonymous

0
0

@prabhu – I don’t think you have understood the RAID concepts that have been discussed in this blog!!!
First of all RAID0 has NO redundancy! It was NOT defined in the original work on RAID and was added later to appease the manufacturers. And no you cant realise RAID0 on a single drive! – well yes you can, but only by using multiple partitions on the same drive, but why would you do that as it doesnt give you any of the advantages of RAID0.

By: Thin_Techie

0
0

What good (or bad) things happen if RAID 5 would have all the parity blocks on 1 drive?

Things could still be rebuilt… if any 1 of the 3 drives were lost.

Viewing all 163 articles
Browse latest View live




Latest Images