An Intro To Raid Computer Systems
I'm employed in search engine marketing and we touch on everything from web design to SEO. We are able to be cruching huge files on our server and on occasions it can be real slow. So someone discussed we need quicker hard drives called raid. What is a raid setup on a P. C. system?
Like anything else it depends who you talk to.
Raid drive systems had their acronym explained as "Redundant Variety of Individual Drives "and "Redundant Range of Cheap Drives". The acronym for that is the shortened term "RAID".
Capacity, reliability and performance are all crucial for file servers or other PC systems when you are storing giant or vital files.
It is frequently declared that "It is not if you drive will fail. It is when in time your hard drive will fail".
Naturally if your hard drives fail even if you have backup the last bit of info which was being written onto the drive when the failure happened will be lost.
It is easy to get much bigger capacities, avoid losing data from disk failure, and do all this with the RAID (the acronym for the system).
RAID can now be done with standard available hard drives so that the cost is now within your price bracket for all of the benefits and reassurance RAID will give you.
RAID can be simply explained as putting the hard drives in parallel sequence.
The host adapter (often called the RAID system controller) sits between one higher stream (on the computer side) and a few lower rate information streams (on the drive side). When the computer writes to the disks, the host adapter takes high stream info and breaks it into many synchronized streams, one for each of the disks in process called "Striping ". On reading the data the host adapter takes the info stream from each disk multiplexes the sets of information streams and coordinates sending the resulting combined set of information onto the computer.
It's all a matter of redundancy which makes RAID such a nice thing in most cases.
There are six assorted levels of RAID functionality depending on your necessities. "the level of data security and integrity you want as well as the scale of drive space you need.
First of RAID Level 0 which spreads the data across multiple disks. It's easy to get an analogous effect to the RAID Level 0 by having multiple disks and using the features in Windows 2000 or its successor Windows XP.
Since the data volume and rate to any specific disk is a small part of the aggregate you will receive bigger capacity and better performance from a RAID 0 set up than from any one conventional disk.
As well info can be obtained from multiple drives as once. This is often most handy in shared scenarios which may gain benefit from enhancements in speed, two examples which come to mind are game servers and peer-to-peer (P2P) file or music file sharing servers.
However since there's no allocation for gaffe correction or redundancy RAID 0 is not a safe system for vital information. Data will be lost on disk failure. Only use RAID 0 in circumstances where you want the extended disk capacity or performance gain although not enhanced information reliability.
Second in sequence there's RAID Level 1.
In the same way that RAID 0 focuses solely on storage capacity and performance with no concern whatsoever on trustworthy information storage RAID 1, which us also called "Disk Mirroring" uses disks in pairs to save the files in a redundant demeanour.
One or two points.
One performance could be slower as it needs time for the host adapter to send the data and for the drives to scribble it to disk,
Secondly a user may remove or damage files which of course will be stored in that way on both drives.
Raid 1 therefore offers better reliability than RAID 0 or the typical drive setups but does not give full security for your info or boosted performance.
Next in sequence we have RAID Levels 2, 3 and 4.
Raid 2 adds several disks to hold blunder correction codes with which lost information can be reconstructed.
Raid Level 3 is the same as RAID Level 2 but uses an easier code the maximum storage capacity with Raid 3 may be somewhat less.
Raid Level 4 is nearly the same as RAID LEVEL 3 but rather than "Striping" across disks is operates at a sector level, You now have the better situation of both a simpler, less intensive demanding system and as well as good information reliability. In addition performance might be boosted as large information blocks can be written quicker due to more coordinated writing to the drives in smaller "sector" areas.
Lastly is RAID Level 5.
Raid level 5 is the same as the glorious RAID Level 4 except that instead of dedicating a single disk to storing the data the information stream is striped across all of the disks. You have greater performance with bigger trustworthiness for your PC systems.
A RAID setup may take some effort and training on your part.
Base your planning for your new RAID system on a careful analysis of your requirements.
What is critical in your current position now? Disk size capacities, info trustworthiness and integrity, performance or a combination or all.
Like anything else it depends who you talk to.
Raid drive systems had their acronym explained as "Redundant Variety of Individual Drives "and "Redundant Range of Cheap Drives". The acronym for that is the shortened term "RAID".
Capacity, reliability and performance are all crucial for file servers or other PC systems when you are storing giant or vital files.
It is frequently declared that "It is not if you drive will fail. It is when in time your hard drive will fail".
Naturally if your hard drives fail even if you have backup the last bit of info which was being written onto the drive when the failure happened will be lost.
It is easy to get much bigger capacities, avoid losing data from disk failure, and do all this with the RAID (the acronym for the system).
RAID can now be done with standard available hard drives so that the cost is now within your price bracket for all of the benefits and reassurance RAID will give you.
RAID can be simply explained as putting the hard drives in parallel sequence.
The host adapter (often called the RAID system controller) sits between one higher stream (on the computer side) and a few lower rate information streams (on the drive side). When the computer writes to the disks, the host adapter takes high stream info and breaks it into many synchronized streams, one for each of the disks in process called "Striping ". On reading the data the host adapter takes the info stream from each disk multiplexes the sets of information streams and coordinates sending the resulting combined set of information onto the computer.
It's all a matter of redundancy which makes RAID such a nice thing in most cases.
There are six assorted levels of RAID functionality depending on your necessities. "the level of data security and integrity you want as well as the scale of drive space you need.
First of RAID Level 0 which spreads the data across multiple disks. It's easy to get an analogous effect to the RAID Level 0 by having multiple disks and using the features in Windows 2000 or its successor Windows XP.
Since the data volume and rate to any specific disk is a small part of the aggregate you will receive bigger capacity and better performance from a RAID 0 set up than from any one conventional disk.
As well info can be obtained from multiple drives as once. This is often most handy in shared scenarios which may gain benefit from enhancements in speed, two examples which come to mind are game servers and peer-to-peer (P2P) file or music file sharing servers.
However since there's no allocation for gaffe correction or redundancy RAID 0 is not a safe system for vital information. Data will be lost on disk failure. Only use RAID 0 in circumstances where you want the extended disk capacity or performance gain although not enhanced information reliability.
Second in sequence there's RAID Level 1.
In the same way that RAID 0 focuses solely on storage capacity and performance with no concern whatsoever on trustworthy information storage RAID 1, which us also called "Disk Mirroring" uses disks in pairs to save the files in a redundant demeanour.
One or two points.
One performance could be slower as it needs time for the host adapter to send the data and for the drives to scribble it to disk,
Secondly a user may remove or damage files which of course will be stored in that way on both drives.
Raid 1 therefore offers better reliability than RAID 0 or the typical drive setups but does not give full security for your info or boosted performance.
Next in sequence we have RAID Levels 2, 3 and 4.
Raid 2 adds several disks to hold blunder correction codes with which lost information can be reconstructed.
Raid Level 3 is the same as RAID Level 2 but uses an easier code the maximum storage capacity with Raid 3 may be somewhat less.
Raid Level 4 is nearly the same as RAID LEVEL 3 but rather than "Striping" across disks is operates at a sector level, You now have the better situation of both a simpler, less intensive demanding system and as well as good information reliability. In addition performance might be boosted as large information blocks can be written quicker due to more coordinated writing to the drives in smaller "sector" areas.
Lastly is RAID Level 5.
Raid level 5 is the same as the glorious RAID Level 4 except that instead of dedicating a single disk to storing the data the information stream is striped across all of the disks. You have greater performance with bigger trustworthiness for your PC systems.
A RAID setup may take some effort and training on your part.
Base your planning for your new RAID system on a careful analysis of your requirements.
What is critical in your current position now? Disk size capacities, info trustworthiness and integrity, performance or a combination or all.
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