Sponsor Message:
Non Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
What Is A Raid Controller?  
User currently offlineDragon-wings From United States of America, joined Apr 2001, 3997 posts, RR: 0
Posted (8 years 3 months 3 weeks 21 hours ago) and read 1027 times:

A few days ago I disconected everything from my computer so I can clean the dust from the inside of the tower. Now when I turn on the computer it says new hardware is detected and to install it. In terms that a computer dummy would understand what is a RAID controller?


Don't give up don't ever give up - Jim Valvano
9 replies: All unread, jump to last
 
User currently offlineTedTAce From , joined Dec 1969, posts, RR:
Reply 1, posted (8 years 3 months 3 weeks 21 hours ago) and read 1014 times:

It kills roaches dead  Wink


http://www.tomshardware.com/2006/01/02/safer_6_for_raid_controllers/


User currently offlineMBMBOS From United States of America, joined May 2000, 2616 posts, RR: 1
Reply 2, posted (8 years 3 months 3 weeks 21 hours ago) and read 996 times:

Redundant Array of Independent Disks, RAID controllers are used to provide redundancy for mission-critical servers. So, if a hard disk fails, the server keeps running and no data is lost.

Don't know why your home PC would be looking for RAID, unless you purchased a very high-end PC or workstation.


User currently offlineRichardPrice From , joined Dec 1969, posts, RR:
Reply 3, posted (8 years 3 months 3 weeks 21 hours ago) and read 991 times:

A RAID controller is a bit of hardware that can handle writing the same data to multiple disks in a variety of different ways, usually independantly from the OS, and mask from the OS the failure of one of those disks.

RAID stands for Redundant Array of Inexpensive Disks, its a way of maintaining high availability (its available for use most of the time) on a storage solution without having to spend hundreds of thousands on a high availability storage solution OR its a way of increasing the speed of a storage solution without spending the money normally associated, OR its a way of doing both.

RAID works in different ways:

RAID 0 takes two disks and shares the data between them in stripes, making it look as tho the two disks are one big one, and increasing disk access speed at the same time, lose one disk and everything is lost.

RAID 1 takes two disks and mirrors them, everything on disk A also goes on disk B in an identical copy, lose one disk and the other one takes over.

RAID 5 takes multiple disks (usually 5), and uses a mixture of striping and parity to ensure fast access AND the ability to have one disk fail without losing information.

There are a whole host of other RAID levels, doing various interesting things at varying levels.


User currently offlineKaddyuk From Wallis and Futuna, joined Nov 2001, 4126 posts, RR: 25
Reply 4, posted (8 years 3 months 3 weeks 20 hours ago) and read 978 times:

Quoting MBMBOS (Reply 2):
Don't know why your home PC would be looking for RAID, unless you purchased a very high-end PC or workstation.

My hard disks run in RAID 0, because i've two hard disks that are treated as one...



Whoever said "laughter is the best medicine" never had Gonorrhea
User currently offlineDragon-wings From United States of America, joined Apr 2001, 3997 posts, RR: 0
Reply 5, posted (8 years 3 months 3 weeks 20 hours ago) and read 972 times:

Thanks for the explanations guys.

I do have two hard drives. Don't know if they are treated as one though. (my D drive is used for FS2004 and my C drive is for everything else)

Does anyone know what I should do now about the new hardware being detected?



Don't give up don't ever give up - Jim Valvano
User currently offlineTedTAce From , joined Dec 1969, posts, RR:
Reply 6, posted (8 years 3 months 3 weeks 20 hours ago) and read 968 times:

Quoting MBMBOS (Reply 2):
Don't know why your home PC would be looking for RAID, unless you purchased a very high-end PC or workstation.

Most 'newer' SATA MOBO's have it. Considering most people are still buying PATA, it goes ignored.


User currently offlineRichardPrice From , joined Dec 1969, posts, RR:
Reply 7, posted (8 years 3 months 3 weeks 20 hours ago) and read 964 times:

Quoting TedTAce (Reply 6):
Most 'newer' SATA MOBO's have it. Considering most people are still buying PATA, it goes ignored.

Its been a standard feature on all PATA mobos that cost more than a buck fifty for about 4 years.

I dont trust any of these onboard ones tho, they arent worth the silicon they come on. Once the OS is booted, all the hardware functionality is handed over to the drivers and its done by software.

Quoting Dragon-wings (Reply 5):
Does anyone know what I should do now about the new hardware being detected?

Its possible that it was detected earlier, you jsut didnt notice. When you undid everything, you probably changed the order of something when you plugged it all back in again - this will force Windows to redetect everything, prompting for stuff you havent already got drivers installled for.


User currently offlineCfalk From , joined Dec 1969, posts, RR:
Reply 8, posted (8 years 3 months 3 weeks 20 hours ago) and read 960 times:

Quoting RichardPrice (Reply 3):
RAID works in different ways:

RAID 0 takes two disks and shares the data between them in stripes, making it look as tho the two disks are one big one, and increasing disk access speed at the same time, lose one disk and everything is lost.

RAID 1 takes two disks and mirrors them, everything on disk A also goes on disk B in an identical copy, lose one disk and the other one takes over.

RAID 5 takes multiple disks (usually 5), and uses a mixture of striping and parity to ensure fast access AND the ability to have one disk fail without losing information.

Richard has summerized it perfectly.

Many PCs and notebooks sold today (including mine) have a RAID 0 setup. My laptop has 2 60 GB drives coupled into a RAID Array so that it looks and acts like a single 120 GB drive. I suppose they do that because two 60 GB drives would be cheaper than a single 120 GB drive, or maybe they could not get a 12 GB notebook drive at the time.

In normal use, RAID is completely invisible. But there is a downside, which I had the misfortune to run into once. Unlike a normal hard drive, which can be read by a computer's BIOS firmware, a RAID array needs drivers. So if you have a major crash, standard disk-recovery methods won't work. It's a good idea to have a rescue disk set up with the RAID drivers and appropriate utilities in order to access your files in case of disaster.


User currently offlineDragon-wings From United States of America, joined Apr 2001, 3997 posts, RR: 0
Reply 9, posted (8 years 3 months 3 weeks 20 hours ago) and read 960 times:

Quoting RichardPrice (Reply 7):
When you undid everything, you probably changed the order of something when you plugged it all back in again - this will force Windows to redetect everything, prompting for stuff you havent already got drivers installled for.

I guess that what happened cause when I plugged everything back in I did not do it in the order I un-plugged them. I didn't know that mattered.

So should I just ignore the new hardware detected message?



Don't give up don't ever give up - Jim Valvano
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Help - What Is File Shadowing? posted Tue Dec 12 2006 19:23:18 by Vio
What Is This. . . .? (Weird Google Earth Image) posted Tue Dec 12 2006 08:13:53 by Springbok747
What Is Your Personality? posted Thu Dec 7 2006 01:29:43 by KaiGywer
What Is This Residue From My Watch? posted Fri Dec 1 2006 20:28:17 by FSPilot747
What Is Scientology? posted Sat Nov 18 2006 22:14:52 by 9V
When You're Stressed, What Is Your Escape? posted Tue Nov 14 2006 13:08:34 by Itsjustme
What Is Arizona Thinking? Diamondbacks New Jerseys posted Thu Nov 9 2006 03:37:05 by Piercey
What Is The Price Of A Life? posted Mon Oct 23 2006 17:53:19 by PlymSpotter
CO AMC Gremlin, What Is With It? posted Sun Oct 22 2006 14:31:07 by Falstaff
What Is This Crap Music? Muse? Rant! posted Sat Oct 21 2006 21:29:34 by Speedbird747BA