Understanding Raid - bit-tech.net Forums

Da Dego · 11th Jun 2007, 05:27

http://www.bit-tech.net/hardware/200...tanding_raid/1

Have you always wondered about RAID? Not sure on the difference between 0,1, 10 and a can of bug spray? We de-mystify the numbers and performance.

If you liked it, Digg to share!

DarkLord7854 · 11th Jun 2007, 05:46

Was long reading, but well worth it. Good job

Tyinsar · 11th Jun 2007, 05:51

Well, I wasn't mystified by RAID - though I once looked forward to having a RAID 5 array - when I had only a single 80MB SCSI drive and started reading about computers. Actually I'd still be interested in RAID 5 if the cost for a decent controller wasn't so ridiculous.

Anyway - good article - hopefully it stops a few more people from putting valuable data on a RAID 0 or JBOD array.

zhangmaster12 · 11th Jun 2007, 06:18

really great "demystifier" demystified raid 4 me. thanks

Firehed · 11th Jun 2007, 06:31

Always wondered somewhat what RAID3 and RAID4 were, not that I ever really cared

Good read - I like these recent storage-esque articles, like the recent DIY home server one as well. Partly because I'm in the market, and partly because there's a distinct increasing need for stuff like that in the home for media whores like myself. Keep up the good work!

fungry · 11th Jun 2007, 06:35

excellent article. i consider myself a total RAID amatuer. the only thing that was shockingly confusing for my head was that exclusive OR thing. haha!

good stuff!

ZERO <ibis> · 11th Jun 2007, 06:57

Quote:

Originally Posted by Tyinsar

Well, I wasn't mystified by RAID - though I once looked forward to having a RAID 5 array - when I had only a single 80MB SCSI drive and started reading about computers. Actually I'd still be interested in RAID 5 if the cost for a decent controller wasn't so ridiculous.

Anyway - good article - hopefully it stops a few more people from putting valuable data on a RAID 0 or JBOD array.

I got my card for like $200 something a few years ago it even has expandable memory(got like 512mb in there right now). I will say that it is definitely worth it, I previously had a RAID 0 and after it failed I never wanted to lose my data again so I got 3 WD Rapters in a raid 5. It has run great for years and I never turn off this computer. I do however need more drives...

Hopefully I can save up for a 1TB

DougEdey · 11th Jun 2007, 07:14

Knew you'd get Tad to write it

r4tch3t · 11th Jun 2007, 07:26

Quote:

While you may not save hours, loading a map in Battlefield 2142 that few seconds quicker may make the difference of you nabbing the before anyone else gets to it!

The wha???

Quote:

One thing RAID1 should not be considered for is backups.

Filled me in on a few things, like RAID 3 and 4 and RAID 1 only supporting 2 drives, I thought it could be more, like having two redundant drives.

DLoney · 11th Jun 2007, 08:23

Great Read. Thanks.

Mister_Tad · 11th Jun 2007, 08:31

Quote:

Originally Posted by DougEdey

Thought you'd get Tad to write it

I kinda did

DougEdey · 11th Jun 2007, 08:34

Quote:

Originally Posted by Mister_Tad

I kinda did

I know, meant to write "Knew" altered to save you confuzling.

Mister_Tad · 11th Jun 2007, 08:36

Quote:

Originally Posted by DougEdey

I know, meant to write "Knew" altered to save you confuzling.

Ok, I get it...
I have yet to have my coffee, these things happen

Delphium · 11th Jun 2007, 08:55

Nice article, just as my own raid card dies in 2tb raid 3 mode

I can think of replacing it with something better.

I had also come across this page which shows quite nicely the differences between raids with some animation. http://www.acnc.com/04_01_00.html

Incidently if anyone can recomend a raid card that is known to work with vista, I would be happy to hear from you.
(something like 5-8port, sata-II, pci/pci-e)

Glider · 11th Jun 2007, 09:32

Great article, but I do miss some examples of RAID implementations (like some good HW cards, Soft vs Hardware RAID [I think Linux here

]),...

But nothing is perfect, and there's allways something somebody wants added

revlob · 11th Jun 2007, 09:35

Great article, but it would have been even better with some pointers on dedicated RAID controllers.

DougEdey · 11th Jun 2007, 09:37

The article is called "Understanding RAID" not "Implementing RAID"

DarkReaper · 11th Jun 2007, 10:57

Sequel plzkthx?

Edvuld · 11th Jun 2007, 11:58

I think that RAID1 isn't really a good security measure. Just because you got such an array set up doesn't mean that your data is safe. An external HDD that is unplugged from the computer when not used is way more secure.

From my experience, what has caused most data loss is HDD corruption either caused by bad drivers or Windows. RAID1 won't protect you against any of these

Nor will it protect you from lightning strikes, Viruses or Hackers. It will only protect you against a drive failure. I'm sure most readers are aware of this, but just in case someone's thinking about using RAID1, keep it in mind, so you don't stand there with your beard in the mailbox when your computer has catched on fire

Glider · 11th Jun 2007, 12:01

Edvuld, you are talking backups... RAID isn't backup... RAID is protection against Harddrive failure... Safe data is data on redundant array + a good Backup routine.

11th Jun 2007, 05:27	#1
Da Dego Brett Thomas Join Date: Aug 2004 Location: Cleveland, OH USA Posts: 3,906	Understanding Raid http://www.bit-tech.net/hardware/200...tanding_raid/1 Have you always wondered about RAID? Not sure on the difference between 0,1, 10 and a can of bug spray? We de-mystify the numbers and performance. If you liked it, Digg to share! __________________ "Frankly that seems overkill. iluvtrees2 arguing with spec is the intellectual equivalent of a bunny rabbit taking on a pissed-off lion." - Nexxo Last edited by Da Dego; 11th Jun 2007 at 15:46.

11th Jun 2007, 05:46	#2
DarkLord7854 Web Developer Join Date: Jun 2005 Location: West Palm Beach, Florida Posts: 3,832	Was long reading, but well worth it. Good job __________________ Current Computer: eVGA 780i Motherboard \| Q6600 Core2Quad \| eVGA GTX260 896Mbs 216-core \| 2x Seagate 500Gbs \| 8Gbs OCZ Platinum DDR2 800 \| Creative XtremeGamer X-Fi \| Thermaltake Armor Case Custom WordPress, ZenCart, Joomla, vBulletin, etc installs and skinning, PM/E-Mail for a quote

11th Jun 2007, 05:51	#3
Tyinsar 6 screens / 1 card Join Date: Jul 2006 Location: AB.CA Posts: 2,005	Well, I wasn't mystified by RAID - though I once looked forward to having a RAID 5 array - when I had only a single 80MB SCSI drive and started reading about computers. Actually I'd still be interested in RAID 5 if the cost for a decent controller wasn't so ridiculous. Anyway - good article - hopefully it stops a few more people from putting valuable data on a RAID 0 or JBOD array. __________________ It's not about how life treats you, it's about how you treat life.

11th Jun 2007, 06:18	#4
zhangmaster12 Hypermodder Join Date: Jun 2006 Location: New Jersey Posts: 870	really great "demystifier" demystified raid 4 me. thanks __________________ Project Dimension 2400

11th Jun 2007, 06:31	#5
Firehed Why not? I own a domain to match. Join Date: Feb 2004 Location: An hour north of Boston Posts: 12,576	Always wondered somewhat what RAID3 and RAID4 were, not that I ever really cared Good read - I like these recent storage-esque articles, like the recent DIY home server one as well. Partly because I'm in the market, and partly because there's a distinct increasing need for stuff like that in the home for media whores like myself. Keep up the good work! __________________ hire me @ eric-stern.com - web developer and php ninja pics @ my smugmug :: Twitter @firehed :: blog @ firehed.net 40D\|580EXII\|285HV\|AB800\|70-200f/4LIS\|17-50f/2.8\|150f/2.8Macro\|50f/1.8 MacPro @ 8x2.8GHz, 10GB FBDDR2, 3TB HD :: MBP @ 2x2.2GHz, 4GB DDR2, 320GB HD

11th Jun 2007, 06:35	#6
fungry Multimodder Join Date: May 2006 Location: Shanghai, China Posts: 200	excellent article. i consider myself a total RAID amatuer. the only thing that was shockingly confusing for my head was that exclusive OR thing. haha! good stuff!

11th Jun 2007, 07:14	#8
DougEdey I pwn all your storage Join Date: Jul 2005 Location: Southampton Posts: 13,933	Knew you'd get Tad to write it __________________ Burnout: Paradise Stats!XBL: DougEdey Bindi PSN ID: DougEdey Twitter Last edited by DougEdey; 11th Jun 2007 at 08:34.

11th Jun 2007, 08:23	#10
DLoney Multimodder Join Date: Feb 2005 Location: The Great State of TEXAS Posts: 208	Great Read. Thanks.

11th Jun 2007, 08:55	#14
Delphium You there computer man fix my pants Join Date: Mar 2007 Location: on teh interwebz Posts: 1,254	Nice article, just as my own raid card dies in 2tb raid 3 mode I can think of replacing it with something better. I had also come across this page which shows quite nicely the differences between raids with some animation. http://www.acnc.com/04_01_00.html Incidently if anyone can recomend a raid card that is known to work with vista, I would be happy to hear from you. (something like 5-8port, sata-II, pci/pci-e) Last edited by Delphium; 11th Jun 2007 at 09:01.

11th Jun 2007, 09:32	#15
Glider /dev/null Join Date: Aug 2005 Location: Belgium Posts: 4,102	Great article, but I do miss some examples of RAID implementations (like some good HW cards, Soft vs Hardware RAID [I think Linux here ]),... But nothing is perfect, and there's allways something somebody wants added __________________ There Are 10 Types Of People, Those Who Know Binary and Those Who Don't

11th Jun 2007, 09:35	#16
revlob Modder Join Date: Sep 2005 Location: UK Posts: 58	Great article, but it would have been even better with some pointers on dedicated RAID controllers.

11th Jun 2007, 09:37	#17
DougEdey I pwn all your storage Join Date: Jul 2005 Location: Southampton Posts: 13,933	The article is called "Understanding RAID" not "Implementing RAID" __________________ Burnout: Paradise Stats!XBL: DougEdey Bindi PSN ID: DougEdey Twitter

11th Jun 2007, 10:57	#18
DarkReaper Alignment: Sarcastic Good Join Date: Jan 2004 Location: Belfast, NI Posts: 1,750	Sequel plzkthx? __________________ Yeah, God could have created the Earth 6000 years ago with less than a blink, and set out all the evidence to the contrary just to confuse us. Personally I think that blowing up an entire universe on a timescale of billions of years to create the specific people He wanted has far more style

11th Jun 2007, 11:58	#19
Edvuld Multimodder Join Date: Aug 2005 Location: Sweden Posts: 222	I think that RAID1 isn't really a good security measure. Just because you got such an array set up doesn't mean that your data is safe. An external HDD that is unplugged from the computer when not used is way more secure. From my experience, what has caused most data loss is HDD corruption either caused by bad drivers or Windows. RAID1 won't protect you against any of these Nor will it protect you from lightning strikes, Viruses or Hackers. It will only protect you against a drive failure. I'm sure most readers are aware of this, but just in case someone's thinking about using RAID1, keep it in mind, so you don't stand there with your beard in the mailbox when your computer has catched on fire __________________ [Done] Beyond The Grave [Done] Temple Of NOD Supposed to be Homepage

11th Jun 2007, 12:01	#20
Glider /dev/null Join Date: Aug 2005 Location: Belgium Posts: 4,102	Edvuld, you are talking backups... RAID isn't backup... RAID is protection against Harddrive failure... Safe data is data on redundant array + a good Backup routine. __________________ There Are 10 Types Of People, Those Who Know Binary and Those Who Don't