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post #11 of 24
Damn, and I was considering raid 0. Guess I'll go raid 0+1 when i get my second max diamond
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post #12 of 24
4xraid-0 is absurd fast in many situations, and always way faster than one disc.
Raid-1 (2 discs) is just as fast as one.
Raid-0+1 (4 discs) is roughly as fast as 2xraid-0,hence you have 2 set of Raid-0 mirroring each other.
Raid-0+1 (3 discs) reads from the discs almost or the same as Raid-0. However it writes only as fast as one.

I hope I understood your Q's right. Else let me know.

If you ask me, go with the speed, and store regular backups outside the raid array. You can have it done automaticly.

Hint: You can easily run a 3xRaid-0
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post #13 of 24
It would be a pain in the ass if one did happen to fail, just in re-installing everything. I could ghost the array after I get it setup.

I did see benchmarks with a 3 drive raptor raid-0 setup and the difference between that and the 4 drive setup wasn't much, probibly not worth the extra money because I would have to buy the last raptor for the full price. Still, is the raid-0 setup with all the files you want to with the crazy perfromance definately better than splitting the OS files and data file on two arrays?
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post #14 of 24
Quote:
Originally Posted by Skipper
4xraid-0 is absurd fast in many situations, and always way faster than one disc.
Raid-1 (2 discs) is just as fast as one.
Raid-0+1 (4 discs) is roughly as fast as 2xraid-0,hence you have 2 set of Raid-0 mirroring each other.
Raid-0+1 (3 discs) reads from the discs almost or the same as Raid-0. However it writes only as fast as one.

I hope I understood your Q's right. Else let me know.

If you ask me, go with the speed, and store regular backups outside the raid array. You can have it done automaticly.

Hint: You can easily run a 3xRaid-0
From what I understand, the more HDDs you have in the RAID 0 array the faster-- hence 300-400 mb/s burst rates.

RAID 1 supposedly writes faster than RAID 0--and RAID 0 reads faster than RAID 1-- so I would thing 0+1 would be ideal for a desktop PC--but I have no first hand data on this.

I can tell you that from my perspective this "RAID 0 is risky" stuff is off base. If you are running a single HDD and it fails you lose your data---think of RAID 0 as a single HDD--it takes the "risk" out of the picture. Similar deal with Windows Dynamic Disk--it acts like one big HDD.

Whatever files I cannot bear to lose I already have burned to DVD--sure I might lose some very recent files--but as this is not a business PC, but an OCed Over-Volted, Water-Cooled Hot Rod, risk is pretty much part of the deal...

I would agree with Skipper's original response--use 4 40 or 80 gig HDDs in an aray and it will smoke a raptor for less money. Skip the RAID 1 routines unless you have a lot of extra money--it will take 2 HDDs in RAID 1 to cover 1 RAID 0 HDD--meaning you will need 3 or 6 identical HDDs to run a RAID 0 setup. In RAID 0+1 you have the best of both worlds and the expense of extra HDDs--for a business ro a server I would go even further and use some proprietary RAID array to protect, encrypt and backup the data--but for a home PC I would think RAID 0 is the biz.
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post #15 of 24
I understand the risks involved with the different setups and how they operate. I do not however, know the actual realtime speed differences between the speeds mentioned above.

I got the raptors for around $80/pcs so the price wasn't an issue.. Is the 4drive raid 0 setup worth the risk if two raid 1 arrays or (1) raid 0+1 setup is just minimally slower? For me I'm just doing games and webdesgn/programming/animation. I have plenty of off array storage otherwise thats why I am more conserned about the difference in speed of the 3 setups.

The 4 drive Raid-0 will be screaming fast, someone recommended the (2) raid-1 arrays instead of the raid-0+1 array because he said there would be a bottleneck in reading OS files with gaming files on the same array and the 2 array setup would be better...is this true? The raid-0 is pretty tempting if it is that much faster and I could use it just for games and programs that aren't of importance
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post #16 of 24
Ok I will try to explain. I will throw in som indexnumbers, that is not real, but will give you an idea of it.

First the basics:

Raid-0/Stripping. This it where you run 2, 3 or 4 discs as one bigger and faster disc.

Raid-1/mirroring. This is where you mirror your data from one disc to another. If you use the same number and type of discs on the (0) side, as on the (1) side, there is almost no diference in performance for your discs on the (0) side.

Remember the (1) discs will never add anything but data safety.

If you use an uneven number of discs (three) then the disc that is set for mirroring(1) will determine the write speed of your first two discs, wich you then have in Stripping mode(0)

So,with your 3 discs you have two options:

3 discs in raid-0. You get the full efect of all 3 discs. Read/Write = 300%
2 discs in raid-0. and the last mirroring them (the +1).Read=180-200%, Write100%

If you have bourght a fourth disc then:

2 sets of 2xRaid-0. The one mirroring (1) the other. Read/Write = 200%
4xraid-0. Read/write = 400% (if your controler can handle it. Some can't handle the amount of data, and provide less than actual 3x and 4x speed.)

My advise is this.

Make some regular Ghost backups. Go for 3xRaid-0. Do some testing. If you then think your controler can handle it (if it tripples(or close to it) the speed) then you can add the fourth disc, if you feal you need it. Remember the step from three to four discs, only has a theoretical extra relativ performance of 33.3% to add. ie. (300%-400%), and you are already way above any bottleneck in the system, so you might realisticaly seen not notise any big difference. And hey! 3xraid-0 is also extremely fast. You can almost compare the data transfer rate of souch a system to that of a solid state memory disc like Ramdisk or I-ram.

You might also want to wait a couple of days. I'm in the process of testing this:

1 singledisc
2xraid-0
3xraid-0
4xraid-0

The discs I'm testing, perform rather close to the raptors, so you would be abel to draw some comparisons.

You can follow the progress here:
http://www.overclock.net/hard-drives...knowledge.html
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post #17 of 24
Thanks for the help. I think I might go with a Raid 0+1 setup, the speed increase isn't worth it if something would happen to the 3 or 4 drive raid 0 array, and after all, I wanted a setup that wouldn't crash like my older one.

My experience with Maxtor has been terrible, I don't think I would buy another drive from them.
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post #18 of 24
Thats not how you do it.

You let one disk mirror the other, if using two disks.

If using four, you create two Raid-0 stips, and let one mirror the other.

If you want to know the speed diferences between diferent drives, then reed up on the treat in my Sig. It's about speed of different raid setups. I'm adding 2xRaid-o and4X raid-0 sometime within the next 24 hours. Allready did the testing, just have to do the writing.

But to answer you short. 0+1 4 disks, vs. 4 disk raid-0 the latter has a theoretical potential of being twice as fast as the first.

Anyway, read up, and you will know.
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post #19 of 24
Thanks, that was kinda what I was looking for. The speed difference between the two so I could decide what option to choose.
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post #20 of 24
Quote:
Originally Posted by Lilwheezy75
Im in the process of a new build and im realy confused on a good HD setup. I was planning on 1 74 gb raptor, i dont have the money for 2 of them. Is there a better setup i can get? I want good speed, boot and load times with good storage. I currently have a 40 gig hd so the 74 should be fine. But more is better.

Would i be better off getting 2 HD and setting up in Raid 0 (im not too clear on raid yet) but i hear its good? ANd whats a good HD for the job?

the comps going to be used daily for music, gaming, and internet ... maybe minor OC
if i was you (in a case im similar) i would get the raptor and just bu ya secondary 300gb in the future, my setup now is a 74Gb raptor (primary) and a 300gb 16mb buffer (secondary)
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