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Old 05-01-04, 04:01 AM   #1
bothanspy
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Raid---How does it work

Quote:
Looks good to me. I'd have gone for a different case but thats just asthetics. Hopefully you have 2 hard drives that you can raid 0 and get some screamin performance from them. Don't forget to grab the raid driver from ASUS website if you do do that for the XP setup...that first part where it says press f6 to install 3rd paty raid.
SilverSurfer posted this before. How does Raid work? Do I have to have exactly the same hard drive, or the same size, or the same manufacturer, or a combination of the above?

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Old 05-01-04, 07:46 AM   #2
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AFAIK, you have to have 2 of the same drive, I never tried setting it up with two drives with different mfgrs, but same size - doubt it would work...

Basically - it works by making one large volume out of the two drives and alternating which one it writes data to so that it speeds up the read/write access. I don't like RAID because if one drive has a physical failure, you pretty much lose the data on both drives. It happened to me with a machine I bought from Alienware. If you want really fast performance, you can check out the 10000rpm ata drives available - last I saw they had 74gb versions.
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Old 05-01-04, 08:34 AM   #3
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See buy. Spray bug. Raid kills bugs dead!
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Old 05-01-04, 09:12 AM   #4
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IDE RAID 0 generally works with different size drives from different manufacturers, but I wouldn't recommend it.

You will only get the capacity of 2x the smallest drive and performance will be held back somewhat if one drive is slower than the other or if their timing characteristics are different.

RAID 0 stripes the data across the two drives which means they read and write data in parallel and both are needed to recover the data. Therefore if one drive goes out the other is useless data-wise. With two drives there is a higher chance of something going wrong than with one drive.

RAID 0 may not give much of a performance boost at all on the normal consumer IDE motherboard. I've seen figures showing it's faster and ones showing it's slower. It's probably not worth the cost.

You must have a good backup method if you use RAID 0. I do and I have two 10K RPM Raptor drives in a RAID 0 configuration. It's fast, and faster than my other decent drives, but the Raptor is very fast all by itself. If I had one of the drives go out on me I would probably convert to RAID 1 (mirrored drives) when I rebuilt the array.
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Old 05-01-04, 01:57 PM   #5
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There are various different RAID levels. Each has advantages and disadvantages.

Short summary:
RAID0 gives you generally the highest performance, but no security: if one drive goes down, you lose all your data

RAID1 gives you a lower performance than a single drive, but excellent redundancy. Basically all data is copied to 2 drives, so if one of those drives goes down, you don't lose a shred of data

RAID5 gives good read performance, but poor write performance. Excellent for read-intensive applications. It also offers a good level of security: any single drive in the array can go down, and you don't lose any data. If 2 drives go down at the same moment, you lose everything...
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Old 05-01-04, 02:44 PM   #6
johnglass
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Quote:
Originally posted by LolaRennt
There are various different RAID levels. Each has advantages and disadvantages.

Short summary:
RAID0 gives you generally the highest performance, but no security: if one drive goes down, you lose all your data

RAID1 gives you a lower performance than a single drive, but excellent redundancy. Basically all data is copied to 2 drives, so if one of those drives goes down, you don't lose a shred of data

RAID5 gives good read performance, but poor write performance. Excellent for read-intensive applications. It also offers a good level of security: any single drive in the array can go down, and you don't lose any data. If 2 drives go down at the same moment, you lose everything...
I think I would replace 'security' with 'redundancy', but other than that
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Old 05-01-04, 03:10 PM   #7
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And I don't think I'd say RAID 1 is lower performance. It may be a bit slower on writes but it's faster on reads.
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Old 05-01-04, 03:14 PM   #8
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Quote:
Originally posted by johnglass
I think I would replace 'security' with 'redundancy', but other than that
I think I'd replace the word redundancy with fault tolerance
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Old 05-01-04, 06:17 PM   #9
johnglass
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Quote:
Originally posted by jrobinson
I think I'd replace the word redundancy with fault tolerance
You're being redundant.
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Old 05-01-04, 07:07 PM   #10
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I think I'd replace fault tolerance with ice cream
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