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WD Raptor Raid 0 extremely slow

U

uuuaaaaaa

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Hi guys, I recently bought two WD740ADFD drives and I wanted to set them up in RAID0 to install windows 7, but I have never done anything like this before. I changed the controller to raid in the motherboard and then got into that special menu after the ROG logo to create raid arrays and I pretty much just assigned the two raptors to the raid 0 array and left everything default (the other 250gig drive was detected but I intend to leave it for my steam folder). The Raid 0 was created and then I installed windows 7 in it (had to feed it with the raid driver). The thing is the system is painfully slow, it takes something like 5min to book and when I am in windows the system is extremely unresponsive... I don´t know how to solve this, I have installed the latest AMD chipset drivers including that RaidXpert thingy.

I am really ignorant in this topic, so I need you to guide me through identifying and solving this problem.

Thanks in advance
 
Aquinus

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Did you test each drive individually or check SMART on either of the drives? One bad drive can make them both perform like garbage in RAID. I personally don't think AMD's chipset RAID is very good in comparison to nForce and Intel chipset raid, but it shouldn't be painfully slow.
 
Athlon2K15

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AMD RAID is terrible, if you want to use RAID buy a card.
 
Aquinus

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AthlonX2 said:
AMD RAID is terrible, if you want to use RAID buy a card.
Click to expand...
RAID 1 and 0 aren't really worth the cost of an external RAID card. No parity calculations makes doing them really easy and fast, even with the AMD chipset.

A cheaper and faster solution would be an SSD.
 
Athlon2K15

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uuuaaaaaa said:
Hi guys, I recently bought two WD740ADFD drives and I wanted to set them up in RAID0 to install windows 7, but I have never done anything like this before. I changed the controller to raid in the motherboard and then got into that special menu after the ROG logo to create raid arrays and I pretty much just assigned the two raptors to the raid 0 array and left everything default (the other 250gig drive was detected but I intend to leave it for my steam folder). The Raid 0 was created and then I installed windows 7 in it (had to feed it with the raid driver). The thing is the system is painfully slow, it takes something like 5min to book and when I am in windows the system is extremely unresponsive... I don´t know how to solve this, I have installed the latest AMD chipset drivers including that RaidXpert thingy.

I am really ignorant in this topic, so I need you to guide me through identifying and solving this problem.

Thanks in advance
Click to expand...

What stripe size you using? Also if I remember correctly Raptors were SATA 1.5Gbps drives.
 
newtekie1

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Run a speed test on the array using HDTune, preferably using a bootable media like Hiren's so the OS isn't effecting the results.

Raptors, especially the early ones, aren't really faster transfer speed wise. The 10,000RPMs helped far more with latency and that is why they felt faster than traditional 7,200RPM drives.

AthlonX2 said:
AMD RAID is terrible, if you want to use RAID buy a card.
Click to expand...

AMD RAID isn't that bad now. However, the SB750 southbridge on the OP's motherboard definitely wasn't that good at RAID. Though it was capable of RAID0/1 with decent enough performance(RAID0 at least would be faster than a single drive). But SB950 and the APU chipsets are actually pretty decent at RAID.

AthlonX2 said:
What stripe size you using? Also if I remember correctly Raptors were SATA 1.5Gbps drives.
Click to expand...

Correct, the plain Raptors were 1.5Gbps, the RaptorX was 3.0Gbps(some were 1.5), and the Velociraptor was 6.0Gbps. Not that it really matters since the Velociraptor barely breaks SATA 1.5Gbps transfer speeds.

However, that brings up a good point. The OP's drives are very old. They came out in 2007, so at this point the OP's drives are probably 6-7 years old. So I wouldn't be surprised if one, or both, are starting to have issues. Since the RAID array has to wait on the slowest drive, if one is having issues, the whole array will be super slow because it has to wait for the drive to respond.

Also, the OP's drives aren't exactly fast by today's standards. At best they managed 85MB/s reads, but they did do 8ms latency though.
 
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in the day and age where a 2560GB SSD with almost 700MBps read and 500MBps write can be had for a little over $100 who actually buys HDD's for anything other than mass storage?


Other than that can you post a screen shot of raidXpert showing the drives please?
 
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OneMoar

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try disabling write caching
 
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Thanks you so much for all the feedback guys!! I will look into benching the array with HDTune and ATTO. I am not sure if I will be able to do that today tho. Anyway I will report the results asap.

I bought the drives in second hand to build a nostalgic rig around my Abit IC7-MAX3 and X850XT PE, but since the raid array would perform better than my current HDD I thought why not give it a try? x)

UPDATE:

Benched the array with HDTune and got this:

Transfer rate
Minimum: 0.0
Max: 114.7

Acess time: 30.0ms
Burst rate: 12.5
CPU usage: -1.0%

After that I rebooted and got a SMART error in one of the drives, It seems that one of the drives is failing...
 
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