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Poll:Which SATA HDD is best for RAID0? - Page 5

Poll Results: Which SATA drive is fastest in RAID0?

Poll expired: Jan 3, 2007  
  • 1% (1)
    Seagate Barracuda (regular)
  • 8% (7)
    Western Digital Caviar
  • 34% (27)
    Seagate Barracuda Perpindicular
  • 52% (41)
    Western Digital Raptor
  • 0% (0)
    Maxtor DiamondMax
  • 2% (2)
    Samsung SpinPoint
  • 0% (0)
    Hitachi DeskStar
78 Total Votes  
post #41 of 56
Thread Starter 
http://www.anandtech.com/printarticle.aspx?i=2690 That's a "must read" article that fully benchmarks and explains the Raptor and why it kicks some serious butt.

BTW NCQ causes a serious decline in performance when using a single drive.
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post #42 of 56
That is the exact article that sold me on Raptors
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post #43 of 56
Thread Starter 
Althought the Samsung SpinPoint does have excellent burst rates and is very cool and quiet...
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post #44 of 56
Thread Starter 
Okay I ran HD tach on three of my rigs just to see.

No surprise to me the Intel Controller faired the best

On the NF3 board 2 x 80 GB WD Caviar 8MB cache SATA150 in RAID 0:
117.9 Burst Random Access: 14 ms Average Read: 96.6

On the NF4 board 4 x 74GB WD Raptor 8 MB Cache SATA 150 in RAID 10:
Burst: 120.8 Random Access: 8.4 ms Average Read: 102.9

On the P4P800SE ICHR5 2 x 250GB WD Caviar 8MB Cache SATA150 in RAID 0:
193.6 Burst Random Access: 13.3 Average Read: 99.8

I have another NF4 with two SATA in RAID 0 also but it is torn down ATM.

I have yet to set up some single drives--hope to have some time for that tomorrow. As you know it is not the HW that is time consuming--it is loading that damned SW...
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post #45 of 56
One of my U320 15,000rpm SCSI drives almost matches your caviar raid-0 setup. It gets (Red is 2 disk raid0):
Burst: 237.2MB/s (226.7MB/s)
Random access: 3.4ms (3.6ms)
Average Read: 88.7MB/s (172.6MB/s)

I used to have 2 WD Raptor 150's in raid-0, but got rid of them to try something new (SCSI). The raptors I couldnt breach past 125MB/s on the read and access time was about 9ms I think. My motherboard used a Marvel SATA controller so I probably didnt get the best performance outta them in raid. They are dependable drives and they got my vote over the seagates (If speed is what you want).

If your lucky, for the price of 2 raptors you could possibly get 2 15K SCSI drives off ebay. You would still need a controller and cable, but the performance is worth it IMO.
post #46 of 56
Thread Starter 
Quote:
Originally Posted by B33m3RBOY View Post
One of my U320 15,000rpm SCSI drives almost matches your caviar raid-0 setup. It gets (Red is 2 disk raid0):
Burst: 237.2MB/s (226.7MB/s)
Random access: 3.4ms (3.6ms)
Average Read: 88.7MB/s (172.6MB/s)

I used to have 2 WD Raptor 150's in raid-0, but got rid of them to try something new (SCSI). The raptors I couldnt breach past 125MB/s on the read and access time was about 9ms I think. My motherboard used a Marvel SATA controller so I probably didnt get the best performance outta them in raid. They are dependable drives and they got my vote over the seagates (If speed is what you want).

If your lucky, for the price of 2 raptors you could possibly get 2 15K SCSI drives off ebay. You would still need a controller and cable, but the performance is worth it IMO.
Not sure which mobo or controller you are using but the SCSI drives I have (u320 36GB Cheetah) and the controller (LSI u320 RAID) were giving me absolutely terrible performance on the PCI bus in RAID1--about 2.2 mb/s average read....
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post #47 of 56
hmmm I dont know where to begin on your read problem there. That is a disaster on U320 drives. I use a Adaptec 29320lp-r PCI-X controller on a Asus P5WDG2-WS Pro board. Controller is used in a REAL 133mhz PCI-X SLOT (PCI-X is not PCI-E). I used to have a LSI 21320R controller and it gave the same performance as the Adaptec. The bios on the adaptec however was easier to configure IMO. Go into the controller bios and make sure the card is negotiating a U320 transfer speed across the chain. If it isnt, you got a problem somewhere in the chain. 2.2MB/s sounds like SCSI-1, not U320.

By using a U320 card on a normal PCI slot, I think your limited to 160MB/s. Your not even close to that so I think you have a problem in the SCSI chain, most likely the cable or the adapters if you use them. Make sure the cable you are using is certified for U320 transfer speeds and that your adapters are the same. If one is off, it downgrades the entire chain to lower speeds.

Another common mistake comes to mind (so common I even did it myself when I first got my drives). U320 drives are either LVD or SCA. Now on older SCSI drives, they self terminated the SCSI chain. When they came out with the U320 drives, to get the highest signal quality through the cable, they took that completely out of the drives. So now with 2 U320 drives in a SCSI chain, if you want to do raid you need a 3 drive SCSI cable with a U320 terminator in the third slot. If you are using a 2 drive cable like I did, the drive on the second slot would malfunction in the chain getting errors such as "write delay failed" and it would create system stability issues until you restart. This could also be the possible problem for you.

From what I've experienced with SCSI, it isnt very forgiving on mistakes. But as soon as everything gets up and going, with 2 15k drives, you should have comparable performance to a 4 disk SATA raid0 array.
post #48 of 56
Thread Starter 
Appreciate the refresher course--however you did not cover any new ground for me--I have another SCSI rig running an LSI U160 that performs well. And I have a twisted pair u320 ribbon cable with 4 terminals and two drives and a terminator so that should not be an issue. Now I have had a lot of trouble finding proper backplane adapters--so that might be an issue. The fellow who sold the gear to me neglected to include the driver CD and the ones on the LSI site are not complete. I believe I may also have to upgrade te frmware anf flash the HBA.

It's really not worth the trouble at the moment as I have so many other projects.

A real; shame because I know the Cheetahs are good drives...

Thanks for the help!
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post #49 of 56
For U320 backplanes, I go on ebay and buy from seller: mcpricebreakers. He offers a 5 year warranty with them. I've bought 6 68->80 adapters off him so far and they all check out at correct speeds. Never had one that didn't go U320. Try him.

As for the drivers, I had problems finding the correct LSI drivers as well. My problem was more because the seller didn't list that the card he sold me was HP Proprietary. Hate it when dumb sellers sell computer parts on ebay . One of the reasons I got a refund and went for a Adaptec card.
post #50 of 56
Thread Starter 
Quote:
Originally Posted by B33m3RBOY View Post
For U320 backplanes, I go on ebay and buy from seller: mcpricebreakers. He offers a 5 year warranty with them. I've bought 6 68->80 adapters off him so far and they all check out at correct speeds. Never had one that didn't go U320. Try him.

As for the drivers, I had problems finding the correct LSI drivers as well. My problem was more because the seller didn't list that the card he sold me was HP Proprietary. Hate it when dumb sellers sell computer parts on ebay . One of the reasons I got a refund and went for a Adaptec card.
I would not be surprised if it was something like that.

Thanks again. I have had excellent luck with SCSI4Me on eBay.

The seller has promised to send me the CD for about a month now...I dunno what to think--sheer laziness?
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