Western Digital's Raptors in RAID-0: Are two drives better than one?
by Anand Lal Shimpi on July 1, 2004 12:00 PM EST- Posted in
- Storage
Overall System Performance - Winstone
Historically, one of the most disk bound system performance tests has been the Winstone suite, composed of two benchmarks: Business Winstone 2004 and Multimedia Content Creation 2004.Business Winstone 2004 tests the following applications in various usage scenarios:
- Microsoft Access 2002
- Microsoft Excel 2002
- Microsoft FrontPage 2002
- Microsoft Outlook 2002
- Microsoft PowerPoint 2002
- Microsoft Project 2002
- Microsoft Word 2002
- Norton AntiVirus Professional Edition 2003
- WinZip 8.1
With only a 20% boost in pure IO performance, we weren't expecting much from the real world business performance of RAID-0 - and we weren't greeted with any surprises. Migrating to two Raptors in RAID-0 resulted in a 3.6% performance improvement; definitely not worth the added cost of a second drive as well as the decrease in reliability.
Multimedia Content Creation Winstone 2004 tests the following applications in various usage scenarios:
- Adobe® Photoshop® 7.0.1
- Adobe® Premiere® 6.50
- Macromedia® Director MX 9.0
- Macromedia® Dreamweaver MX 6.1
- Microsoft® Windows MediaTM Encoder 9 Version 9.00.00.2980
- NewTek's LightWave® 3D 7.5b
- SteinbergTM WaveLabTM 4.0f
Although we saw a bigger theoretical performance improvement with Content Creation Winstone 2004 in our IPEAK tests, the real world improvement is even smaller than in the previous test; 2.6% is the only benefit that RAID-0 will give you here.
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Insomniac - Thursday, July 1, 2004 - link
I was wondering how RAID1 reads back data. I thought if it was smart, it would use both drives and improve performance. If that wasn't the case, I wondered if you could choose which drive it read from. That way, you could get a WD Raptor II and a low cost 80GB hard drive to pair up. You get the redundancy and speed of the Raptor for a lower cost. What about RAID5? (I know the ICH5/6 doesn't support it, but I thought there were some chipset m,akers that did. I would like to see what that brings to the mix. Given the choice right now, I'd take redundancy over performance. Maybe RAID 5 can give you both for less than 0+1.Pollock - Thursday, July 1, 2004 - link
I really wish some regular 7200 RPM drives had been used, considering someone who can afford a 74GB Raptor won't care about the costs of RAID anyway. =P Besides, to me it seems like Raptors already perform so well that it's hard to find any performance gain anyway. I was also under the impression that a lot of people with SATA drives in RAID 0 were actually getting much more noticeable performance gains; i.e. outperforming lone Raptors. Well, whatever.goku21 - Thursday, July 1, 2004 - link
I noticed that they came to the conclusion of only using 2 drives in a RAID setup, but in my expereince the more drives the supposed increase in performance. Perhaps they should revisit this with 4 Raptors in a RAID setup.kuk - Thursday, July 1, 2004 - link
Just one small thingy ... why is the manufaturer stated in the article summary "3Com/U.S. Robotics"?parrybj - Thursday, July 1, 2004 - link
While your overall disk bound throughput may be higher, seek times are sill only as fast as the slowest drive in the array. Since seek time is a more important desktop performance metric, I would think there would be very little benefit to doing this.Marlin1975 - Thursday, July 1, 2004 - link
Well the review was nice if you are thinking of running 2 raptors on a ICH5/6 SATA ports, but what about the other 99% of use that may use VIA, SiS, etc.. and/or other 7200 rpm hard drives?Matthew Daws - Thursday, July 1, 2004 - link
I'd be interested in seeing how using RAID0 with older drives, or one old drive and a newer drive, works out. If you're upgrading your motherboard, then given that RAID comes "for free", it could be a good way to save money by buying a second, smallish hard-drive, and using your old hard-drive with this new one in parallel...parrybj - Thursday, July 1, 2004 - link
Very good article. The results are not surprising. I have one comment about RAID1. While in theory it is simply a data redundancy mechanism, in practice there are performance benefits. Any good RAID1 algorithm will use read optimizations that will allow for parallellism during read requests. Thus, under the right conditions, most RAID1 arrays will achieve higher read IOPS than a single drive. Also, there may be a performance hit on writes due to the fact that writes will only be as fast as the slowest drive.djm2cmu - Thursday, July 1, 2004 - link
#4: Excellent introduction to all the common RAID levels here: http://www.acnc.com/04_01_00.htmlnofuse - Thursday, July 1, 2004 - link
This article doesn't seem to be up to the standards I've come to expect from Anandtech.It would be more fair to say "Intel's onboard RAID 0 solution offers no performance gain." I'd be interested to see results from other RAID controllers. You can't take one product and make a blanket comment like "RAID 0 is not worth it." That would be like me reviewing an NVIDIA Vanta graphics card and saying "3D acceleration is not worth it."