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VelociRaptor vs multiple SATA

D

Dreadfull

n00b
Joined
Jun 16, 2008
Messages
9
Hi all, anyone can tell me what should be the difference in speed between these:

2xWD VelociRaptor 300GB @ RAID 0
4xWD Caviar 500 GB RE2 @ RAID 0

from http://www.hardforum.com/showthread.php?t=1313337 i see that a single VelociRaptor has an average speed of ~104MB/s and two of those @ RAID 0 should reach ~ 201MB/s
Ok then, what about WDC 500 GB RE2 ? From my memories they have an average of about 60 MB/s right ?

So who would win ? 2xVelociRaptor or 4xWDC RE2 ?
 
Speed vs speed = I would think the Raptors would still come out on top.

However, if you factor in price/storage/speed vs price/storage/speed, the 500's dominate the Raptor's face.
 
Shambler said:
Speed vs speed = I would think the Raptors would still come out on top.

However, if you factor in price/storage/speed vs price/storage/speed, the 500's dominate the Raptor's face.
Click to expand...

yes but the raptors have a 3 times faster acess time
 
Ive found raptors to not be that much fast in actual use, yea the specs are faster but its hard to notice.
If you need storage go with the 500's, but if you want speed go get a 300gb 15k SAS drive thats what i use and they are blistering fast.
 
What about a nice happy medium in speed/price/performance: Snag the 640 Gig WD, or 4 F1's. Supa fast, nice price to storage ratio as well. Grab 4 and be happy man! /Jamaican accent

However that many drives on a Raid 0 is super extra scary unless you are backing up to a NAS or another machine. Cause, 1 bad drive/sector can make for a really bad day. What about 4 640's in Raid 5? Giving you mega storage, great pricing for the storage, decent speed, + data backup/raid protection. If a drive dies, you can still function, toss in another 640 and build that drive back up.
 
didn't see those hdd's in any store in my country :|
the idea with the SATA drives was 6 500 GB RE2's @ RAID 10 ... speed+mirroring

nitrobass24, what Raptors are you refering to ? Yes, the Raptor itself isn't so fast, Raptor X is faster and VelociRapter is on top of all, at least this is what i saw on all benchmarks when "using google"

Ok ... suppose i need the fastest combination of hdd's (don't care if it's SAS/SATA/SCSI) @ ~300 GB wich cost max 550-600 E, what do you recommend ?

Later edit: I saw your signature and i'm buying something similar, 2 x Intel Xeon Quad-Core E5420 (2.5 GHz), 16 GB DDR2 667Mhz .. etc. What's your average speed on those SAS hdd's you have in raid0?
 
I'm at work right now and i have ran HDTune on it, but I will do that when I get home for you and let you know.
BTW my sig is a lil off, I dont have them in a raid0 anymore im just using the two as single drives one for boot, and one for video editing/transcoding. Its a lil slower than using them together in raid0 but its not noticeable, it also makes my backups to my NAS easier.

Let me ask you a few questions so we can help you better.
What exactly are you trying to accomplish? Is this for a nas, workstation, server?
What is this space going to be used for? Datafiles, database, backups?
I understand your budget to be 500euros? How much space do you need/want?
 
What are you using your array for? RAID 0 can increase transfer speeds considerably in certain scenarios, but in terms of general consumer/gamer performance, low access times mean a quite a lot. I would much rather take the vraptors.
 
500 euros for the hdd's i mean :) the total budget is about 2600E.
I'm making a server wich should do many different things as I don't wanna use multiple computers (this means less power consumption/noise/wasted space etc).
It should do this:
Hosting: game-servers (counter-strike/warcraft etc), websites, databases, mail, domains ..
Other: lan server/router/proxy server etc ..
I don't need THAT much space, I need at least 300 GB and 600 would be enough so I'm strongly thinking of two 300gb vraptors (great access times/very good speeds).
Maybe a good solution would be 2x vraptor @ RAID0 + another one for mirroring (if possible - i saw setups with 4/6/etc but not 3)
Btw, what PSU would i need for 3 vraptors + 16gb ddr2 + two quad-core xeons ?
 
Dreadfull, for a server that you want to perform all those functions and since you have set aside 500e for hdd's i would grab a couple of 15k SAS drives, I like the Seagate Cheetahs personally, these drives are more expensive than raptors but they are designed to be run 24/7 for enterprise environments(also are great for databases).
These drives are awesome i just bought two more 147gb Cheetah's and im going to do a raid5, i cant for them to get here.

BTW i havent forgotten about the hdtune screenshots of my sas drives but when i got home my video encoding was still going, actually it still is right now, but when its done ill run some test and post them for you.

Also tomshardware has HDD charts that have all sorts of benchmarks, here is the link for the enterprise drives.
 
Storagereview.com has some benchies too. Check them out for drive marks...
 
thanks but hmm ... i'm totally lost now
(from tomshardware) why would a Seagate Cheetah / SAS / 10.000 rpm be faster than a Seagate Cheetah / SAS / 15.000 rpm ?!
results from h2benchw say that WriteTransfer Performance on those is 75-80 MB/s (VelociRaptor @ hdtune had 104MB/s, saw here, on this forum)
bad thing there are not so many products in that list (from that link) but i'll dig more :)

check out this:
http://www.storagereview.com/php/be...&numDrives=1&devID_0=321&devID_1=360&devCnt=2
there's a very small difference in the favor of Seagate from what i see, yes, i saw it's SCSI not SAS ... heh, that's all i could find there
and about the prices ... well .. the Cheetah @ 146 GB (SAS) costs with 30E less than a 300GB VelociRaptor (i admit, i'm a WD fan)
I can't tell about stability on 24/7 but .. had many servers with WD and none, ever, died in 4 years
Also, WD has 2-3 times less energy needed than Seagate, less noise etc ..
Don't know, i never liked seagate and never had one, you tell me why is it better cause i really don't know
So .. waiting for the pics :) thanks

Later edit: Can someone tell me please wich MB is better between Intel S5000PSLROMBR and Asus DSBF-D12/SAS ? and why ?
 
I think you may have read the chart wrong.
Or were comparing different drives.
The 10K drives perform better than some of the 15k drives due to increased onboard cache.

Access times:
random-access-time,713.html


As far as brands go, I guess it all ends up being preference, or sometimes price. But WD does not currently offer 15k drives, Seagate, Hitachi, and Fujitsu are the ones I'm familiar with. I just happen to be extremely happy with the SG's that ive had in the past, on that same note i have 3 74gb raptors that are pretty old and still working great.

As far as heat, noise the faster the hard drive 5400,7200,10k,15k as those go up so do all the other factors. For servers i dont really worry to much about noise, because they are not sitting on my desk their in a closet or something. Heat is always a factor but an increase in heat from 15k drives will be negated by your 2xquad core cpu's, and FBDIMM's. Those things put out the heat, when i first built my rig it was my first dually and i had never used fbdimms i went to pull the memory it burned my fingers it was so hot.
 
canislupy said:
It looks like you may also be confusing Write and Read performances.
Click to expand...

Well...tomshardware.com says this:

Seagate Cheetah 15K.4 (SAS, 147 GB,8MB,15000rpm):
Averate Read Transfer Performance: 75.00 MB/s
Averate Write Transfer Performance: 72.80 MB/s
Maximum Write Transfer Performance: 89.20 MB/s
Random Access Time: 5.80 ms

Western Digital VelociRaptor VR150 (SATA 2, 750GB,16MB,10000rpm):
Averate Read Transfer Performance: 102.00 MB/s
Averate Write Transfer Performance: 101.60 MB/s
Maximum Write Transfer Performance: 123.90 MB/s
Random Access Time: 7 ms

(with h2benchw 3.6)
 
Indeed. I was specifically referring to your reference to the VR doing 104mb/s in hd tune from this forum sounding like my post which was a read speed (or was it another?), vs the quoted write speed from Tom's (you have to purchase hd tune pro for $35 to get write speeds). Those direct number comparisons above are still just as impressive though.

I will say though that the new Cheetah 15K.5 300's you will find significantly faster in both read/write, but I don't have a ref to write speed, since storagereview only has read, but it is significantly higher than the .4's, which would lead me to believe similar increases in write. Of course, these suckers will likely cost you 2x as much as a VR w/ far more heat, noise and juice to power them.

Anyway, I am in the VR camp, having bought 4 of them. Those Cheetah's are faster, but only in certain server multi-user i/o related benchmarks, which they are optimized for. Which also kinda seems like what you intend them to be used for, so may be server class drives are the better route? As the link you put up from SR above shows, the Cheetah wins in all server level I/O over the VR pretty handily, whereas the VR wins for single user.
 
unfortunately there are no 5's in my country yet in any store's stock, and some prices (only by ordering) are between 400 E and 550 E while a VR is 250 E (same capacity, 300GB)
i belive you that 5's are faster but for the moment i think i'll go on the VR's ... it's already "better than needed" so i'm cool with those.
 
Dreadfull I didnt forget

2x 146GB Seagate SAS with 8mb caches


2x 74GB raptors with 8mb cache
 
great graphs, impressive "maximum value" but .. hmm .. it seems to me it's a little value @ average speed (128MB/s) while a single velociraptor has 104 and two have 204MB/s while 4 have 380MB/s
it's clear for me now, the difference between raptor and vraptor, big one i can say.
Trully, the best solution would be Seagate 15K.5's but for saving money/storage i'll go on vraptors
thanks again, very much even :)
 
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