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2 x velociraptors in RAID 0 not impressed

2196 Views 14 Replies 9 Participants Last post by  broken pixel
i picked up a vr the other day to add some speed to my system...at the same time, i grabbed a WD caviar black 1tb for storage.
after hooking them up, and getting my os installed..i compared speeds of the new drive with the OS and other stuff loaded to the empty 1tb drive and to my old seagate 500gb..
the seagate was horrible...but the 1tb drive was only a couple steps behind my VR.
seagate was around 70

here is the score for the caviar black 1tb using xbench (on a osx86 system right now so i dont have many options..if anyone can recommend something for HD testing on a mac..let me know)

Results95.29
System Info
Xbench Version1.3
System Version10.5.6 (9G66)
Physical RAM6148 MB
ModelMacPro3,1
Drive TypeWDC WD1001FALS-00J7B0 WDC WD1001FALS-00J7B0
Disk Test95.29
Sequential162.54
Uncached Write162.5199.78 MB/sec [4K blocks]
Uncached Write162.1291.73 MB/sec [256K blocks]
Uncached Read140.3841.08 MB/sec [4K blocks]
Uncached Read193.6697.33 MB/sec [256K blocks]
Random67.40
Uncached Write23.682.51 MB/sec [4K blocks]
Uncached Write319.02102.13 MB/sec [256K blocks]
Uncached Read114.910.81 MB/sec [4K blocks]
Uncached Read189.1435.10 MB/sec [256K blocks]

i ran this test on the single VR and it scored a 105.something
i dont have the info right now, i currently have the drive configured in a RAID and cant test it at the moment)
i was expecting a bit bigger difference than this..especially for the smaller capacity..and the HUGE price difference.

so then after some readin online, i became interested in setting up a software RAID 0 stripe using apple raid (128k stripe) built into osx...people were having excellent results even compared to hardware raid..
i set this up..everything went smoothly..and the tested results from the 2 x VR RAID 0 :

Results149.55
System Info
Xbench Version1.3
System Version10.5.6 (9G66)
Physical RAM6148 MB
ModelMacPro3,1
Drive TypeVRRAID
Disk Test149.55
Sequential257.30
Uncached Write303.72186.48 MB/sec [4K blocks]
Uncached Write271.02153.35 MB/sec [256K blocks]
Uncached Read172.2750.42 MB/sec [4K blocks]
Uncached Read362.44182.16 MB/sec [256K blocks]
Random105.41
Uncached Write46.504.92 MB/sec [4K blocks]
Uncached Write234.7175.14 MB/sec [256K blocks]
Uncached Read168.511.19 MB/sec [4K blocks]
Uncached Read160.0829.70 MB/sec [256K blocks]

now i was somewhat pleased with this result
...until i read some results from others in the same thread where the apple RAID discussion was taking place..
the person who posted the thread had taken two samsung spinpoint 1tb drives and scored a 194 on their disk test.
so i set up an apple raid with 2 different HDDs, a 1tb and a 500gb seagate..slower drives..supposedly.

Disk Test
142.12

Sequential
262.22
252.33

Uncached Write
308.47->
336.29->
189.40 MB/sec [4K blocks]
206.48 MB/sec [4K blocks]
Uncached Write
283.48
319.66->
160.39 MB/sec [256K blocks]
180.87 MB/sec [256K blocks]
Uncached Read
173.99
140.32
50.92 MB/sec [4K blocks]
41.06 MB/sec [4K blocks]
Uncached Read
365.33->
381.14->
183.61 MB/sec [256K blocks]
191.56 MB/sec [256K blocks]
Random
97.48
90.68

Uncached Write
46.68
32.07
4.94 MB/sec [4K blocks]
3.40 MB/sec [4K blocks]
Uncached Write
360.47->
395.93->
115.40 MB/sec [256K blocks]
126.75 MB/sec [256K blocks]
Uncached Read
122.21
173.79
0.87 MB/sec [4K blocks]
1.23 MB/sec [4K blocks]
Uncached Read
115.55
215.06
21.44 MB/sec [256K blocks]
39.91 MB/sec [256K blocks]

(sorry..got these from an online score i posted..the formatting is messed up)

the results are only a couple steps behind the $400+ VR raid setup!

i was wondering if i am waisting my money on these VR drives...and should i just order the cheaper samsung drives and have a faster setup with MUCH more storage? i can get the samsung drives for under 100.
these VRs are alot of hype in my book...im going to package them up after a couple spinpoints are in my hands....
if anyone has any help or advice to offer...thats why im here!
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Quote:


Originally Posted by Pouleterie
View Post

The perc I bought costed me 95$USD, with 30$ shipping.. It really wasn't that bad at all... Just looked out for you but couldn't find them anymore. Guess I got lucky. It was refurbished though... But that's good enough for me since it came with the BBU, cables and all that yadda.

who you order it from? 95$ and refurb sounds familiar on ebay, the seller i bought mine from was selling them at 120$ with two cables and 95$ without cables (the sas 32 pin to 4x sata)

if its the same guy, your going to need to purchase a cable or two.. (standard SATA cables wont work)


"songmin" was my seller. wonder who he is on oc.net though.. (mentions the perc 5/i thread on his listings)
 
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