Update on P4C800-E dlx slow read speed

[Dave]

Just an update and was hoping that somebody can shed a light on why I'm
getting low read speed if I'm using RAID on intel controller
Anyway here's what I did...
I updated the bios to v1014, installed Intel Application Accelerator v3.5r
and ran the benchmark once more
here's what I got (copy paste from excel)

Version 2.61
Promise 320 gig Promise 200gig
Acess time 14ms 13.6ms
Burst Speed 80> 80>
Max 105898 Max 97863
Min 7695 Min 15710
Avg 47658.2 Avg 52276.3
Utilz 2.70% Utilz 2.10%

Version 2.70
Promise 320 gig Promise 200gig
Acess time 14.7 13.6ms
Burst Speed 200> 200>
Max 116.9 Max 82.7
Min 23.4 Min 33.3
Avg 57.9 Avg 54.1
Utilz 3.5 Utilz 3


Version 2.61
Promise 320 gig Intel 200gig
Acess time 14.1ms 13.4ms
Burst Speed 80> 36.6
Max 105360 Max 27934
Min 13548 Min 2989
Avg 47543.8 Avg 24301.6
Utilz 2.6 Utilz 1.10%

Version 2.70
Promise 320 gig Intel 200gig
Acess time 44.3ms 13.4ms
Burst Speed 200> 38.1
Max 100.7 Max 37.3
Min 18.7 Min 22.6
Avg 56.9 Avg 30.1
Utilz 3.4 Utilz 1.5


Notice that I don't get that blazing fast read speed (809 MB/s) but still
slow
and to answer my own question, you CANNOT migrate RAID array from intel
controller to promise controller and vice versa without loosing data.
Just a warning to other people who's planning to move their RAID array from
promise -> intel and vice versa

Any input on this matter would be greatly appreciated

Thanks!

 

[tonyd]

got a 2.6GHz CPU. 2 WD raptors (10K rpm) on Intel SATA, RAID0. 2 Maxtor
200GB on Promise, RAID0.

Appears SATA is CPU intensive so Promise might be a better alternative.
Software based RAID versus hardware based RAID?

Neither appears close to the stated Read Burst Speed.

Disclaimer... HDTach may be obsolete? Or at least that's what their web
site says.

Are we being sold a bill of goods about performance?


Here's my info:

Intel SATA RAID0: (iaStor.sys V 3.5.0.2568 6/17/03) 3 runs
WD specs: Average Read Seek is 5.2msData Transfer Rate (maximum)
- Buffer to Host
- Buffer to Disk
150 MB/s max2
102 MB/s max



Random Access Time (ms): 9.1 8.8 8.9
Read Burst Speed (MB/s) : 96.9 96.9 96.9
Read Speed (MB/s): max. 89.5 89.3 89.0
min. 42.3 38.6 35.9
avg. 62.9 63.0 63.3
CPU util. (%) 5.0 5.4 4.7


Promise IDE RAID0: (Fasttx2k.sys V 1.00.1.37) 3 runs

Maxtor specs: Average Seek Time 9.3ms (or less)
Data Transfer Rate: up to 133 MB/sec

Random Access Time (ms): 13.4 12.7 12.7
Read Burst Speed (MB/s) : 107.0 107.0 107.0
Read Speed (MB/s): max. 91.5 90.9 89.4
min. 30.1 33.2 30.1
avg. 50.0 50.9 50.4
CPU util. (%) 1.8 1.9 1.9