new drive slow at the start of the scan , why?

[july]

Hi
i bought yesterday a drive
i did a test
and it's slow at the beggining of the scan after start to be fast


HDDScan Drive Test Report
Model: ST31000528AS
Firmware: CC46
LBA: 1953525168

Report By: HDDScan for Windows version 3.3
Report Date: 12/03/2011 12:06:45

Open Disk
Test : RD-Read


Executing
Block start at 24335616 time 54ms
Block start at 53711616 time 52ms
Paused

[july]

and this

can't understad ?

i did the test under w7 , the drive tested is empty

the speed in the first part of the hardisk go from 18mb - 50mb - 120mb -18mb -50mb and again 120mb /second

[july]

start lba 0
end 15491840
block size 256
firmware CC46
test read   first screenshot


start lba 0
end 15491840
block size 256
firmware CC38
test read

[Doomer]

Hi
Looks like your SATA controller cuts the speed

[july]

Hi
Looks like your SATA controller cuts the speed

but i have 2 hard disks , with different firmware

why should only 1 be so slow in the inner part of the disk ?

[Doomer]

I don't see any slow drives
Which one is slow and which one is fast?

[july]

I don't see any slow drives
Which one is slow and which one is fast?

the  ST31000528AS with  Firmware: CC46 , is the first screenshot chart

the speed  continue to oscillate, fluctuate in the inner zone , after i guess 50gb start to be stable @ 120mb/s


did you see a screenshot like i posted?
do you think it's normal?

thanks
cheers

[Doomer]

No I don't think they normal but it's hard to tell why
Can you show SMART from both drives?

[july]

No I don't think they normal but it's hard to tell why
Can you show SMART from both drives?

yes

did you see in the past a graph, chart like chart2

[Doomer]

Nothing criminal in SMART
Probably the problem is elsewhere