Can anyone explain this on my external?

First off its a rosewell eSATA external with an hitachi deskstar 1TB 7200rpm hardrive. If you look at the benchmark tests its capped at 90-95MBps minus a couple spikes. It should have a nice curve going but its obviously capped. I read in one test(internal) that someone did on newegg that it reached about 125-135MBps in reads so I know that its higher. Now look at the file benchmark tests. Particularly the 512MB test since that is a big enough file so the cash and other things dont mess it up. It shows that its hitting the 125-135MBps for the file benchmark test...so the question is why are they different? Both tests should be hitting those speeds so why in one test is it showing it being throttled/capped or whatever the term is you want to use? From what i have read eSATA is the exact same as SATA II they are both 3.0Gbps which is like 260ish MBps actual output...so whats going on?


For reference here is the calculations that i pulled from wikipedia
Taking 8b/10b encoding overhead into account, they have an actual uncoded transfer rate of 2.4 Gbit/s (3000000000*8/10/1024/1024/8 ≅ 286.10 MiB/s)
So there is no reason for my external to be capping through eSATA


Links for my external
ImageShack Album - 15 images

Test of my internal showing no cap...granted my internal 7200 on my laptop blows ^^ asus gave me bad internals...they both are in warning according to smart lol. one has 36 dead sectors lol

http://img821.imageshack.us/img821/2812/internallol.png




EDIT n my external i got the AAM turned to the highest hence why i got 14.3ms on average ^^...default was like 17-18 and i said screw that

EDIT:also the cache test in the extras test only goes 90-95MBps...

 

You will never see true SATAII 3GB/s speed with a mechanical drive. Now the issue with the file benchmarking tests, IDK. Benchmarking speeds don't always mean real world speeds though.

 

scratch that post miss read what he said lol.


I know i'll never reach true 3.0GBps but my point is why is my drive capped at 90-95MBps. one test shows that and another shows ~130MBps which is what my hardrive is supposed to get. Mechanical drives are supposed to have a nice gradual curve from outer to inner drive. outer=fastest and inner=slowest. But the chart/test clearly shows its capped at 90-95MBps...i have done countless tests and they all are the same give 5 or so MBps


EDIT:if you mean wont give real world speeds aka benchmarks should show higher scores correct...they should be optimistic....so why am i coming up short?

 

BUMP can any one help explain this????

 

BUMP...can no one answer?

 

What eSATA card do you have? If it's internal, still, what is the model? Perhaps try update drivers etc, and check what mode the external drive is in.

 

its an eSATA port on my asus G51J-A1. I'll check my model when i get off work and report back later. Also what do you mean what mode is my external in?

 

Transfer mode, I suppose. Would be trying to find a bottleneck, i.e. eSATA connection itself, how the eSATA port is internally connected.

 

*Shrugs* eSATA goes into case and than to a board to the SATA II controller on the card to harddrive...want me to post a picture?

I cant find anything tats exactly eSATA so i did the windows check and update automatically for everything called SATA IDE or anything related to it and they all said currently up to date minus A7T9W210 IDE Controller...windows couldn't find drivers online for it....is this the eSATA controller? It said something about mass storage in properties...sorry i have never messed with this stuff before ^^

EDIT: Want to see my desktop through skype ^^

 

Bump! I'm sure that there is someone who knows more about this than I do.

 

crap you dont know anything else....would you mind looking at my laptop through skype to see if you can figure out which device is eSATA

 

looking at the benchmark you are being limited by the port. It could also be the controler but I think it is the PC itself. The fact that your burst rate is so limited is a pretty good indicator of this.

It could be driver related for the eSATA port or even bios limited. If you have it in IDE compatability maybe it is then being limited to PATA speeds.

It could be the external enclosure too, if it is a dual compliant SATA and PATA drive interface it may get ilimited to PATA speeds yet again.

I know these are just guesses but it is kind of funny it is being limited to ATA100, or there about, speeds...........

 

Newegg.com - Rosewill RX-358-S BLK (Black) 3.5" SATA to USB & eSATA Ext. Enclosure w/Int.80mm fan

thats my external....i havent heard anything about it have anything else beside eSATA in it....also i dont nkow which is my eSATA device in device manager....can you help explain which one it is?

EDIT both of you get +rep

 

ok...so i noticed this in HD tune

http://img137.imageshack.us/img137/1839/ultraata133.png


so its in ultra ata/133 mode...aka why its being capped at 90-100MBps so now the question is how do i fix this?



EDIT:

http://img685.imageshack.us/img685/6979/secondinternalhardrive.png
this is my second internal hardrive and it shows it being the same thing? so is this a motherboard or driver issue? Second my other internal drive that is the OS drive does not show anything in the support/active section so i cant say whats going on with that.

 

*****bump****

 

****bump***** can anyone help at all

 

You will not get any more responses, DCMAKER.

Some enclosures are bandwidth limited and yours seems like one of them.

This is one reason that I use Vantec enclosures almost exclusively.

Reliable, compatible, and fast.

 

um its obvious its not the enclosure brainiac. as you can see it has to do with the laptop. also check this forum thread out. it talks about the PM55 and HM55 how they screw with SATA speeds. so this could be the cause maybe but i am not sure. If you look at my internals its top speed is almost 100MBps yet the burst rate is very low....that obviously shows the limitation being under 100MBps which would come to being ultra ata/133 speeds.


http://forum.notebookreview.com/har...-full-advantage-fast-ssds-24.html#post6660941

 

Even if it's your laptop, it is not because of the chipset (it has other issues).

Have you tried another enclosure?

Is your internal HD capable of exceeding 100Mbps?

Have you tried different AHCI drivers like IRST 9.6?

Last, but not least; HD TUNE is not the last word in accurate burst speed measurement.

 

i am googling the IRST 9.6 and i don't find a place to get them. do you have a link

EDIT looking through intel for the right one.

 

See:
 Intel(R) Rapid Storage Technology

Good luck.

 

firmware appears to have no effect