not saving at required frame rate

[Leen]

Hi,

I want to save images directly to the hard disk during acquisition at a frame rate of 30fps. Although, this is a reasonable, not very high frame rate, im not achieving the frame rate im asking for. The maximum that i can get  is about 14fps for 582x782, 10-bit images and an Ultra-320 15K RPM SCSI hard drive(which is empty; the OS is on another HD). According to my calculations, i should be able to easily save frames at 30fps, as all i am requiring is 17MB/sec, even if we assume that the bus speed is slow.
I am sure that there is something wrong going on. Could anyone please give me some advise or suggestions as how to fix this?

Using: Cohu 7700 Camera Link
            PCI-1428
            Labview 8.5.1

Thanks.

[muks]

CAn you tell me the calculation u used for arriving at 30fps?You have mentioned 10 bit image.Try saving 8 bit images.

[Leen]

well, it is 582x782x10x0.125x30 = 17MB/sec
why should i save 8bits if i should in principle be capable of saving 10bit images?
PS: ive tried 8bits before and still it didnt work.

[TiTou]

It's ok to cross-post to other forums, but please mention it

[Leen]

thanks for pointing it out! 🙂