Error -201402; how do you programmat​ically determine 'Samples per file' size

Question

Error -201402 - The samples per file is not divisible by the file write size. The error also give a suggested value to use, which is helpful, and i have amended by code to suit this value.
I am writting to a tdms file in chunks, such as the first 2.5-5 seconds save the data (sampled at 1M samples per second per channel) to tdms files named initial.tdms, initial_0001.tdms (need to be able to split the files due large data size) then capture the remainder, such as 150 seconds of data (sampled at 1000 samples per second per channel) into a single file, remainder.tdms
Example Inputs to the vi will be:
Initial sampling rate = 1M
Initial acquire time = 2.5 seconds
Remainder sampling rate = 1000
Remainder acquire time = 150 seconds
What I want is to be able to programmatically set Logging.SampPerFile and maybe Logging.FileWriteSize to improve maintainablility and code reuse (I have a number of difference sequence patterns to generate/ capture.)
I am also developing this code on a debug system which may have a different hard drive volume sector size so need to be able to derive the FileWriteSize based on this value, but don't know how to get/view this hard drive info.
How do I go about this?
Cheers,
Helen
CLD, CTD

Answer 1

Thank you for your help.
The Get Volume Info does indeed give me the Sector Size, however i still had problems with working out what multiple of the sector size to use.
Based on "Samples per file - must be EVENLY divisible by the file write size" and "File write size - must be EVENLY divisible by the sector size" I have derived te following code snippet which ensures that the calculated SampPerFile is divisible by 4 (2 lots of evenly divisble by).
Whilst this appears to work I wonder if anyone could comment/ suggest any pitfalls etc.
Regards,
Helen
CLD, CTD