Number (quantity) of files limitations for FAT32 in Labview RT

[gregoryng]

I am using Labview realtime 2009 on a PXI-8130 controller.  I have set up the system partition with Labview RT to be 2GB, with a data partion (D:) which is a fat32 volume of maybe 160 GB. I am recording "a lot" of data and my approach is to chunk them into files, so I would like to be aware of any limitations I might encounter.  I am having some trouble that is possibly related to FAT, but I can't definitevely claim that yet, so I'd like to collect as much information as possible.

What are the limits on the number of files in the root directory, or in an arbitrary directory, etc?  

Also, is the limit of a single file 4GB? I just want to confirm that Labview RT would support a 3.99 GB file, as opposed to only a 1.99 GB file, as signed/unsigned limitations go.

I understand that some limitations are inherent in FAT, but if any are implementation-specific, do any of these limitations change in newer versions of Labview RT?  

[Patricia B · Accepted solution]

Hello,

Here are a couple of articles that may address your questions about FAT 32 and LVRT. The RT operating systems used on NI hardware have the file limitations inherent with the FAT32 standard.

Article 1

Article 2

Regards,

[gregoryng]

That's great. Thank you for collecting those two articles for me.

[Patricia B]

You are welcome Gregory. Here are the articles with their names included in the links for anyone else:

Slow Disk Access in LVRT in Large Directories

Best Practices for Target File IO with LabVIEW Real-Time

Best,