Text files on the roborio?

[shindigo]

Hi All -
I have looked around the links on this post for more information about using a USB stick, but can't find much.

I see that I can reference /U/ and /V/ (presumably for the two USB ports).

When I plug a Kingston NTFS-formatted USB stick and connect via FTP (Filezilla) I can see the KINGSTON device, but not the folders. I assume this is because the stick is formatted NTFS.

If I use a FAT-formatted USB stick, will I see it as /U or /V depending on the port it is plugged into? Any other fine points about getting this to work for data logging?

tia -

mp

[nickmcski]

Originally Posted by shindigo

Hi All -
I have looked around the links on this post for more information about using a USB stick, but can't find much.

I see that I can reference /U/ and /V/ (presumably for the two USB ports).

When I plug a Kingston NTFS-formatted USB stick and connect via FTP (Filezilla) I can see the KINGSTON device, but not the folders. I assume this is because the stick is formatted NTFS.

If I use a FAT-formatted USB stick, will I see it as /U or /V depending on the port it is plugged into? Any other fine points about getting this to work for data logging?

tia -

mp

If you look above at what Joe Ross said I think that will answer your question. He says the USB drives will be mounted to /media/sda1

[shindigo]

Sorry forgot to mention that I did look for /media/sda1, and I do not see the device listed that way. Neither do I see it listed as U or V.

I have since formatted my device as FAT and tried again with no luck. It is a 64Gb stick - any chance there is a size limit?

As an alternative I could use the internal storage. Read in the specs for the Roborio that the internal storage capacity is 256 MB. Can anyone tell what the approx remaining capacity is after loading JRE and robot program? Filezilla is not help me figure that out.

mp

[shindigo]

Happy to report that I finally got this working using another smaller, FAT formatted USB stick.

Placed in the bottom USB port (the one closest the logo) this appears as: /u, /U and /media/sda1.

So I guess we should avoid NTFS and very large capacity sticks.

mp

[jhersh]

Originally Posted by shindigo

Placed in the bottom USB port (the one closest the logo) this appears as: /u, /U and /media/sda1.

Note that it doesn't matter which USB port you plug it into. It matters what order you plug them in.

[eddie12390]

Originally Posted by shindigo

Sorry forgot to mention that I did look for /media/sda1, and I do not see the device listed that way. Neither do I see it listed as U or V.

I have since formatted my device as FAT and tried again with no luck. It is a 64Gb stick - any chance there is a size limit?

As an alternative I could use the internal storage. Read in the specs for the Roborio that the internal storage capacity is 256 MB. Can anyone tell what the approx remaining capacity is after loading JRE and robot program? Filezilla is not help me figure that out.

mp

This is probably a stupid question, but did you restart the robot after plugging in the flash drive? We've had to do this every time that we used one.

[jhersh]

Originally Posted by eddie12390

This is probably a stupid question, but did you restart the robot after plugging in the flash drive? We've had to do this every time that we used one.

I have never rebooted after plugging in a thumb drive and it has always worked.

[GeeTwo]

Originally Posted by shindigo

I have since formatted my device as FAT and tried again with no luck. It is a 64Gb stick - any chance there is a size limit?

FAT was traditionally limited to 4Gb. It seems to have been extended a bit. However, a recent search turned up:

You cannot decrease the cluster size on a volume using the FAT32 file system so that the FAT ends up larger than 16 MB less 64 KB in size.

It sounds like Micros*** is utterly muddying the waters yet again; this is worse than traditional by several orders of magnitude.
They also included on the same page, probably more germane:

You cannot format a volume larger than 32 GB in size using the FAT32 file system in Windows 2000. The Windows 2000 FastFAT driver can mount and support volumes larger than 32 GB that use the FAT32 file system (subject to the other limits), but you cannot create one using the Format tool. This behavior is by design. If you need to create a volume larger than 32 GB, use the NTFS file system instead.