How to copy saved waveforms from DSO quad (firmware 2.7)?

Products & Technology DSO Quad
#1

First, sorry for my bad English. It’s really terrible.

I want to save waveforms from DSO quad (2.7) and copy it to my PC. There are no error messages when I save waveform (“save bmp”), but I can’t copy it to my PC.

If I power-off my DSO and the connect to USB, no disks appears. When I connect DSO to USB and power-on DSO holding “play” button, disk appers and it’s correct. But there are no files there.

When I normally power-on my DSO and connect to USB, disk appears, but it’s buggy (there is no partition table, wrong device):

[code]Disk /dev/sdc: 2 MiB, 2097152 bytes, 4096 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x6f20736b
This doesn’t look like a partition table. Probably you selected the wrong device.

Device Boot Start End Blocks Id System
/dev/sdc1 ? 778135908 1919645538 570754815+ 72 Unknown
/dev/sdc2 ? 168689522 2104717761 968014120 65 Novell Netware 386
/dev/sdc3 ? 1869881465 3805909656 968014096 79 Unknown
/dev/sdc4 ? 0 3637226495 1818613248 d Unknown
[/code]

Anyway, I tried force mount the whole disk (/dev/sdc) as vfat filesystem. It’s ok. But some filenames in the disk contain “random” non-ascii characters and some files con’t be read (I/O error). I can read only part of available IMAG*.BMP, but most of these images are corrupted.

What I’m doing wrong?

#2

It’s normal that there is no partition table. Quite a many USB devices seem to do that for some reason…

Other than that, the filesystem is probably corrupted. Try reformatting. Installing AlterBIOS may also help.

#3

Thanks! With AlterBIOS and reformating* flash all works fine.

  • Actually, when I reformat DSO’s disk with “mkfs.vfat -F 32 -I” I get a error that there are too few clusters (there are 4000, but FAT32 need 64k). After that I can mount the disk without any warnings or errors and, moreover, DSO can succesfully save parameters and calibration and restore it from the disk at power-on. BUT: when I mount the disk, there are no files at all in the disk. So, where DSO stores its parameters and calibration?

OK. I found in the seeedstudio’s Wiki an image of empty DSO’s disk. I succusfully burned it to DSO via “dd”. And now all works fine: DSO’s settings in the *.PAR file, screenshots in *.IMG… I also have change preferences and make calibration again because it lost after burning new image.

It’s very strange. Why I seen no files in the disk, but DSO could succesfully store and restore settings from the disk?