USB memory sticks

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ptonsparky

ptonsparky

Tom
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I bought some Lexar Jumpdrives to use in an older HMI, 4yrs maybe, that would normally use a 4G max. The smallest new ones I could find were a 3 pack of 16G each. The HMI will not recognize them. I'll try to find some smaller Scandisk but what else could be giving me grief?
 
ptonsparky said:
I bought some Lexar Jumpdrives to use in an older HMI, 4yrs maybe, that would normally use a 4G max. The smallest new ones I could find were a 3 pack of 16G each. The HMI will not recognize them. I'll try to find some smaller Scandisk but what else could be giving me grief?
Click to expand...

Is it possible that the HMI only recognizes FAT32 and the drives are formatted NTFS? Check the formatting and re-format to FAT32 if needed and see if that works.
 
Try formatting them for a smaller file system; often it's not the device size but the partition size. Also 4G was the size limit of the FAT32 FS, so if it's 16G it probably came as exFAT and the HMI doesn't understand that.
 
How can you reformat when the machine doesn't even know if there is something that shows in the BIOS.

I would go to the BIOS and see if the USB is registering. If it does you need to conduct a low level reshaping the available space.

This will require sacrificing some available space...which negates your goal to achieve more space.
 
myspark said:
Even if it is not OPs goal you can't do anything if the USB remains incommunicado--much less reformatting.
Click to expand...

Which is why you reformat the drives in a separate computer before trying to use them.
As long as the HMI recognizes a partition table you can create a 4GB FAT first partition and ignore the rest. There should not be an incompatibility at the hardware level.
 
myspark said:
How can you reformat when the machine doesn't even know if there is something that shows in the BIOS.
Click to expand...

You stick it in a machine that does recognize it and reformat there (and if your regular computer doesn't see it, toss that one and get another). Given how cheap these things are now, and how long a reformat takes, it's a really simple diagnostic. (And if the HMI only recognizes 4G partitions, it doesn't matter how much bigger the USB stick is.)

ETA- GoldDigger and I seem to be reading/posting at the same time.:D
 
They Old Working stick and the Non Working new are both FAT32 and when I check properties they are appear to be set up the same.

I checked them both on my laptop.

The HMI has an internal address that can be accessed as an indicator on the screen to show if the memory stick is available or not. Green or Orange respectively in this case.
 
Some thumb drives contain a small read-only partition which contains optional encryption software to be used in securing data on the drive. If that is the first partition, the less flexible HMI bios may not recognize the data partition in second place in the partition table.

Sent from my XT1585 using Tapatalk
 
GoldDigger said:
Some thumb drives contain a small read-only partition which contains optional encryption software to be used in securing data on the drive. If that is the first partition, the less flexible HMI bios may not recognize the data partition in second place in the partition table.

Sent from my XT1585 using Tapatalk
Click to expand...

That's getting above my pay scale. How do I check for that? Then again for the $s, I'll just buy a different brand.
 
ptonsparky said:
That's getting above my pay scale. How do I check for that?
Click to expand...

I use the windoze disk manager (Administrative tools -> Computer Management, click on "Disk Management"), for each physical drive, you should see a pictorial layout. OTOH, getting rid of them is usually a command-line operation, so you probably don't want to go there. (A different stick is much easier, if it works.)
 
ptonsparky said:
That's getting above my pay scale. How do I check for that? Then again for the $s, I'll just buy a different brand.
Click to expand...
When you stick it into your computer, does it show you just the "hard drive" or does it show you a drive and a CD (read-only) device?

Sent from my XT1585 using Tapatalk
 
This is from memory, which makes it automatically suspect, but I think it has to do with sector size.
IE: Old hard-drives (less capacity, ergo smaller sector size) will not be (are not being) recognized by newer operating systems.
 
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