You have one LTO tape that you believe is faulty and you can’t read the LTO-CM from it with the ACR122U.
Are you saying that you haven’t been able to read any LTO-CM with the ACR122U and that you tried some that should work?
Did you try positioning the LTO-CM in various places and angles on the reader? If you are unsure where it is in the cartridge there is a cut open cartridge on the wikipedia page.
Yes, I’ve tried a variety of LTO tapes and can’t read the LTO-CM of any of them. I even went so far as to open one up, and pull the RFID tag out of it and place it directly on the reader and got nothing.
I don’t know the reader in question myself, but it does sound like it is applying more in the way of smarts than you need and not telling you about the tags that it can’t understand.
If you are going to go down the Proxmark3 route I would suggest a Proxmark3 Easy from Dangerous Things. I am just a happy customer, but it is a lot cheaper than an RDV4 and should be fairly straightforward to use to read the tags even if it doesn’t know what it is looking at.
I hope someone else has some useful ideas but I am afraid I can’t think of anything else to try with the equipment you have.
If you are returning your “cheap” ACR to Amazon, you might try purchasing a cheaper but guaranteed genuine one from KSEC (as I see you are in the UK) as apparently there are less reliable counterfeits around.
Well I bought another ACR122U reader, this time from KSEC. The label on the back uses slightly different typefaces and fonts so maybe the Amazon one was a fake. But in any case… this new one doesn’t work any better.
I created a fresh install of Ubuntu (16.04 for my ESXi 5.5u3 box), and then:
installed pcscd and pcsc-tools
blacklisted pn533_usb, pn533 and nfc in /etc/modprobe.d/blacklist.conf
installed the ACR122U drivers for xenial from the ACS website
installed libnfc-dev and libnfc-bin
installed & compiled nfc-ltocm
So the reader works under pcsc_scan and nfc-list as I would expect, reading Yubikey and other RFIDS, but simply does not react to any LTO.
When I try nfs-ltocm it reports:
“Error: error with LTOCM REQUEST STANDARD, no tag present?”
I don’t really want to have to fork out for a PROXMARK3 to do this but I’m at my wit’s end.
I’m not sure what you Covid lock down situation is at the moment, and you will probably wato contact them first, but I’m pretty sure KSEC are in the Canary Wharf area, so just a quick train trip for you, they may be able to help you out @KaiCastledine
It has not, I don’t know the acr122u at all. The LTO standard does include an rfid chip inside the cartridge. Some people optionally add RFID tagged labels to the outside of the case. According to a veritas thread on the subject the content of the chip contains some raw data that is not particularly useful. If the acr122u is looking for anything other than raw reads it might not be able to read the tag.
Okay, it seems that the software installation (nfc-ltocm) has been completed, and the ACR122U has been detected from your PC based on your error message report.
I guess that the LTO cartridges is not placed on the reader properly. I would recommend to see the following YouTube video to make sure how you should locate the cartridge.
This video uses Proxmark3, but it would give you an idea of the location. Since the allowable distance between chip and reader is roughly ~1cm or so, you might need to do some “try-and-error” to find the right location.
Can we take a step back a sec, you said one of the tapes was not working in the tape deck so your trying to read the rfid tag.
Why? The rfid tag if I remember rightly is primarily there for when you achieve loads of tapes you can easily read the tag to find out what data is on there with that said the tag is programed separately at least it was when I did it and only with the details we gave it I.e. server backup 12/02/19.
