Off-Topic > Off-Topic - Tiny Core Lounge

counterfeits and fakes continue, buyers be aware and do due-diligence always

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patrikg:
HI Rish

Truth be told, where there is money to be made, there are always crooks around.

gadget42:
mostly i pointed to ValiDrive because that webpage is fairly informative and gives an account of recent purchases of fraudulent drives.
(i haven't tried it as i don't do windows but i was using Steve Gibson's stuff decades ago when i did do microsoft)

i agree with Rich that the description does say "576-region spot-check" near the top of the page

further down on that webpage it says "ValiDrive performs a quick, random-sequence spot-check across the drive's entire declared storage space. At every location it verifies the successful storage and retrieval of random (unspoofable) test data."

actually this additional webpage gives more details:
https://www.grc.com/validrive/ui-details.htm

someday i may grab some old spinning rust and load up windows to play around with ValiDrive but it's not likely in the short-term

ymmv

gadget42:
just ran f3 on a 2GB flash media so i could do a paste:

--- Code: ---somebody@somewhere:~$ sudo f3probe --destructive --time-ops /dev/sdd
F3 probe 7.1
Copyright (C) 2010 Digirati Internet LTDA.
This is free software; see the source for copying conditions.

WARNING: Probing normally takes from a few seconds to 15 minutes, but it can take longer. Please be patient.

Good news: The device `/dev/sdd' is the real thing

Device geometry:
            *Usable* size: 1.83 GB (3842048 blocks)
        Announced size: 1.83 GB (3842048 blocks)
                     Module: 2.00 GB (2^31 Bytes)
   Approximate cache size: 0.00 Byte (0 blocks), need-reset=no
   Physical block size: 512.00 Byte (2^9 Bytes)

Probe time: 2'28"
  Operation: total time / count = avg time
          Read: 1.12s / 4747 = 236us
         Write: 2'27" / 1744961 = 84us
         Reset: 0us / 1 = 0us
somebody@somewhere:~$
--- End code ---

Rich:
Hi gadget42
Just wanted to point out, f3probe does just that, it probes.
It does not write and read all locations.

There's also this:

--- Quote --- ... I’ve marked f3probe as experimental for now because this model has not been battle proven. ...
--- End quote ---
Found here:
https://fight-flash-fraud.readthedocs.io/en/latest/usage.html

gadget42:
just ran f3write & f3read on a 2GB flash media so i could do a paste:

--- Code: ---somebody@somewhere:~$ f3write /media/somebody/2gb-minimee
F3 write 7.1
Copyright (C) 2010 Digirati Internet LTDA.
This is free software; see the source for copying conditions.

Free space: 1.83 GB
Creating file 1.h2w ... OK!                       
Creating file 2.h2w ... OK!                       
Free space: 0.00 Byte
Average writing speed: 5.35 MB/s
somebody@somewhere:~$ f3read /media/somebody/2gb-minimee
F3 read 7.1
Copyright (C) 2010 Digirati Internet LTDA.
This is free software; see the source for copying conditions.

                  SECTORS      ok/corrupted/changed/overwritten
Validating file 1.h2w ... 2097152/        0/      0/      0
Validating file 2.h2w ... 1735320/        0/      0/      0

  Data OK: 1.83 GB (3832472 sectors)
Data LOST: 0.00 Byte (0 sectors)
       Corrupted: 0.00 Byte (0 sectors)
Slightly changed: 0.00 Byte (0 sectors)
     Overwritten: 0.00 Byte (0 sectors)
Average reading speed: 16.46 MB/s
somebody@somewhere:~$
--- End code ---
f3probe done in my earlier post

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