Data safe or destructive ?

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New member
Feb 29, 2024
Hi there,

Is the app test safe or destructive to the drive content ? :unsure:

Best regards,
safe or destructive
If the drive is a quality drive, and doesn't have the problems that ValiDrive is testing for, then the test is meant to be non-destructive. If however, the drive is built with some of the cheats that ValiDrive is trying to detect, then it's possible that it could have intentional misbehaviour that could lead to lost data. To be clear however, it would ultimately be the case that continued use of a misbehaving drive would lead to data loss anyway...

As ever, USB flash devices, even of the highest quality, are not suitable for backups. Make [multiple] backups on quality media if the data matters to you.
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Is the app test safe or destructive to the drive content ? :unsure:
Paul Holder described it perfectly. The app itself is carefully designed and well tested to always put the data back that it reads and writes. But if the drive is not accepting writes reliably then it's possible that ValiDrive's attempt to replace the original data might fail.

So... Yeah... It SHOULD be non-destructive. (y)
So, as a summary, you should add to the description of the app : "Non destructive scan... for "bona fide" devices (i.e. ligit & untampered)" ! ;)

Good job Steve :geek:(y)
What if the drive returns garbage from a sector and reports it as good? Most modern Seagate drives with weak heads will return what data recovery professionals refer to as mOLD and sEDU garbage instead of reporting a read error. Most of the time, the contents of the sectors can be read with a head swap or even sometimes with some custom firmware tweaks. Any writing to these drives could result in permanent data loss or complete drive failure.
It ONLY tests USB flash devices.
ValiDrive will test ANY drive connected do a USB port. That includes USB flash drives, USB SSD drives, USB HDD drive, and USB NVMe drives.

I have tested my USB HDD's with ValiDrive. It works great! (I do not have any USB SSD's or NVMe's)
My point, obviously not adequately expressed, is that while ValiDrive can properly scan any USB drive, be it flash, SSD, NVMe, or HDD, the focus of ValiDrive is of course USB Flash drives, as that is where probably 99+% of fakes will likely be found. It is simply too easy and cheap to create these fakes.

But for SSD, NVMe or HDD USB drives, it is much harder (and more costly) to fake them and so such fakes are much less likely to be encountered. So, while ValiDrive can properly scan these USB drives there may not be that much point in doing so.
Actually, I'm not sure if they're common, but I have seen fake SSD (I also think NVMe, but that I'm not sure if I have actually seen) on the market. Basically, they use a MicroSD card instead of whatever type they're advertised as (if they even say what type of drive they are). The ones I'm thinking of are not on Amazon, but operate like those "As seen on TV" types of products. They'll post an ad on social media saying you just plug in the device and your photos are backed up.
I have not found any of my flash drives to be fakes. My buying strategy (probably not perfect but seems to work) is keep to name brands, and if something is cheap- avoid it. I've bought all my flash drives off Amazon and so far all good. Same for SSDs and spinners. Validrive- great utility!
Thanks @Ralph. It's generally the case that the "if it's too good to be true" rule applies. I have a microSD card here which I purchased for ValiDrive testing knowing that it HAD to be bogus. First, it was not very expensive. But secondly, it's a microSD card claiming to story 2TB of data! -- that would be 16 TRILLION BITS of data. Nope.
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Just put in a brand new Sandisk 16G drive that I had in a cupboard, never used. Will not mount, a DOA drive. Doubt RS will work on it at all, it just is showing as a read only file system, with no partition table, though it does appear to format and verify.