How to detect a fake SSD or flash drive before you get burned

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It’s not simply on doubtful buying and selling platforms corresponding to Temu. Even Amazon will be infiltrated by doubtful sellers who promote SSDs with massive storage capacities as supposed bargains.

These cheat packs don't come from Amazon’s personal warehouse, however from exterior service suppliers who provide their counterfeit merchandise through the favorable “Warehouse” offers (i.e. as returned items).

The standard of the counterfeit drives varies — from low cost fakes to skilled counterfeits that can not be acknowledged as such from the surface at first look.

Along with real flash reminiscence media which have merely been given a special sticker with product specs, there are additionally fully counterfeit circuit boards with a fraudulent controller.

This rip-off will be discovered on exterior drives with a USB connection. The controller methods the working system into believing a false drive measurement, simulates write operations, however solely really shops a fraction of the info.

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F3: Verify for flash drives

With Linux instruments, counterfeit or just faulty flash drives can a minimum of be clearly and reliably acknowledged. The F3 (Combat Flash Fraud) instrument can scrutinize flash drives of every kind and in addition detects refined errors brought on by regular ageing processes.

It isn't fooled by manipulated controller chips, however empirically determines the true capability of a drive in addition to its learn and write speeds.

F3 can even examine the integrity of written knowledge by writing and studying your complete area to establish previous, unreliable flash reminiscence.

F3 is a group of command-line instruments that's current within the repositories of most distributions. In Debian, Ubuntu, and others, for instance, it may be put in within the terminal with the command

sudo apt set up f3

For flash drives corresponding to SD playing cards, USB sticks, exterior drives with flash media, but in addition for inner NVMe SSDs, this system

f3probe

is essentially the most appropriate instrument on this assortment of instruments. It instantly determines the true capability of a drive and isn't fooled by controller chips.

<img decoding="async" data-wp-class--hide="state.isContentHidden" data-wp-class--show="state.isContentVisible" data-wp-init="callbacks.setButtonStyles" data-wp-on-async--click="actions.showLightbox" data-wp-on-async--load="callbacks.setButtonStyles" data-wp-on-async-window--resize="callbacks.setButtonStyles" src="https://b2c-contenthub.com/wp-content/uploads/2025/11/betrug_bei_datentragern_2.jpg?quality=50&strip=all" alt="Check mit f3probe: Das Testprogramm ermittelt die vom Controller gemeldete Gesamtkapazität und vergleicht geschriebene Daten in hohen Speicherbereichen, ob diese tatsächlich lesbar sind." class="wp-image-2977641" width="800" height="438" loading="lazy"/> Verify with f3probe: The take a look at program determines the whole capability reported by the controller and compares written knowledge in excessive reminiscence areas to see whether or not they're really readable.

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An preliminary take a look at can be non-destructive — i.e. it retains the contents of a drive intact.

Like the opposite F3 instruments, f3probe requires root authorization or a prefixed sudo, in addition to the system ID of the drive, with the command

lsblk -d

The command then begins (instance)

sudo f3probe /dev/sdd

the non-destructive drive take a look at. The system should not be mounted for this.

If all the things is okay with a drive, the instrument returns the under message after the examine, which compares the precise measurement with the capability reported by the controller by way of write and skim operations:

Excellent news. The system /dev/sdd is the true factor.

Verify with knowledge loss: If the info on the drive is irrelevant, the “–harmful” parameter performs a quicker take a look at run. This additionally requires much less reminiscence, however overwrites your complete contents of the drive.

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Additionally for HDDs: Thorough take a look at

Whereas f3probe compares the knowledge from the controller with the reminiscence addresses really obtainable on the info service, the F3 instruments

f3write

and

f3read

take a extra common strategy.

f3write writes information with checksums to a mounted medium till it's fully written, and f3read then verifies this knowledge.

As a result of these instruments work at file system degree, no matter the kind of disc being examined, they require partitions which can be already mounted and writable. For instance, if a drive to be examined is mounted beneath “/media/person/5EBD- 5C80/”, then

f3write /media/person/5EBD-5C80/

executes the write course of and

f3read /media/person/5EBD-5C80/

verifies the checksums of the written information. Generally, this examine solely makes use of the free, remaining area on a drive and is subsequently not harmful.

NAS arduous drives: The recording know-how is essential

The Community Hooked up Storage (NAS) system class must be completely obtainable within the community. The mechanical arduous drives, that are nonetheless essentially the most cost-effective answer for giant NAS programs, should subsequently be capable to stand up to steady operation.

The specs of standard SATA arduous drives for desktop PCs don't present for such steady operation. Arduous drive producers subsequently provide drives for these software eventualities with the label “NAS” and a surcharge. Nonetheless, as many customers have realized, even the addition of “NAS” isn't any assure of problem-free operation within the NAS.

Solely arduous disks that don't use trendy SMR (Shingled Magnetic Recording) are typically appropriate for a RAID community of any variety and for the ZFS file system. With SMR, the inner arduous disk controller makes use of the disks very sparingly: Learn-write heads are aligned in order that the tracks on a platter overlap with a purpose to maximize storage density.

Nonetheless, this strategy requires a number of passes earlier than a knowledge file is reliably written and skim.

For RAID, which performs a checksum comparability of written knowledge blocks, this recording method is unsuitable and results in errors and lengthy ready occasions. The Linux kernel builders have documented the issues noticed up to now at raid.wiki.kernel.org/index.php/Timeout_Mismatch.

In line with this, solely the standard recording know-how CMR (Typical Magnetic Recording) with linear tracks is appropriate for arduous disks in a RAID community.

Lately, the arduous drive producers Western Digital, Seagate, and Toshiba brought about a significant scandal when arduous drives with Shingled Magnetic Recording (SMR) had been marketed as NAS arduous drives with out adequate labelling.

Sadly, a tough drive doesn't even reveal through SMART evaluation whether or not SMR or CMR is used. At m6u.de/cmr, a NAS service supplier collects a listing of appropriate CMR arduous drives based mostly on person data.