Fighting Fake Flash products

[r1bnc]

Magingat kayo sa mga fake MicroSD cards. Ginagaya nila yung mga populat brands tulad ng Sandisk, Adata, Samsung, Toshiba, Kingston, etc. Pero yung font size ang laging naiiba kaya ingat sa pagbili or kahit yung mga pasunod na items kung bibili ka ng phone, tablet etc.

Other references: http://www.happybison.com/reviews/how-to-check-and-spot-fake-micro-sd-card-8/

To Test Flash memory on WIndows:
Download H2Test

To Test Flash memory on GNU/Linux, BSD, macOS:
http://oss.digirati.com.br/f3/

FAKE PRODUCT:
SANDISK 16GB CLASS10 MicrSD w/ SDHC adapter

IMAGES:

Sandisk 1

Sandisk 2

Sandisk 3

F3 Screenshot

Building F3 for GNU/Linux:
Kung hindi mo mainstall via package manager ibuild mo from source:
For Debian based distro:

$ sudo apt-get update
$ sudo apt-get install git build-essential
$ git clone https://github.com/AltraMayor/f3
$ cd f3
$ make
$ sudo make install
$ make extra
$ sudo make install-extra

to uninstall
$ sudo make uninstall

USAGE:
alamin ang drive block name eg. /dev/sdb, /dev/sdc ... /dev/sdX
and /dev/sda ay ang Hard drive mo kaya wag, WAG, WAG mo ilalagay ito kung ayaw mong mawala lahat ng files mo

Gumamit ka ng GNOME Disk Utility para mas madali
Insert and microsd/usb flash drive na gusto mong itest.
Mount mo ang device sa isang folder.

Buksan ang Terminal/shell

$ dmesg|tail
hanapin ang USB device na inisaksak mo.
$ lsusb

OUTPUT:

[21042.901173] scsi 32:0:0:0: Direct-Access     Mass     Storage Device   1.00 PQ: 0 ANSI: 0 CCS
[21042.902321] sd 32:0:0:0: Attached scsi generic sg1 type 0
[21043.699548] sd 32:0:0:0: [sdd] 32768000 512-byte logical blocks:[B] (16.7 GB/15.6 GiB)[/B]
[21043.700794] sd 32:0:0:0: [sdd] Write Protect is off
[21043.700798] sd 32:0:0:0: [sdd] Mode Sense: 03 00 00 00
[21043.701427] sd 32:0:0:0: [sdd] No Caching mode page found
[21043.701432] sd 32:0:0:0: [sdd] Assuming drive cache: write through
[21043.705758]  sdd: sdd1
[21043.708433] sd 32:0:0:0: [sdd] Attached SCSI removable disk

ang bagong detected na device ay na sa block /dev/sdd.

Verifying kung fake or not and flash drive or memory card;
F3WRITE - gagawa ng set of files si F3WRITE hanggang mapuno ang drive tapos iveverify natin ito gamit ang F3READ.

[B]$ f3write ~/16GB[/B]

SAMPLE OUTPUT:

user@pc:/media/user/CD38-XXXX$ f3write .
F3 write 6.0
Copyright (C) 2010 Digirati Internet LTDA.
This is free software; see the source for copying conditions.

Free space: 15.61 GB
Creating file 1.h2w ... 0.30% -- 6.00 MB/s -- 4:25:51
.
.
.

F3READ
Verify natin kung merong corrupted na file.

$ f3read /media/user/CD38-XXXX

SAMPLE OUTPUT:
user@pc:/media/user/CD38-XXXX$ f3read .
F3 read 6.0
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 ...  109502/        0/      0/      0

  Data OK: 53.47 MB (109502 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: 15.54 MB/s
user@pc:/media/user/CD38-XXXX$

REFERENCE:

F3PROBE
kelangan nito ng root access at posibleng magcorrupt ang files na nakasave sa memory card /flash drive mo kaya ibackup mo na. (DESTRUCTIVE TEST)

$ $ sudo f3probe --destructive --time-ops /dev/sdc
F3 probe 6.0
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.

Bad news: The device `/dev/sdc' is damaged

Device geometry:
                 *Usable* size: 0.00 Byte (0 blocks)
                Announced size: 15.62 GB (32768000 blocks)
                        Module: 16.00 GB (2^34 Bytes)
        Approximate cache size: 31.00 MB (63488 blocks), need-reset=no
           Physical block size: 512.00 Byte (2^9 Bytes)

Probe time: 1'
 Operation: total time / count = avg time
      Read: 19.18s / 131283 = 146us
     Write: 40.87s / 131088 = 311us
     Reset: 565.7ms / 2 = 282.8ms

F3FIX
Susubukan nito na 'fix' ang ang fake flash drive mo. Kung meron kang 16GB na fake flash drive, at sabi ni F3PROBE 8GB lang ang usable space ibig sabihin 8GB lang talaga ang flash drive, pero kapag na format ito babalik sa 16GB pero yung 8GB + na space ay magcocorrupt kaya gagamitan ng F3FIX para magawa na 8GB lang ang partition at idisregard ang sobra pa na 8GB partition dahil peke ito.
kung ang output ng F3PROBE mo ay ganito:

$ sudo f3probe --destructive --time-ops /dev/sdb
[sudo] password for michel: 
F3 probe 6.0
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.

Bad news: The device `/dev/sdb' is a counterfeit of type limbo

You can "fix" this device using the following command:
f3fix --last-sec=16477878 /dev/sdb

Device geometry:
	         *Usable* size: 7.86 GB (16477879 blocks)
	        Announced size: 15.33 GB (32155648 blocks)
	                Module: 16.00 GB (2^34 Bytes)
	Approximate cache size: 0.00 Byte (0 blocks), need-reset=yes
	   Physical block size: 512.00 Byte (2^9 Bytes)

Probe time: 1'13"
 Operation: total time / count = avg time
      Read: 472.1ms / 4198 = 112us
     Write: 55.48s / 2158 = 25.7ms
     Reset: 17.88s / 14 = 1.27s

ETO ANG GAGAMITIN MONG COMMAND SA F3FIX

$ f3fix --last-sec=16477878 /dev/sdb

OUTUPUT:

$ sudo f3fix --last-sec=16477878 /dev/sdb
F3 fix 6.0
Copyright (C) 2010 Digirati Internet LTDA.
This is free software; see the source for copying conditions.

Error: Partition(s) 1 on /dev/sdc have been written, but we have been unable to inform the kernel of the change, probably because it/they are in use.  As a result, the old partition(s) will remain in use.  You should reboot now before making further changes.
Drive `/dev/sdc' was successfully fixed

AYAN NA AYOS NA ANG PEKE NA FLASH DRIVE. HUMINGI KA NG REFUND SA PINAGBILAN MO AT IPAKITA MO ANG LOGS NA GINAWA MO PARA MANIWALA SILA NA PEKE ANG BINENTA NILA SA YO.
Merry X-Mas Symb

 

[kahitmaputi]

sa lazada ako bumibili kaya kung fake pde soli