I've just got my first Raspberry Pi 4. I'm trying to install Raspbian's July 2019 version. I've read all related issues to this problem here and I can´t manage to find the problem.

I downloaded Raspbian with desktop from the official page: https://www.raspberrypi.org/downloads/raspbian/ And flashed it on my Kingston 32 gb Class 10 SD Card using balenaEtcher.

The first incovenient I got was the write speed I got while using balenaEtcher: between 600 and 800 kbps. When the flash finished "succesfully", a tiny warning, hidden under a red X said:

\.\PhysicalDrive1: Source and Destination checksums do not match

I didn't pay attention to this warning and proceeded to turn on my Pi anyway, and then I got the error in the title:

Kernel panic-not syncing: VFS: unable to mount root fs on unknown-block(179,2)

Reading other issues here, I tried editing cmdline.text by changing the rootfs and replace the 2 at the end with a 6, but this made my Pi stuck at the four raspberries without booting.

I also tried doing a filesystem check with fsck.ext4 on my PC with Linux mint but I got a message that said that the filesystem couldn't be found.

I think that the SD Card may be the problem but I just want to make sure it is before buying a new one, as they are not cheap where I live.

I don't know what else I can do. Thanks for your help.


Already run an H2testw, here we have the results:

Warning: Only 30869 of 30870 MByte tested.
The media is likely to be defective.
87.0 MByte OK (178293 sectors)
30.0 GByte DATA LOST (63041419 sectors)
Details:36.5 KByte overwritten (73 sectors)
0.5 KByte slightly changed (< 8 bit/sector, 1 sector)
30.0 GByte corrupted (63041345 sectors)
36.5 KByte aliased memory (73 sectors)
First error at offset: 0x0000000002f41010
Expected: 0x5899e01398821110
Found: 0x5899e01398821510
H2testw version 1.3
Writing speed: 7.95 MByte/s
Reading speed: 9.72 MByte/s
H2testw v1.4

Don't need to make any more clarifications, already bought a new card, thanks for your time.

  • I have been using different types of uSD cards, the writing speed varies from about 4Mb/s to 8/10MB/s or higher. I never saw your ridiculously low speed.
    – tlfong01
    Aug 23, 2019 at 0:56
  • So I should probably switch my SD Card? Aug 23, 2019 at 11:53
  • yes, get two class 10+ ones.
    – tlfong01
    Aug 23, 2019 at 11:57
  • Why 2? I've already bought a new one, I should receive it this afternoon, but why should I get 2? They are not that cheap where I live Aug 23, 2019 at 12:13
  • Well, I was about to suggest to use 16GB Class 10 x 2, which I think is most cost effective, unless you are doing video/image processing things. I always use two cards to swap troubleshooting. You may even consider 8GB Class 10, if it is much cheaper. Beside swap troubleshooting, it is a good idea to keep a backup copy.
    – tlfong01
    Aug 23, 2019 at 12:18


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