Iso corruption

Trying to etch iso to usb using my Android tablet so I can install Zorin Core on my brother's laptop.
EtchDroid notification says Write finished. Zorin-OS-15.1-Core-64-bit-r2 successfully written to SanDisk Cruzer Glide. (32G)
Drive storage on my Android tablet says Zorin OS 15.1 Core 64bit corrupted.
When Lenovo 110S laptop is booted from usb, drive screen is blank. No install window.
Downloaded Zorin directly from site using Chrome on Android Tablet.
Writing iso directly from download directory without moving it.

Any ideas?

Are you living in a country that does not allow certain video codecs? That is what r numbers refer to. You should also check that the iso against its md5 or SHA sum before creating install media.

I'm in the United States. I downloaded from the Zorin website and do not see a hash sum available.

Popeye wrote:Drive storage on my Android tablet says Zorin OS 15.1 Core 64bit corrupted.

When things go wrong...
How many attempts have you made?

Checksum is a bit hard to find. It is on Installation Help page. But here is a list:
ISO sha256 checksum
Zorin OS 15.1 Core 64-bit 39ddfeb72dfc9cd22ed007a3cc16d4b949ef76365a4f7c381eedd01fbd639180
Zorin OS 15.1 Ultimate 64-bit 6ee349d1a7f9854cbc802ecce4cb453aaf985d23a61ddf40b57ffb6932a373d9
Zorin OS 15.1 Education 64-bit a1c1adaa5809ec80baf3a7bc997df9560a860e794f38f405a3ae386a9b521b27
Zorin OS 15.1 Lite 64-bit dbf629913c291143ad3d8b520bc070dbaafff66716d4cf3d73f284a879809df2
Zorin OS 15.1 Lite 32-bit 718794aaec77ce227d618ec51f32f1bdff6c0d4d7c92fe38d4990dd9a15427a5
Zorin OS 15.1 Ultimate Lite 64-bit 0229c927538cdcafc9708a242009a646e51be9f63e70ace697e99f9380296fb2
Zorin OS 15.1 Ultimate Lite 32-bit c1108f3afdeebdfa2936fdabd270795c164fb398df27ee30450070eae9d166ee
Zorin OS 15.1 Education Lite 64-bit 1ba9477b3bab8685726bff78d4ecde97d1c92e421f7aee129b879f709264f2b9
Zorin OS 15.1 Education Lite 32-bit 851c60cf5918a0432d38aaefae2a1a6209d1bc1c7dc087ff131d75db4f654da5

Interestingly, on that same page, it says:

TIP

It's recommended to download Zorin OS using the latest version of Firefox or Google Chrome without any third-party download managers. This helps avoid corrupting the file.

I think if you had used a download manager, you would have mentioned it, but it's better to raise that just in case.

Also the hash files are there, just hidden - another forum member pointed this out.

viewtopic.php?f=4&t=15174&hilit=+checksums#p67826

Thanks guys. Well the checksums match so this exonerates the folks at Zorin. I guess I'll have to bat the ball back into Davide Depau, the developer of EtchDroids side of the court. I had emailed him previously but he has not responded.

Popeye wrote:Thanks guys. Well the checksums match so this exonerates the folks at Zorin. I guess I'll have to bat the ball back into Davide Depau, the developer of EtchDroids side of the court. I had emailed him previously but he has not responded.

I know this may seem goofy to ask- But how many attempts have you made?
A corruption on download, in etching, in installation- any could happen on occasion. Some are never noticed and corrected once installation is finished due to updating once connected to the net.

Also USB thumb drives don't last forever. I would have used Rufus on a Windows Machine - I don't trust Android devices (even though my smart phone is currently using it - I need to replace it with E if I can succesfully do it on my old One Plus 3).

I have made four attempts. The usb is only temporary. I hope to install the OS directly on the laptop. Unfortunately all I have at the moment is my Android tablet.

I used to have several machines and played with a few distros back in the day but I have been out of the game for quite awhile now.

I'll take another crack at it.

Popeye wrote:I have made four attempts. The usb is only temporary. I hope to install the OS directly on the laptop. Unfortunately all I have at the moment is my Android tablet.

I used to have several machines and played with a few distros back in the day but I have been out of the game for quite awhile now.

I'll take another crack at it.

I think four attempts- we cannot say that it was a fluke. Something is clearly interfering.
Can you give more detail on how you are using the Tablet- what the tablet is (make, model) and the general procedure you are following?

Same result. ISO corrupt, blank screen on laptop boot.

I am using a Samsung Galaxy Tab A SM-T580 running Android 8.1
I downloaded directly from the Zorin website using up to date Chrome Web browser.
No glitches in downloading. Cheksums match.

Downloaded EtchDroid from Google Play Store. Initially there was a bug which caused app to crash upon reading USB drive but the developer corrected it. EtchDroid appears to successfully write iso to usb. Upon completion usb cannot be seen in directory stack. Android system storage sees usb drive but states the iso is corrupt. I have formatted the usb and tested storing files on it without issue.

I tried again using a newer usb drive. A 32G Samsung Flash Duo. Same results.

I feel your pain. THough it has been about a year since I experienced similar issues with USB booting, I recall that at that time, I called it quitso on the USB and burned to a Disk and moutned it from the dvd drive, solving the problem once and for all.
Now, I have a million disks with a million different distros on them. But... I can use either of my two USB sticks at will for any other purpose...
My toughbook has no optical DVD drive, so I had no choice but to install by USB on that- and it installed problem-free. I got lucky,

Forgot the obvious here - are you able to format the USB drive to FAT32? That is what you need to do when putting a Linux iso to USB.

The file system type did cross my mind at one point. I cannot find an app to format with a specific type so I installed a terminal emulator and shook the rust off my unix commands. I am still working on being able to access the usb drive. I found the identifier but cannot determine the specific path yet. The android shell is limited and the tablet is not rooted. (Something I will do at some point.) I'm going to try again tomorrow.

Which would be better, FAT32 or exFAT?

FAT32 and Gparted can do it.

Code:

sudo apt-get install gparted