Wherever I look on the internet I read that there is no difference
between TF cards and MicroSD cards.
But I have never been able to boot any of my various Pi using TF cards.
They just do not boot!
What am I missing?
(Apart from not seeing the letters TF in the adverts)!
On 5/20/24 09:03, nev young wrote:
Wherever I look on the internet I read that there is no difference
between TF cards and MicroSD cards.
But I have never been able to boot any of my various Pi using TF cards. They just do not boot!
What am I missing?
(Apart from not seeing the letters TF in the adverts)!
https://www.makeuseof.com/what-is-a-tf-card/
Knute Johnson <knute2024@585ranch.com> wrote:
On 5/20/24 09:03, nev young wrote:
Wherever I look on the internet I read that there is no difference
between TF cards and MicroSD cards.
But I have never been able to boot any of my various Pi using TF cards.
They just do not boot!
https://www.makeuseof.com/what-is-a-tf-card/
So TF == microSD.
OP, what cards are you having problems with? Where did you buy them from? Any chances they are fakes?
Both bought from, and returned to Amazon.
and yes, of course, they could be fakes.
these : https://www.amazon.co.uk/dp/B0BLSDMRSW?psc=1&ref=ppx_yo2ov_dt_b_product_details
and these:
http://nevilley.org.uk/tmp/Untitled.png
All of these cards do work and store the advertised amount of data.
Using Raspi imager as well as Linux program Disks to write/read/verify
64Gb images and run benchmarks, which do work but show very low
read/write speeds. (~9Mb/s).
On 22/05/2024 08:10, nev young wrote:No. They get re-formatted to EXT4 during the imaging process.
Both bought from, and returned to Amazon.
and yes, of course, they could be fakes.
these :
https://www.amazon.co.uk/dp/B0BLSDMRSW?psc=1&ref=ppx_yo2ov_dt_b_product_details
and these:
http://nevilley.org.uk/tmp/Untitled.png
All of these cards do work and store the advertised amount of data.
Using Raspi imager as well as Linux program Disks to write/read/verify
64Gb images and run benchmarks, which do work but show very low
read/write speeds. (~9Mb/s).
No chance the exFAT format is the problem?
I've never used more than 32 GB cards.I have 3 Pi using 64Gb cards without a problem. The rest use 8 or 32GB
The slow speed is implied in the spec.Cut from the ad --
On 20/05/2024 17:37, Theo wrote:
Knute Johnson <knute2024@585ranch.com> wrote:
On 5/20/24 09:03, nev young wrote:
Wherever I look on the internet I read that there is no difference
between TF cards and MicroSD cards.
But I have never been able to boot any of my various Pi using TF cards. >>> They just do not boot!
https://www.makeuseof.com/what-is-a-tf-card/
Yup. seen all of that before.
So TF == microSD.
and yet they don't work! At least for me.
Has anyone ever booted a Pi (of any sort) using a TF card?
OP, what cards are you having problems with? Where did you buy them from? Any chances they are fakes?
Both bought from, and returned to Amazon.
and yes, of course, they could be fakes.
these : https://www.amazon.co.uk/dp/B0BLSDMRSW?psc=1&ref=ppx_yo2ov_dt_b_product_details
and these:
http://nevilley.org.uk/tmp/Untitled.png
All of these cards do work and store the advertised amount of data.
Using Raspi imager as well as Linux program Disks to write/read/verify
64Gb images and run benchmarks, which do work but show very low
read/write speeds. (~9Mb/s).
I usually use SanDisk too but had run out of the 64Gb cards.
The 32Gb cards in use, in security cameras, are getting past 92% full on
one of the cameras, hence me wanting a larger card.
... very low read/write speeds. (~9Mb/s).
On Wed, 22 May 2024 08:10:27 +0100, nev young wrote:
... very low read/write speeds. (~9Mb/s).
Are you sure that’s 9Mb/s, rather than, say, 9MB/s?
nev young <newsforpasiphae1953@yahoo.co.uk> wrote:
On 20/05/2024 17:37, Theo wrote:
Knute Johnson <knute2024@585ranch.com> wrote:Yup. seen all of that before.
On 5/20/24 09:03, nev young wrote:
Wherever I look on the internet I read that there is no difference
between TF cards and MicroSD cards.
But I have never been able to boot any of my various Pi using TF cards. >> >>> They just do not boot!
https://www.makeuseof.com/what-is-a-tf-card/
So TF == microSD.
and yet they don't work! At least for me.
Has anyone ever booted a Pi (of any sort) using a TF card?
There's no such thing as a TF card, aside from 20 year old ones.
MicroSD and TF are one and the same.
OP, what cards are you having problems with? Where did you buy them from? >> > Any chances they are fakes?
Both bought from, and returned to Amazon.
and yes, of course, they could be fakes.
these :
https://www.amazon.co.uk/dp/B0BLSDMRSW?psc=1&ref=ppx_yo2ov_dt_b_product_details
and these:
http://nevilley.org.uk/tmp/Untitled.png
So you got 2x512GB for £20? That sounds exceedingly dodgy. Currently a single Sandisk 512GB card is £40.
No idea about the 'Kootion' cards - but I'd stick to known brands, and avoid those shipped by marketplace sellers.
All of these cards do work and store the advertised amount of data.
Using Raspi imager as well as Linux program Disks to write/read/verify
64Gb images and run benchmarks, which do work but show very low
read/write speeds. (~9Mb/s).
I'm not sure Raspi-imager will notice the card is fake. It'll write the 1-4GB image it has to the card, and if the card has let's say an 8GB real capacity then everything will go fine and it'll verify correctly. But as soon as you start using more of the card beyond the first 8GB - eg the first time boot which resizes the partition to use the whole card - then it'll start silently overwriting the OS.
Theo
I'm not sure Raspi-imager will notice the card is fake. It'll write the 1-4GB image it has to the card, and if the card has let's say an 8GB real capacity then everything will go fine and it'll verify correctly. But as soon as you start using more of the card beyond the first 8GB - eg the first time boot which resizes the partition to use the whole card - then it'll start silently overwriting the OS.
you can test the card with "badblocks -o /report -t random -swv /dev/your_sd" and see the report.
You can use f3write / f3read.
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