Re: 13.0-RELEASE Poor performance on Raspberry pi 3 B+

Thank you Mark for the list !

A friend has evo and kingston, where are going to try them.

El vie, 26 nov 2021 a las 15:40, Mark Millard (<[email protected]>)
escribió:

> On 2021-Nov-26, at 11:04, Mark Millard <[email protected]> wrote:
>
> > On 2021-Nov-26, at 10:35, Juan David Hurtado G <[email protected]>
> wrote:
> >
> >> Thank you so much for your time you all.
> >>
> >> New microSD arrived today. It is a SanDisk Ultra, see this on the
> Raspberry
> >> pi 3B+:
> >>
> >> ```
> >> root@generic:~ # dmesg | grep -i mmc
> >> mmc0: <MMC/SD bus> on sdhci_bcm0
> >> mmcsd0: 32GB <SDHC SD32G 8.5 SN A0169EA9 MFG 04/2021 by 3 SD> at mmc0
> >> 50.0MHz/4bit/65535-block
> >> ```
> >>
> >> 50 MHz !! What a relief.
> >>
> >> Other OS like RaspiOS and NetBSD runs well on the other cards, not sure
> >> why. I still don't understand why sandisk is the only brand that works
> for
> >> FreeBSD apparently.
> >
> > I have non-sandisk microsd cards that work fine --and other sandisk
> > models of microsd cards that also work. Mostly I use non-ultra sandisk
> > ones as it turns out.
>
> Some of these are not intended as high performance for
> the type of context and some may not perform as well
> as others, even if intended is high performance. I'm
> just listing ones that have historically seemed to
> work okay in my use:
>
> Transcend High Endurance microSDHC
> Kingston microSDHC I Industrial
> Samsung EVO+ microSDHC I
> Samsung EVO PLUS microSDXC I
> SanDisk Extreme microSDHC I (A1)
> SanDisk Extreme microSDXC I (A2)
> SanDisk Extreme PLUS microSDXC I (A1)
> SanDisk Ultra microSDHC I
> SanDisk Ultra microSDXC I
> SanDisk Ultra microSDXC I (A1)
>
> So far all of these have worked. None of them are
> recent purchases. I've never observed a small
> MHz figure for any of them, as far as I remember
> anyway.
>
> I'm not claiming RPi* use of the fastest modes some
> of the miscrosd cards are capable of.
>
> > But once I could boot via USB I no longer use microsd cards very
> > often in the RPi*'s that can boot from USB without a microsd card
> > involved.
> >
> >> I'm willing to give more information if needed or even to open a ticket
> in
> >> bugzilla if you find it useful.
> >
> > It does not seem that my direction of activity is
> > relevant if it is media-type specific for the behavior.
> > So I'll not be experimenting further with any RPi4B's
> > (or otherwise).
> >
> > But if you make a bugzilla report, various things about
> > your RPi* configurations that you have reported would be
> > appropriate to include as context.
> >
> >> Have a great weekend !!
> >>
> >> PS: I've also bought the usb ttl cable if I can give any more
> information
> >> using the other card via serial console.
> >
> > There are various settings for getting more debug
> > output on the serial console for the RPi* stages
> > of things. Some go in the config.txt but one goes
> > in the eeprom content. As stands it does not seem
> > that such would have helped for the specific problem:
> > The problem is later, after the RPi* eeprom and
> > firmware stages.
> >
> > You may never need such, but at least you are forwarned
> > about the possibility if you think it might help
> > something in the future.
> >
>
>
>
>
> ===
> Mark Millard
> marklmi at yahoo.com
> ( dsl-only.net went
> away in early 2018-Mar)
>
>

-- 
Juan David Hurtado G
(+57) 319 252 3773
www.orbiware.com