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(resolved) Re: crazy problem with pi4 and ssd

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On 29/05/2026 09:19, Richard Kettlewell wrote:
> Mike Scott <usenet.16@scottsonline.org.uk.invalid> writes:
>> Richard Kettlewell wrote:
>>> Mike Scott <usenet.16@scottsonline.org.uk.invalid> writes:
>>>> Hi all. I always seem to get impossible problems....
>>>>
>>>> Take a pi4 and two disks - both sata connected by a sata to usb
>>>> adapter. One is a small real disk drive, the other a Kingston
>>>> SSD. Both have been in the spares cupboard for a while.
>>>>
>>>> I put an old arm64 version of bookworm onto the spinner. Works fine.
>>>>
>>>> I put the exact same onto the ssd. Won't boot, with messages like
>>>> timed out waiting for udev to be empty
>>>> or
>>>> read error on /dev/sda [details not recorded]
>>>
>>> Boot the Pi from the spinning disk (or an SD card) and connect the
>>> SSD to the Pi. See if you can access it and if not, have a look at
>>> the kernel log.
>>
>> Already did - I ran one full pass with baddisk -w which completed with
>> zero errors.
> 
> Never heard of baddisk, what is that?

My bad - I meant 'badblocks'.

> 
> Anyway from what you’ve said, Linux on the Pi can’t see the SSD during
> early boot, but can see it when attached to the Pi later. That’s hard to
> explain, since it’s the same hardware and the same code looking for it
> in each case.
> 
> Just to check, did you run your ‘full pass with baddisk’ _on the Pi_, as
> requested above?

Yes.

The problem does look as though it was down to a combo of the ssd plus 
one particular sata/usb adapter (I have 3). Using dd, I found transfer 
rates down to <10MB with the ssd and that particular adapter.

The issue does seem to centre around the combo of ssd, that particular 
adapter, and the pi4. I get decent transfer rates using my desktop with 
all the adapters; just the pi4 has issues with that one, fine with the 
other 2.

Anyway, I have a system that has now booted several times without issue, 
which is great.

Thanks to all for commenting.


> 


-- 
Mike Scott
Harlow, England

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crazy problem with pi4 and ssd Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-05-28 16:27 +0100
  Re: crazy problem with pi4 and ssd Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-05-28 16:38 +0100
    Re: crazy problem with pi4 and ssd The Natural Philosopher <tnp@invalid.invalid> - 2026-05-28 16:47 +0100
      Re: crazy problem with pi4 and ssd bp@www.zefox.net - 2026-05-29 03:42 +0000
        Re: crazy problem with pi4 and ssd Pancho <Pancho.Jones@protonmail.com> - 2026-05-31 23:57 +0100
          Re: crazy problem with pi4 and ssd John R Walliker <jrwalliker@gmail.com> - 2026-06-01 10:35 +0100
            Re: crazy problem with pi4 and ssd Pancho <Pancho.Jones@protonmail.com> - 2026-06-02 10:11 +0100
          Re: crazy problem with pi4 and ssd NY <me@privacy.net> - 2026-06-12 20:58 +0100
            Re: crazy problem with pi4 and ssd Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-13 02:55 +0000
              Re: crazy problem with pi4 and ssd NY <me@privacy.net> - 2026-06-13 23:40 +0100
                Re: crazy problem with pi4 and ssd Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-14 05:34 +0000
  Re: crazy problem with pi4 and ssd Richard Kettlewell <invalid@invalid.invalid> - 2026-05-28 17:39 +0100
    Re: crazy problem with pi4 and ssd Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-05-28 21:30 +0100
      Re: crazy problem with pi4 and ssd Chris Townley <news@cct-net.co.uk> - 2026-05-28 23:15 +0100
      Re: crazy problem with pi4 and ssd Richard Kettlewell <invalid@invalid.invalid> - 2026-05-29 09:19 +0100
        (resolved) Re: crazy problem with pi4 and ssd Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2026-05-29 12:57 +0100
          Re: (resolved) Re: crazy problem with pi4 and ssd Daniel James <daniel@me.invalid> - 2026-05-29 15:41 +0100
          Re: (resolved) Re: crazy problem with pi4 and ssd Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-05-29 23:30 +0000
  Re: crazy problem with pi4 and ssd pitter_smith <70620b9261c622c2c6443cb36988dd78336be458fd9f13499dd358523b105d91@example.com> - 2026-06-15 20:45 +0000

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