Curt,
The video I listed indicates that some NVMe drives draw more power than
the Pi hardware may provide.
What I have looked at but not yet endeavored is booting / file serving
the Pi via PXE and NFS. I've printed some web searches out but haven't
gotten past that point.
A potential topic for a meeting some time?
Howard
On 5/15/21 12:33 PM, Curt Lundgren wrote:
Thanks Howard, I have been following Jeff Geerling's great videos, and
the Mirko board is certainly packed with features. The part I'm having
trouble with is why the Pi boots and appears to run quite normally, for
10 - 20 minutes, then just stops accessing the NVMe drive and hangs. If
I'm streaming music, it continues to stream - but nothing else works. I
don't think it's a thermal issue, because if I unplug power and plug it
right back in, the Pi boots right up again.
Silly me for thinking this would be something that 'just works…'
On Sat, May 15, 2021 at 10:13 AM Howard White <[email protected]
<mailto:[email protected]>> wrote:
Curt,
Sorry I'm slow to respond. I also struggle with RPi and MicroSD media.
Here is a YouTube with some info about NVMe kit:
<https://www.youtube.com/watch?v=DZMF1n75Km0
<https://www.youtube.com/watch?v=DZMF1n75Km0>>
Howard
On 5/10/21 4:38 PM, Curt Lundgren wrote:
> I've set up a Pi 4 computer with 8 GB of RAM and a pair of 1080P
> displays as a second place to sit. No Email, no chats of any kind,
> rather peaceful, actually. It's running 64-bit Ubuntu, and
except for
> an occasional non-fatal complaint from one application or
another, it
> runs rather well.
>
> It's booting from a 32 GB high-endurance micro SD. The problem I've
> observed with RPi computers in the past is that they destroy
their boot
> media. Most, if not all, micro SD cards do not have wear
leveling, and
> so the constant logging and other activity eventually 'wears a
hole' in
> the media and it fails. This didn't keep my original single-core
700
> MHz Pi from setting a personal runtime record of 1503 days, but
it would
> not boot after power was restored. Added a new high-endurance
micro SD
> card to it, and it came right back up.
>
> Back in the Watkins days we were using Pi3 computers for door access
> control. Everything was rock-solid reliable - until the boot media
> would fail. That's when I hit on the idea of using the
high-endurance
> cards. I've never had one of those fail, knock on wood.
>
> I still like the idea of wear leveling, so I bought a 500 GB NVMe
drive
> and a USB 3+ enclosure. It's bloody fast when connected to a Mac
> laptop, over 900 MB/sec both read and write. I copied the Ubuntu
boot
> image onto it and plugged it into the PI4. I did have to flash
the Pi
> firmware so it will boot either from an SD card or external USB
media.
> The Pi boots up and runs beautifully - for 10 to 20 minutes, then it
> just hangs. Power cycle and it's good for another 10 - 20 minutes.
>
> Is it a power issue? I have a spare USB 3.0 powered hub, so I
plugged
> the new drive into the hub and the hub into the Pi. It looks silly,
> with the hub being substantially larger than the computer, but it
boots
> up, runs beautifully for 10 - 20 minutes - and hangs. I don't
think the
> trouble can be blamed on power supply issues, and I'm stumped as
to what
> else might be going on. I'm back on the high-endurance micro SD
card,
> but would like very much to have the added capacity and wear
leveling
> the SSD offers.
>
> Speed through the hub was dismal at about 32 MB/sec., pretty much
USB
> 2.0 performance, but that would have been OK if the Pi would run
and not
> lock up.
>
> Does anyone have any thoughts as to what might be going on here?
>
> Thanks
> Curt Lundgren
>
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