My drive is in a thin extruded aluminum case and is seldom more than just a bit warm to the touch. I'm not doing anything on this computer that is particularly filesystem-intensive. It's been plugged directly into the Pi and has had uptimes of three days. I've never seen the little 'lightning' icon come on that might indicate a sag in power. The Pi is powered by a 3 amp USB C power supply, and that seems to be handling the load quite well. The highest transfer speed I've seen on reads is about 275 MB/sec., far below the actual capability of the NVMe stick itself.
On Mon, May 24, 2021 at 4:24 PM Csaba Toth <[email protected]> wrote: > Especially high speed NVMe SSD drives can dissipate a lot of heat and > that's just part of the energy they consume. Modern laptop designs have > heat conducting foams lay on top of the chips of the NVMe and spread that > heat to a larger area for dissipation. I can easily imagine the Pi may not > handle that well. > > On Sat, May 15, 2021 at 2:32 PM Howard White <[email protected]> wrote: > >> 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 >> > > >> > > -- >> > > -- >> > > You received this message because you are subscribed to the >> Google >> > > Groups "NLUG" group. >> > > To post to this group, send email to [email protected] >> > <mailto:[email protected]> >> > > To unsubscribe from this group, send email to >> > > [email protected] >> > <mailto:nlug-talk%[email protected]> >> > > For more options, visit this group at >> > > http://groups.google.com/group/nlug-talk?hl=en >> > <http://groups.google.com/group/nlug-talk?hl=en> >> > > 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