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Old 06-29-2025, 04:01 AM   #51 (permalink)
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Hmmm mine goes somewhere and check time during boot
Thanks.

pimylifeup.com/raspberry-pi-time-sync/

We shall see.

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Old 06-29-2025, 06:10 AM   #52 (permalink)
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Originally Posted by freebeard View Post
They both have fans. The Pi 4 has the temp displayed in the menu bar.

Of course. The issue is the Real Time Clock. I have to edit Date in the Terminal occasionally.
Yes, but stacked..? :
Will the fans have enough intake space to draw air into the fan?
Any HVAC technician will tell you that you always leave a space at least as much as the fan diameter for it to intake/exhaust air from/to. At LEAST..!
Without that much space they tend to run (blades) stalled, which means they are then more noise makers than fans.

Electronics 'CAD kiddies' may be 'the worlds best' at designing PCBs for various computing components,
BUT!!!
They are absolutely F-clueless! when it comes to very basic aero and basic thermal cooling! (rules of thumb)
As in; an ant in a burrow is more aware of a passing Jumbo 747 at 50 000 feet than they are of any cooling gumption whatsoever!

A good example is the new RPi5's stock cooler.
There they have a fan trying to blow through what!? opening between the fins vs the HS's other more open to airflow through the fins side.
That means that the RPi5's ...'Official' FAN is in fact 'running' in a stalled state.
ie: They have taken a fan and turned it into a noise maker rather than a fan.
Take a look for yourself with your aero hat on... Not looking anywhere near optimal is it!? Obviously the HS is designed for a fan from above...

I took one look and mentally tossed their official cooling solution on my now huge 'idiot's best try at cooling' virtual trash pile!

If you are an audio/music type, noise isn't on your list of 'yes-please!' is it!?
But hey: It's on already (least personal effort) and 'OH-so-Official!'
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Old 06-29-2025, 07:25 AM   #53 (permalink)
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I had a look at the Dave's Blog post. zswap sounds reasonable
Ah... A hint as to what you consider most of my scribblings to be!?

Most of my 'yet more crazyness' here has been about write caching.
Yes-Yes; the general consensus is "You have to be crazy! You'll lose data!!"
What data? Data I can download off the net in 5 minutes if I haven't already:
(ready to go OS images on cheap thumb drives)
Or data that I have personally created like photos and my crazy scribblings!?

All my stuff automatically does a daily, incremental backup to a 2nd physical drive.
Incremental backup works out to basically nothing daily on Linux (updates excepted) and a huge pile of, never read, log files and logs of logs of logs on Windblows.
Any personally created files are then also auto backed up to the various free online storage places (OneDrive etc)

EVERYBODY does backups right!?
Those who don't fully deserve to wait and wait and wait for their systems, with no clue to just how fast write caching makes a system!
Then cry when the drive fails (from all the tiny writes) anyway and they have no idea/practice in OS installing and backup/restore!

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and It reminds me I've got a USB camera I could try.
To set up a swap file on?

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the Pi 4 .
Are you using that to run PiHole only? Or as a 2nd system?
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Old 06-29-2025, 12:24 PM   #54 (permalink)
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Ah... A hint as to what you consider most of my scribblings to be!?
What? The fact I responded to someone else? Don't take it personally.

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To set up a swap file on?
Obsess much? It's in a box of parts and cables. I also have a Firewire camera somewhere.

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Are you using that to run PiHole only? Or as a 2nd system?
It currently fails boot, waiting for a fresh SD card. I currently have other priorities, like.... nevermind.
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Old 06-29-2025, 09:04 PM   #55 (permalink)
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Originally Posted by Logic
Yes, but stacked..? :
Will the fans have enough intake space to draw air into the fan?
Any HVAC technician will tell you that you always leave a space at least as much as the fan diameter for it to intake/exhaust air from/to. At LEAST..!
Without that much space they tend to run (blades) stalled, which means they are then more noise makers than fans.
I had the Pi 4 in a wall-mount bracket (one of the two most useful things I 3D printed). Were I to stack them, with one or two expansion cards, they'd be [heat sink fins] vertical with a fan at the top or bottom.
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Old 06-30-2025, 09:01 AM   #56 (permalink)
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What? The fact I responded to someone else? Don't take it personally.
[shrug] It was I who posted the link to Dave?

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Originally Posted by freebeard View Post
Obsess much? It's in a box of parts and cables. I also have a Firewire camera somewhere.
I just couldnt figure out how a camera fitted into the current discussion?

But yes! Similar to your Open Source obsession...
Ever since the HDD days of my 17 servers and 700+ workstations in a 3 LAN WAN setup.
There ReadyBoost ran on 2 USBs per server (RAID 0) and the many backup HDDs were all set up with a, small enough to fit in DRAM buffer, pagefile partition.
With Write caching enabled!
Even the internet was cached, with Squid.
The cheapskate bosses loved it! As did users. (unknowingly)

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It currently fails boot, waiting for a fresh SD card. I currently have other priorities, like.... nevermind.
Well there is a lot of talk of the SD Association's SD Formatter fixing SD cards.
They also run faster.

While it's open: "The Swiss army knife of cloud storage"
A lot of those cloud storage vendors have a small free storage option.

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