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by RegB
Fri Sep 13, 2019 11:34 am
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 39
Views: 3009

Re: Multiple Pi's to replace W10

I see the CD/DVD drive as the least of issues, .
Plenty of USB drives available and (generally) whatever can be burned to CD/DVD as a live distro can be put on a USB stick or SD card.
Net boot ?
by RegB
Tue Sep 10, 2019 10:17 am
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 39
Views: 3009

Re: Multiple Pi's to replace W10

In my various browsing and interest in clusters I came across bccd - - bootable cluster CD. https://bccd.net Points in favor; Debian base, in fact they describe it as a thin veneer laid over Debian. Open source. There was a question (about 6 years ago) about compiling for ARM (specifically R Pi) whi...
by RegB
Wed Sep 04, 2019 6:02 pm
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 39
Views: 3009

Re: Multiple Pi's to replace W10

BTW, it may be worth mention that clusters (brambles) don't buy you much for "regular" programs, e.g. programs that have not been written (or have not been adapter/re-written) to take advantage of them. It isn't as if you can casually type "make" and expect all of your pis to volunteer their servic...
by RegB
Wed Sep 04, 2019 3:00 pm
Forum: General discussion
Topic: RPi 4 4GB not connecting to wifi
Replies: 9
Views: 745

Re: RPi 4 4GB not connecting to wifi

I don't use WEP (and can't believe anyone still does), but I seem to recall something about WEP keys not being enclosed in quotes (so, wep_key0="mybrokenpswd" should be wep_key0=mybrokenpswd). network={ ssid="MyTotallyInsecureAndOpenLAN" key_mgmt=NONE wep_key0=mybrokenpswd wep_tx_keyidx=0 } Whether...
by RegB
Wed Sep 04, 2019 1:40 pm
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 39
Views: 3009

Re: Multiple Pi's to replace W10

BTW, it may be worth mention that clusters (brambles) don't buy you much for "regular" programs, e.g. programs that have not been written (or have not been adapter/re-written) to take advantage of them. It isn't as if you can casually type "make" and expect all of your pis to volunteer their service...
by RegB
Wed Sep 04, 2019 10:03 am
Forum: General discussion
Topic: Multiple Pi's to replace W10
Replies: 39
Views: 3009

Re: Multiple Pi's to replace W10

Minor step omission on the Ubuntu dual boot thing. You will need space for it (Captain Obvious said). On contemporary size drives it is usually easy enough to find 32 or 64 Gig Before you close down Windoze resize the C partition Control panel > Administrative tools > Computer Management > Storage >...
by RegB
Wed Sep 04, 2019 2:51 am
Forum: Other projects
Topic: Pi ^4 Case Prototype
Replies: 11
Views: 4048

Re: Pi ^4 Case Prototype

Interesting, I am in search of something similar (for Pi4Bs)
Could you post the CAD files ?, i.e. the models.
.stl files are difficult to modify, but I can process most CAD formats
by RegB
Sat Aug 24, 2019 11:42 pm
Forum: Off topic discussion
Topic: double cpu's
Replies: 15
Views: 3896

Re: double cpu's

Separate question on clusters; Given that some of us have a mixture of Pies, should the most or least "powerful" of them be used as the master ? e.g. Pi 4 with 4 Gig RAM at 1500MHz or Pi 3 with 1 Gig RAM at 1200MHz ? I don't know that there is a general answer to that. Within a unix/Linux system, i...
by RegB
Wed Aug 21, 2019 1:16 pm
Forum: Off topic discussion
Topic: Reading material for ARM architecture?
Replies: 4
Views: 1470

Re: Reading material for ARM architecture?

RISC and CISC form an interesting contrast. My own experience involved dec's VAX line, which in its day could have been described as ECISC. (Extremely complex instruction set) They were difficult to develop and debug - development cost and time to market issues. My personal tag line at that time was...
by RegB
Wed Aug 21, 2019 12:10 pm
Forum: Off topic discussion
Topic: double cpu's
Replies: 15
Views: 3896

Re: double cpu's

Use something like this http://www.bitscope.com/product/blade/?p=about Plenty of Pi clusters and drambles around, a google will find them. I think Pi's are made 6 to a panel, jut ask for 6 Pi's not broken out. Not sure if they will be tested? The Quattro Pi looks interesting and just about within f...
by RegB
Tue Aug 20, 2019 11:01 am
Forum: General discussion
Topic: Sage Math on the Raspberry Pi
Replies: 36
Views: 13970

Re: Sage Math on the Raspberry Pi

Hi, I'm new to raspberry pi but NOT new to SAGE, which I have been building in virtual box since 4.something (Not new to computers for that matter; LEO II, LEO III, KDF-9, etc.) Anyway, sage 8.8 built from source "straight out of the box" on a Pi 4 last night in a little over 6 hours - without docs,...
by RegB
Wed Jul 31, 2019 1:36 am
Forum: General discussion
Topic: RPi 4 4GB not connecting to wifi
Replies: 9
Views: 745

Re: RPi 4 4GB not connecting to wifi

My 4GB quit connecting to Wi-Fi after I switched to Ethernet for a while. I can't say for certain what the cause is but I used it for a good week on Wi-fi before switching to ethernet and now I can't connect to Wi-fi if I disconnect the ethernet cable. I haven't done any extensive troubleshooting (...
by RegB
Tue Jul 30, 2019 12:43 pm
Forum: General discussion
Topic: RPi 4 4GB not connecting to wifi
Replies: 9
Views: 745

Re: RPi 4 4GB not connecting to wifi

Thanks, The only thing missing in my wpa_supplicant.conf file was the line; wep_tx_keyidx=0 I added that but it made no difference - and once I tried to connect that line got magically deleted - this is repeatable, even through reboot that line gets deleted. I'm going to have to do some in depth rea...
by RegB
Mon Jul 29, 2019 10:23 pm
Forum: General discussion
Topic: RPi 4 4GB not connecting to wifi
Replies: 9
Views: 745

Re: RPi 4 4GB not connecting to wifi

Same/similar symptoms here. Westell 327 modem, using same WEP code as everything else in the house. Initial install; selected USA location, US keyboard, British English, etc. It detects the westell and presents the correct name, just doesn't connect when I enter the WEP key. Have tried editing wpa_s...

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