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by jerrm
Tue Aug 13, 2019 5:43 pm
Forum: General discussion
Topic: USB problem on Pi 4B
Replies: 35
Views: 4195

Re: USB problem on Pi 4B

Bear in mind that the usual health warning for rpi-update applies - it may break stuff on your system, and there is no automatic way of getting back to the kernel and firmware you had before rpi-update ran. Understood and not a problem. Nothing I care about installed, and I have "buster lite + my b...
by jerrm
Tue Aug 13, 2019 5:02 pm
Forum: General discussion
Topic: USB problem on Pi 4B
Replies: 35
Views: 4195

Re: USB problem on Pi 4B

andrum99 wrote:
Tue Aug 13, 2019 3:28 pm
See https://github.com/raspberrypi/linux/pull/3147
I was preparing a bug report, but would happily test this first.

I see the commit in github. Do you know how soon should this be seen in an rpi-update? Are the builds nightly/weekly/etc?
by jerrm
Mon Aug 12, 2019 6:04 pm
Forum: General discussion
Topic: USB problem on Pi 4B
Replies: 35
Views: 4195

Re: USB problem on Pi 4B

I will run with UAS blacklisted for now. Maybe there is some kind of bug in this particular USB to SATA bridge? Maybe, but I wouldn't jump to that conclusion. After trying multiple adapters, I've come to the conclusion something is "off" for USB3/UAS on the Pi. Several adapters that work great with...
by jerrm
Mon Aug 12, 2019 2:18 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

Yeah, for small runtimes we can get large swings with all the unknowns of networking traffic or my USB keyboard interrupts. To mitigate that, here's a script to run 50 times and get a histogram: #!/bin/bash -e rm -f real.txt touch real.txt for ((i=1; i<=50; i++)); do { time ./target/release/iba-3 >...
by jerrm
Mon Aug 12, 2019 1:41 pm
Forum: General discussion
Topic: 64-bit weekly kernel autobuilds for RPi4 released (bcm2711_defconfig)
Replies: 94
Views: 13550

Re: 64-bit weekly kernel autobuilds for RPi4 released (bcm2711_defconfig)

Could there be any config/compile differences other than 32 bit vs 64 bit impacting the results? Config differences including but not limited to: * sakaki's image defaults to total_mem=1024 . Did you change that before running your test? Having less memory available probably can't speed things up, ...
by jerrm
Sun Aug 11, 2019 7:49 am
Forum: General discussion
Topic: 64-bit weekly kernel autobuilds for RPi4 released (bcm2711_defconfig)
Replies: 94
Views: 13550

Re: 64-bit weekly kernel autobuilds for RPi4 released (bcm2711_defconfig)

I did some testing using Sakaki's 64 bit Buster image and was surprised by how much of a performance gain there was for my test case. See https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=247959&start=100#p1517081. Could there be any config/compile differences other than 32 bit vs 64 bit impac...
by jerrm
Sun Aug 11, 2019 7:38 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

I finally downloaded Sakaki's 64 bit image and did some testing of a rather mundane, un-sexy daily job. Pure Rasbian took 26% longer than the 64 bit config. The test restores about 103GB of disk images from an unencrypted zbackup datastore from/to a USB3 attached SSD. This is a real world task execu...
by jerrm
Thu Aug 08, 2019 4:14 pm
Forum: Troubleshooting
Topic: Backing up 32 GB SD card on Windows 10
Replies: 8
Views: 544

Re: Backing up 32 GB SD card on Windows 10

One caveat is that not all 32GB cards are exactly 32GB, so in the worst case if you have to restore the back-up onto another card (or just make a clone) you can occasionally find that the backup is too large to write back to the card if the new one is marginally smaller than the original. Yeah, I'v...
by jerrm
Wed Aug 07, 2019 10:55 pm
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 63
Views: 7392

Re: Which SSD to buy for raspberry pi?

Maybe I should report this as a bug but I see there's a closed bug for this controller which says everything works well with USB quirks enabled. It's too bad, it's a nice little package and the SSD is surprisingly fast. The drive is likely OK, if you can find a working adapter. Quirks is a work aro...
by jerrm
Wed Aug 07, 2019 9:56 pm
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 63
Views: 7392

Re: Which SSD to buy for raspberry pi?

First thing I did when I encountered problems. It didn't make any difference and it's not needed on the 3B+ which boots from it now. All but one really old JMicron bridge has been OK for me with quirks, was hoping the same for you. Pi4 USB3 has issues though. I originally assumed it was generic Lin...
by jerrm
Wed Aug 07, 2019 9:32 pm
Forum: Beginners
Topic: autostart and minidlna and vncserver
Replies: 5
Views: 195

Re: autostart and minidlna and vncserver

systemd manages most startup and service tasks on current versions of Raspbian.

"service" is and older sysVinit command. Still around for compatibility sake, but your better off not using it. Google/learn about systemd.
by jerrm
Wed Aug 07, 2019 2:44 am
Forum: General discussion
Topic: Which SSD to buy for raspberry pi?
Replies: 63
Views: 7392

Re: Which SSD to buy for raspberry pi?

Unfortunately this won't work in my Pi4, it causes severe instability (stalled booting, locking up the desktop, locking up the USB bus), but it works perfectly in my Pi3B+. I suspect it's the JMicron controller in the enclosure. USB 3.0 support in the Pi4 is new and I'm hoping various bugfixes will...
by jerrm
Wed Aug 07, 2019 1:38 am
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

BTW, Microsoft has been supporting both 32-bit and 64-bit versions of Windows for 12 years now. Of course Microsoft has plenty of resources to do this. More like 18 years, as have virtually all linux distros. I hate to quibble but while it was true a test version of 64-bit linux was demonstrated in...
by jerrm
Tue Aug 06, 2019 10:14 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

BTW, Microsoft has been supporting both 32-bit and 64-bit versions of Windows for 12 years now. Of course Microsoft has plenty of resources to do this. More like 18 years, as have virtually all linux distros. Hopefully there are making higher margins on the 2GB and 4GB boards to justify some extra ...
by jerrm
Tue Aug 06, 2019 9:25 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

Windows XP proffesional x64 edition was released in april 2005, about 2 years after the first x86-64 chips started shipping. Unfortunately windows XP proffesional x64 edition was only available through the OEM and volume license channels, not retail and most computer vendors either didn't offer it ...
by jerrm
Tue Aug 06, 2019 5:13 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

therefore 128bit is also inevitable... as well as 256bit.... so on and so forth....( but it doesn't have be overnight). <-- borrowing this ;) The difference being that 64bit OS's have been common and mainstream for pushing 15 years or so, and the default OS platform on desktops for 10 years. But br...
by jerrm
Tue Aug 06, 2019 3:14 pm
Forum: General discussion
Topic: Why moving to 64bit?
Replies: 259
Views: 24474

Re: Why moving to 64bit?

The same no/limited benefit arguments were made for 32 bit, and will be made for the next generation. I agree 64 bit vs 32 bit is irrelevant for most workloads, but some do benefit. Beyond the number of bits are the compiler optimizations that can be enabled leaving older CPU support behind, and is ...
by jerrm
Tue Aug 06, 2019 12:57 am
Forum: Networking and servers
Topic: Wireless AP, but reversed?
Replies: 7
Views: 1559

Re: Wireless AP, but reversed?

Try the attached script and report back. This is a first draft. setup wireless on a fresh Buster install using raspi-config or gui tools Cut and paste below into console (downloads below file - check link url to confirm if paranoid) wget -O - https://www.raspberrypi.org/forums/download/file.php?id=3...
by jerrm
Mon Aug 05, 2019 2:32 pm
Forum: Troubleshooting
Topic: Pi 4, rootfs on SSD goes readonly
Replies: 19
Views: 1413

Re: Pi 4, rootfs on SSD goes readonly

Also meant to mention (was posting when I should have been asleep)... I have seen ASMedia and JMicron adapters that are solid under PC Linux that have issues on the Pi. If lsusb -t shows the UAS driver being used, try quirks to disable UAS (even if not needed on PC Linux). Something is not right wit...
by jerrm
Mon Aug 05, 2019 5:15 am
Forum: Troubleshooting
Topic: Pi 4, rootfs on SSD goes readonly
Replies: 19
Views: 1413

Re: Pi 4, rootfs on SSD goes readonly

It could be the USB-SATA adapter you are using (although mine is also using an ASMedia controller).not be relevant to Pi4). Unfortunately that doesn't mean much. I've been testing controllers and have three asmedia controllers on my bench now. All with different chip revisions, but report the same ...
by jerrm
Fri Aug 02, 2019 6:44 pm
Forum: Networking and servers
Topic: Raspberry Pi able to run PiHole and network bridge?
Replies: 2
Views: 461

Re: Raspberry Pi able to run PiHole and network bridge?

Assuming the PiHole is wired to the main router, try the second part of the link above starting at the " Using the Raspberry Pi as an access point to share an internet connection (bridge). " line. IGNORE EVERYTHING ABOVE THAT LINE. Or follow the 7/31/2019 post by Ernst in https://www.raspberrypi.org...
by jerrm
Thu Aug 01, 2019 8:28 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 8986

Re: 4gb - 4B Demand must be high.

jerrm wrote:
Wed Jul 31, 2019 7:03 pm
Same at my Micro Center. 1GB boards have been almost always in stock. But no 2GB/4GB boards. I managed to grab a 2GB board early on, but I don't think my store has had them back in since.
Both MicroCenters here show 2GB stock today just to prove me wrong.
by jerrm
Thu Aug 01, 2019 6:27 pm
Forum: Beginners
Topic: 5V 3A charger?
Replies: 6
Views: 296

Re: 5V 3A charger?

As long as it is 5 Volts, it should be OK if the supply is capable of higher amperage.

DO NOT use anything with a higher voltage rating - bad things can happen in that scenario.
by jerrm
Thu Aug 01, 2019 4:54 pm
Forum: General discussion
Topic: NVMe Enclosures
Replies: 6
Views: 362

Re: NVMe Enclosures

It will - thus my interest. I have a M.2 NGFF enclosure but when burning an image to it from my PC, it is way slower than the Sabrent/OCZ setup. The Sabrent/OCZ will burn the Raspbian Buster with desktop image in about 24 seconds - I don't want to go slower :) There shouldn't be any difference if a...
by jerrm
Thu Aug 01, 2019 4:48 pm
Forum: General discussion
Topic: NVMe Enclosures
Replies: 6
Views: 362

Re: NVMe Enclosures

given the Pi can only reach 80% of full USB3.0 speeds It isn't 80%. They're the same. The advertised 5Gbps for USB3.0 is after the 8b/10b encoding so maximum actual throughput is 4Gbps once you remove that. PCIe 2.0 uses 8b/10b encoding as well and the advertised 4Gbps for a x1 link is before encod...

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