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by Brad Q
Fri Nov 15, 2019 10:26 am
Forum: General discussion
Topic: Worse USB speed on RPI 4 than RPI 3 B
Replies: 13
Views: 447

Re: Worse USB speed on RPI 4 than RPI 3 B

Your PC getting 26, pi3 getting 20, and pi4 getting 15 is pointing to something going on. I would expect the PC to have the most excess power, followed by running the PI3 with an oversized power supply (3A vs 2.5A), followed by the Pi4 running the standard sized power supply for it(3A). The reason I...
by Brad Q
Fri Nov 15, 2019 4:22 am
Forum: General discussion
Topic: Worse USB speed on RPI 4 than RPI 3 B
Replies: 13
Views: 447

Re: Worse USB speed on RPI 4 than RPI 3 B

First just to make sure: you understand that MBps is Megabytes per second and Mbps is Megabits per second? For instance gigabit Ethernet is 1000Mbps but only 125MBps(theoretically). The limitation came about in discussing the SD card reader vs a USB device (40MBps vs 350MBps). I took a quick look ar...
by Brad Q
Fri Nov 15, 2019 3:37 am
Forum: General discussion
Topic: Worse USB speed on RPI 4 than RPI 3 B
Replies: 13
Views: 447

Re: Worse USB speed on RPI 4 than RPI 3 B

First, that is a LOT of devices to be running off the Pi all at once. There are a couple of potential problems there, power and bandwidth. IF I remember correctly the USB total bandwidth for the Pi4 is 350MBps(MB not Mb), so you could be running into an issue there. Second the power draw of the Pi4 ...
by Brad Q
Fri Nov 15, 2019 3:18 am
Forum: General discussion
Topic: Worse USB speed on RPI 4 than RPI 3 B
Replies: 13
Views: 447

Re: Worse USB speed on RPI 4 than RPI 3 B

You might try a lsusb and look and see if there is a compatibility issue with that device.
by Brad Q
Thu Nov 14, 2019 10:16 pm
Forum: General discussion
Topic: Worse USB speed on RPI 4 than RPI 3 B
Replies: 13
Views: 447

Re: Worse USB speed on RPI 4 than RPI 3 B

Not sure if it would make a difference but are you using the 2.0 us ports on the Pi4 or the 3.0 ports?
by Brad Q
Thu Nov 07, 2019 10:41 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian from USB Devices : Made Easy

I suspect that this is something you have done that is not (at least directly) related to usb-boot. As I stated above my system behaves "normally". Everything is auto mounted that same as it was before the use of usb-boot.
by Brad Q
Wed Nov 06, 2019 10:48 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian from USB Devices : Made Easy

I just checked on my 4-4GB and it sees all four ports as well. Tested by moving USB stick from port to port.
by Brad Q
Wed Nov 06, 2019 9:22 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian from USB Devices : Made Easy

Ron
Thanks for making this. It has allowed me to use my Pi4 for my daily drivers. Just wondering if, when you update this, do those that have already used it to set up their systems need to do anything?
by Brad Q
Wed Oct 23, 2019 4:06 am
Forum: Beginners
Topic: Why buy 32GB or less MicroSD card when 64GB is a few dollars more?
Replies: 26
Views: 1323

Re: Why buy 32GB or less MicroSD card when 64GB is a few dollars more?

IF you are talking about the Pi4 you are MUCH better off going with a smaller card(cheaper) and running the system off of a USB device. The card reader chip is limited to 48MBps(?) while the USB chip is limited to 350MBps. Basically you put a file on the SD card that points to the USB device. RonR h...
by Brad Q
Wed Oct 23, 2019 3:58 am
Forum: Beginners
Topic: Compatible USB Dongles For HDMI In
Replies: 14
Views: 1908

Re: Compatible USB Dongles For HDMI In

The chip limit on the Pi4 USB is 350MBps(total). So inputting HDMI uncompressed is pretty much a no go at any real level. IF we knew what you were actually trying to accomplish we might be able to offer more help. VNC?
by Brad Q
Wed Oct 23, 2019 3:47 am
Forum: Beginners
Topic: Which Pi for a beginner?
Replies: 9
Views: 561

Re: Which Pi for a beginner?

I am using the Pi4-4Gb for a desktop. VERY seldom have I seen the memory usage above 50%. So if money is on the tight side dropping down to 2Gb is reasonable. The Flirc case pretty well addresses the heat issues for most users.I got mine for $20 with shipping. I push mine pretty hard and it always s...
by Brad Q
Wed Oct 23, 2019 3:35 am
Forum: Beginners
Topic: Performance vs durability (using sshfs or rsync for remote backup)
Replies: 2
Views: 116

Re: Performance vs durability (using sshfs or rsync for remote backup)

Unless something is massively setup wrong, sshfs is really not that slow. However I do not involve samba, just sshfs straight to whatever directory you are using. Depending on which PI you are using you can be better off using a flash drive for the files rather than the sd card. On the Pi4 USB(depen...
by Brad Q
Sun Oct 13, 2019 12:21 am
Forum: General discussion
Topic: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case
Replies: 68
Views: 19799

Re: Raspberry Pi 4 Heatsink vs Fan vs Flirc Case

My Flirc case typically idled at 50C in a 75F room. Under full extended(hour) load it never exceed 74C but ran up to 70C in a heartbeat. After a few months I have added a 12V 120mm fan running on 5V. One foot away it is dead quiet(the reason for using 120mm). It now idles at 36C in 75F room and neve...
by Brad Q
Fri Oct 11, 2019 8:48 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian from USB Devices : Made Easy

Ron

You seeing any performance degradation after today's update? It included a bootloader update. It could just me. But it feels a little off? It would not necessarily be due to usb-boot.
by Brad Q
Sun Aug 18, 2019 11:18 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

Tried changing the fstab back and got the same result. This was while you posting. " cat /etc/fstab proc /proc proc defaults 0 0 /dev/mmcblk0p1 /boot vfat defaults 0 2 PARTUUID=9a9f084e-02 / ext4 defaults,noatime 0 1"
by Brad Q
Sun Aug 18, 2019 11:09 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

"fred@raspberrypi:~/Holding $ sudo ./usb-boot-test-2

SD card must remain in place to boot the USB device"

Immediately after selecting sda and hitting enter, it dies. I think it is looking for 1 but 6 is still there.
by Brad Q
Sun Aug 18, 2019 10:53 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

Before running this do I need to re-edit the fstab (6 back to 1?
by Brad Q
Sun Aug 18, 2019 10:07 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

Sure. I suspect that the Pi4 is going to open up a new avalanche of users. People looking for a cheap general desktop that uses very little power (vs 240w standard desktop)and very little space. If the 64bit version of Raspbian really winds up adding an additional 10% performance, so much the better...
by Brad Q
Sun Aug 18, 2019 9:48 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

"fred@raspberrypi:~ $ cat /etc/fstab proc /proc proc defaults 0 0 /dev/mmcblk0p6 /boot vfat defaults 0 2 PARTUUID=9a9f084e-02 / ext4 defaults,noatime 0 1 # a swapfile is not a swap partition, no line here # use dphys-swapfile swap[on|off] for that" The ls -l seems (cursory look) to match to yours as...
by Brad Q
Sun Aug 18, 2019 9:03 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

As predicted:

"/dev/mmcblk0p1 /boot "

So all I need to do is edit the fstab from 1 to 6?
by Brad Q
Sun Aug 18, 2019 6:49 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

I said from the start that I probably missed something simple. Yep, I used NOOBs.

That being said, it does work (with my one edit).

Thanks
by Brad Q
Sun Aug 18, 2019 5:20 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

mount command: "/dev/mmcblk0p7 on /media/fred/root type ext4 (rw,nosuid,nodev,relatime,uhelper=udisks2)" "/dev/mmcblk0p6 on /media/fred/boot type vfat (rw,nosuid,nodev,relatime,uid=1001,gid=1001,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,showexec,utf8,flush,errors=remount-ro,...
by Brad Q
Sun Aug 18, 2019 5:12 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

There is no /tmp/usb From sd card cmdline.txt: #dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p7 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles dwc_otg.lpm_enable=0 console=tty1 root=PARTUUID=9a9f084e-02 rootfstype=ext4 elevator=deadline ...
by Brad Q
Sun Aug 18, 2019 6:14 am
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

"fred@raspberrypi:~/Holding $ sudo ./usb-boot-test sed: can't read /tmp/usb-boot-mnt/cmdline.txt: No such file or directory SD card must remain in place to boot the USB device" To me it looks like it is trying to edit the one on the usb flash drive. Does it not want to edit the one on the micro sd c...
by Brad Q
Sat Aug 17, 2019 10:50 pm
Forum: Advanced users
Topic: Running Raspbian from USB Devices : Made Easy
Replies: 159
Views: 48940

Re: Running Raspbian on USB Devices : Made Easy

Ron Ran into a little issue. I am sure I just missed something. The script formats the drive and copies all the data over(as far as I can tell). But it does not edit the cmdline.txt file. In my case it is locate in /boot . "fred@raspberrypi:~/Holding $ sudo ./usb-boot sed: can't read /media/cmdline....

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