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by zeitalex
Wed Oct 16, 2019 3:09 am
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

If after reboot I unmount hdd and do sudo mount /dev/sda1 /media/usb0/ then I am able to write to it with 36,1 MB/s Probably something is wrong in my fstab: PARTUUID=25d6e1ac-01 /boot vfat defaults 0 2 PARTUUID=25d6e1ac-02 / ext4 defaults,noatime 0 1 UUID=fb769947-7836-4897-b2fd-107a6718e413 /media/...
by zeitalex
Tue Oct 15, 2019 6:50 pm
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

If this hdd connected to notebook directly, it gives 42,1 MB/s:

Code: Select all

$ dd if=/dev/zero of=test1 bs=524288 count=2048
2048+0 Datensätze ein
2048+0 Datensätze aus
1073741824 Bytes (1,1 GB, 1,0 GiB) kopiert, 25,5065 s, 42,1 MB/s
even if I connect hdd directly to very old RPi1 it gives me 12.0MB/s
by zeitalex
Tue Oct 15, 2019 5:41 pm
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

In both cases it is the same disk and it is ext4. It is connected to RPi. In first case i am starting dd on RPi directly, and in second case i am starting dd on my notebook over NFS mount pointing to the same disk connected to RPi.
by zeitalex
Tue Oct 15, 2019 3:54 pm
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

Following I am getting on RPi (usb0 connected to RPi): pi@raspberrypi:~ $ dd if=/dev/zero of=/media/usb0/Tests/test bs=524288 count=2048 2048+0 records in 2048+0 records out 1073741824 bytes (1,1 GB, 1,0 GiB) copied, 296,676 s, 3,6 MB/s and this I am getting on my notebook on the same folder connect...
by zeitalex
Mon Oct 14, 2019 10:22 am
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

buffered reads is a red herring dd if=/dev/zero of=test bs=524288 count=2048 will write 1GB to your device in a file called test change test to point to your mounted drive and give the results rsync will give various results depending on what it there already etc.. I am getting 3,7 MB/s: pi@raspber...
by zeitalex
Mon Oct 14, 2019 7:51 am
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

Today I started hdparm -tT /dev/sda1 again and "Timing buffered disk reads" was 28 MB/sec. Obviously first time was another process that was writing to hdd at the same time and this was the reason why "Timing buffered disk reads" was 4.80 MB/sec. But still I have problem that /dev/sda1 is very slow ...
by zeitalex
Sun Oct 13, 2019 11:16 am
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Re: Copying to USB HDD is very slow

sudo hdparm -tT /dev/sda1 /dev/sda1: Timing cached reads: 1282 MB in 2.00 seconds = 640.70 MB/sec Timing buffered disk reads: 16 MB in 3.33 seconds = 4.80 MB/sec If i am on Pi and doing rsync locally (from one local usb drive to "problematic" local usb drive), it copies with 1MB/s, but if i am on m...
by zeitalex
Sun Oct 13, 2019 6:52 am
Forum: Troubleshooting
Topic: Copying to USB HDD is very slow
Replies: 13
Views: 966

Copying to USB HDD is very slow

Seagate 8TB Backup Plus USB3 Hdd (formated with ext4) is very slow on my RPi3. If i download via ftp for example it is about 300KB/s while other usb drives and SD Card gives about 7MB/s. Local copying to it is also very slow. The strange thing is that if I copy to this drive connected to RPi from my...
by zeitalex
Mon Jul 03, 2017 1:30 pm
Forum: Troubleshooting
Topic: Libreelec with SCART adapter does not work on analog TV
Replies: 1
Views: 346

Libreelec with SCART adapter does not work on analog TV

Hi all, first of all I have tried it on my old analog tv via SCART adapter in Germany, and it worked fine. I sent my RPi3 to Uzbekistan but there they tried on 2 analog TVs and it did not work. On boot TV just shows LibreElec logo and then just black screen. Do TVs in Usbekistan have another analog ...
by zeitalex
Fri Mar 25, 2016 9:54 pm
Forum: Advanced users
Topic: PC Copy button
Replies: 2
Views: 630

Re: PC Copy button

Thanks a lot for your answer. If I start scanning or printing from RPi it works. But if I press copy button on printer then printer's powerbutton flashing but nothing happens. In my case I can only use command line. There is no monitor connected to Pi. As a work around I was thinking about creating ...
by zeitalex
Fri Mar 25, 2016 9:35 pm
Forum: Advanced users
Topic: PC Copy button
Replies: 2
Views: 630

PC Copy button

Hi all, multifunctional HP Deskjet f4224 has ability to copy documents only if connected to windows PC. Is it possible to make "pc copy" to work with raspbian/raspberry pi? May be at least it is possible to start a shell script on Pi by pressing the "Copy" button on Printer? Any help would be highly...
by zeitalex
Sun Mar 06, 2016 7:16 am
Forum: General discussion
Topic: Raspberry Pi 3 and Motorola Lapdock
Replies: 8
Views: 6986

Re: Raspberry Pi 3 and Motorola Lapdock

Hi,
How did you manage audio? Just got my RPi3 yesterday, plugged in into Lapdock, and no audio. I have uncommented hdmi_drive=2 in config.txt and did modprobe snd_bcm2835, but still no audio. Audio works well with RPi2.
Thanks a lot in advance
Alex
by zeitalex
Sun Mar 06, 2016 7:07 am
Forum: Troubleshooting
Topic: RPi3 no sound on Motorola Atrix Lapdock
Replies: 0
Views: 213

RPi3 no sound on Motorola Atrix Lapdock

Hi all,
Yesterday I have got my RPi3. I have problem getting sound on Motorola Atrix Lapdock. I have uncommented hdmi_drive=2 in config.txt and did modprobe snd_bcm2835, but still no audio.
any help would be highly appreciated
Alex

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