25
votes
Transmission: permission denied on USB disk
After lots of reading and frustration. First of all, make sure the normal user has read and write acces to the USB drive. The correct 'non-root' fix for having write acces to the USB drive is:
Step 1:...
- 351
9
votes
What's the maximum SD card size that the Raspberry Pi will accept? Do larger cards give slower performance?
This will not really happen on the Pi unless one puts loads of stuff on there.
SD cards come in five maximum speed classes:
Class 1: maximum speed of minimum 1 MB/s
Class 2: maximum speed of ...
- 283
8
votes
How to tell how much memory is left on the SD card?
As others have mentioned, df -h will give you overview. Also useful:
du -csh (show total disk space used in current tree)
du -csh /path (show total space used in specified tree)
du -csh (show space ...
- 3,978
8
votes
How to make a high powered USB hard drive work with the Pi?
The Pi 2 should be able to run that HDD directly. However, by default the power to USB is limited to 600 mA, which is not enough (I've had the same issue with an external drive).
To make 1.2 A ...
- 57.9k
7
votes
Transmission: permission denied on USB disk
None of the answers here worked for me, so I am writing a new one referencing https://pimylifeup.com/raspberry-pi-torrentbox/ which worked great for me and allowed me to run transmission as pi user to ...
- 181
6
votes
Accepted
How to make a high powered USB hard drive work with the Pi?
Use an USB hub that has a power supply?
You should check how much power your HDD needs and how much the USB hub can deliver.
Maybe this question can help: link
- 98
6
votes
What's the maximum SD card size that the Raspberry Pi will accept? Do larger cards give slower performance?
I'm using a SanDisk Extreme Class 10 with UHS-U3 on my RPi3, I have the microSD driver overclocked and I hit 33.80MB/s while reading/writing.
Speed don't decrease with capacity, just ensure to use a ...
- 921
6
votes
Problem when saving many files in Raspberry Pi
Linux kernel is caching disk operations. That means data is written not in real time, but when it is "time to do it".
There could be two reasons of behaviour you described:
1. Your SD card (or disk) ...
- 401
6
votes
Accepted
How to install FreeNAS
I think it's unlikely that a Pi would work well, if at all, with FreeNAS.
Note the recommendation on their download page:
The new recommended boot device size is 8GB. FreeNAS 11 requires 8GB of ...
- 6,248
5
votes
Is there a way to compress a backup of the RPi because the backup has empty space?
https://www.raspberrypi.org/documentation/linux/filesystem/backup.md explains backup and restoration.
You don't indicate what OS you are using but it is simple on any 'NIX system.
I use the following ...
- 57.3k
5
votes
Is there a way to compress a backup of the RPi because the backup has empty space?
Already answered here dd-on-entire-disk-but-do-not-want-empty-portion
Assuming you want to save /dev/sdXN to /tgtfs/image.raw and you are root:
mkdir /srcfs && mount /dev/sdXN /srcfs
Use ...
- 2,635
5
votes
Issue with multi-user NAS setup
This seems to be a classical unix rights problem. Let's have a look on it. To avoid confusion I set user of /media/NAS to root and then check where is the problem:
pi@raspberry ~$ sudo chown root /...
- 41.5k
5
votes
Accepted
What is Wolfram engine and can I delete it?
Wolfram is the programming language of mathematica. Don't just delete the files. This may confuse and break your installation system. If you don't need wolfram just deinstall it with:
rpi ~$ sudo apt ...
- 41.5k
4
votes
Online Storage that I can mount on my mac
If you install netatalk on the Pi you can use it from OS X.
You can connect using open afp://raspberrypi.local on the Mac. It is also possible to connect from the sidebar in Finder although I find ...
- 57.3k
4
votes
Accepted
Online Storage that I can mount on my mac
There are many ways you could set this up. You could use a whole host of software to mount the RPi's storage as an ftp or sftp drive, you could use OwnCloud, btsync, or a zillion other things that ...
- 11.9k
4
votes
Will this MicroSD card work with my Raspberry Pi 3?
Yes it will work. The Pi does not support the protocols (or have the hardware) required to implement the higher speeds such as UHS, but will operate.
Any Class 4, 6 or 10 card will work - the only ...
- 57.3k
4
votes
Accepted
How to use external flash drive as raspberry pi 3 root storage?
You can put your filesystem on an external drive, there are instructions to use an external drive to boot your Pi. See https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md
...
- 57.3k
3
votes
Performance with an encrypted disk
So I tried that out and it works pretty nicely so far (except for some problems with the 4.1.18 kernel). Using cipher aes-xts-plain64 the speed is around 3MB/s for both reading and writing.
- 181
3
votes
Accepted
Ubuntu Mate not using all its storage
From the Ubuntu Mate Raspberry Pi page
to re-size the file system:
sudo fdisk /dev/mmcblk0
then delete the second partition and recreate it by selecting the following menu options:
- d
- 2
- n
...
- 34.4k
3
votes
Will this MicroSD card work with my Raspberry Pi 3?
You can check if your SDCard has been tested here http://elinux.org/RPi_SD_cards and see the results. Probably it will work without problems. Also you can add your test if there isn't available. You ...
- 1,251
3
votes
Accepted
Bluetooth Audio to Raspberry Pi Zero W as USB Mass Storage
You can build such a thing with a Pi. However, the problem would be how the head unit accesses the MP3 files, and the fact that you are changing it out from under it. Most programs (like the one the ...
- 1,120
3
votes
Accepted
Root directory using all space?
The first line of df isn't saying the root directory is using all that space, that's the root mount point, containing every directory which isn't covered by one of the other mount points.
I suspect ...
- 341
3
votes
Accepted
How to let Raspberry 4 B stop spinning the external hard disk when there is no write or read request?
The behavior you describe can apparently be achieved through installation and configuration of the hdparm utility (ref).
You might check the Arch Linux repo for this package, or you might try ...
- 20.3k
3
votes
Can I use a USB drive instead of a micro sd card?
Since you have a Raspberry Pi 4 it is possible to get it to boot from USB.
The process to switch from SD card boot to USB boot is demanding that you FIRST boot from a SD card.
So YES you need a SD ...
- 2,635
3
votes
How safe is it to connect a Seagate 2TB Expansion Drive to Raspberry Pi 4B?
To answer your questions sequentially:
If you are using a portable external hard drive from a reputed manufacturer, the enclosure should have vibration pads inside to protect the drive from shocks ...
3
votes
How safe is it to connect a Seagate 2TB Expansion Drive to Raspberry Pi 4B?
To add to Shivang's answer:
I've used a "spinning disk" USB drive powered from one of the USB3 ports on my RPi 4B for over a year now, and on a 3B for years before that. It runs 24x7, and I'...
- 20.3k
3
votes
Accepted
How can I figure out why two closely related Raspberry Pi OS image files vary substantially in size despite having nearly identical folder sizes?
I would be surprised if modifying a couple of text files confused the compression algorithm to the point it produced an extra 300MB of output. So I would start by comparing the sizes of uncompressed ...
- 27.4k
3
votes
What are the expected write speed for external storage connected to USB 3 (blue) on Raspberry Pi 4 B
I'm also using JMicron JMS567 SATA 6Gb/s in Bulk Only Transport protocol and I'm getting similar write speed:
Write speed test:
sync; dd if=/dev/zero of=./test.tmp bs=1M count=1024
> 1073741824 ...
- 143
3
votes
Accepted
How is Raspberry Pi OS bootable on all boards?
There are several approaches to this problem (which are not Pi specific actually).
One is "fat binaries" where a binary includes code segments for multiple cpus, and the start up execution ...
- 946
3
votes
Accepted
SD card full, how to clear space?
With the following commands you get a list of disk usage summaries for files and directories in the root directory /, sorted by size.
cd /
sudo du -skx *|sort -n
If necessary repeat the command in ...
- 231
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