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:...
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  • 351
19 votes

How can I put RaspberryPi to Shut down and wake up later?

You could check out the Witty Pi from UUGear as a simple extension to the Raspi. Will do proper startup and shutdown of system, includes real-time clock.
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  • 191
17 votes
Accepted

NTFS USB HDD Read-Only - How to enable write permissions

Set ownership when you mount the drive. For example if your drive that you want to mount is /dev/sda1: sudo mount -t ntfs-3g -o uid=pi,gid=pi /dev/sda1 /media/USBDRIVE/ or if later you want to ...
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15 votes
Accepted

Can the Raspberry Pi power this 2.5" drive without a USB hub?

These type of enclosed hard drives conform to the USB specification 2.0 specification, even though it's USB 3.0 it must be able to fall-back. USB 3.0 provides lots more power, but since it falls back ...
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  • 17.1k
14 votes

Raspberry Pi WiFi to Ethernet Bridge for a server?

This is a common problem with tons of documentation on the web. A very informative discussion I've found on (1). Be aware that this problem only belongs to a wifi client connection that you want to ...
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  • 39.6k
11 votes

Can Rpi4B power external / portable USB HDD / SSD?

not able to power ... from a Raspberry pi 3 Here's why: Pi 3 was designed with USB 2.0 specs, including the 0.5 amp limit. Most hard drives require more current than that. Raspberry Pi 4 has USB 3.0,...
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  • 1,574
9 votes
Accepted

Correctly partition 4TB drive with enclosure using Pi

There are a few things that you need to do to get this to work. First, after physically connecting the drive, run dmesg to see the name of the node in /dev. You should find something like this: [ ...
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  • 241
9 votes
Accepted

How to change permissions on external hard-drive connected to Raspberry?

You are probably not doing anything wrong. It seems to me that the real issue is that the instructions, as written, don't work generically. The point at which you are apparently stuck is the chown ...
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  • 951
8 votes
Accepted

Boot from USB hard disk?

Now, nearly five years later after author originally asked this question, Raspberry Pi officially supports booting from USB mass storage device. However, this is supported only for Raspberry Pi 3. ...
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8 votes

Can I attach a SATA controller?

If you dare, you can implement PCI-E x1 with six pins: SM_SCL, SM_SDA (go to I2C bus as SMBus signal), PCIE_IRQ (open drain, shared by all cards), PCIE_CLK (Derive into differential signal with ...
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  • 1,041
8 votes
Accepted

What are pin headers and what are they used for

The 40 pin expansion header provides power and ground rails as well as 28 GPIOs (general purpose inputs outputs). The GPIOs are controllable IO lines and as the name suggests may be individually ...
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  • 66.5k
8 votes
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Will RPI3 power down an external USB hard disk if not used for a certain amount of time?

Yes. Here's what I use: hdparm -B 127 /dev/sda hdparm -S 242 /dev/sda From the command line as the pi user you would have to add sudo there. The first line enables spin down. The second one sets ...
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  • 55.8k
7 votes

Can the Raspberry Pi power this 2.5" drive without a USB hub?

From my personal experience, WD Blue HDD (WD10JPVT/WD10JPVX with 0.55A average current) might work more or less reliably (== require about 1 reboot / month) connected directly to RPi without any ...
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  • 11.5k
6 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 ...
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  • 171
6 votes

Rpi can't see external hard drive

Based on your dmesg output, it looks like the hard drive isn't getting enough power. It's does the connection phase, and then starts the spin up process. Since this is the most energy intensive task,...
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  • 11.7k
6 votes
Accepted

Is it safe to power my external hard drive with a Raspberry Pi 3 B+ USB port?

You SHOULD be able to power a USB HDD from the Pi3B+ as the USB ports can supply 1.2A. HOWEVER, I and others have found that this is often unreliable - this seems to be due to transient voltage drop ...
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  • 53.5k
5 votes

Boot from USB hard disk?

Indeed, if you can live with just the SD MS-DOS partition (/boot) where the kernel reside, you can have /root and everything else on an external device. USB memory card or a physical hard drive are ...
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  • 1,769
5 votes

How can I connect an internal 3.5'' SATA HDD to Raspberry Pi

Well the SATA physical link is built on two differential serial links, i.e. you would need 4 GPIOs. So there is no problem there. I do not see any particular problem in emulating the commands and ...
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  • 66.5k
5 votes
Accepted

How to connect SATA drives without USB

Worth reviewing this answer on ee.se https://electronics.stackexchange.com/questions/118537/interfacing-with-sata-in-embedded-systems In short, not simple. In the most reasonable scenario, ...
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  • 2,895
5 votes

Attach SAS Drives

Before the Compute Module 4 came out, the answer was no; however, I'm currently testing an LSI SAS3082E-R SAS controller with the Compute Module 4 + IO Board, and I'm hopeful it will work. I'm ...
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  • 1,506
5 votes
Accepted

Powered USB3 Hub vs USB3 Y Power Cable

I doubt it would work, according to this page: USB - port power limits the Raspberry Pi USB ports are designed to handle 100mA each so the advice is to always use an external hub with its own power ...
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5 votes
Accepted

Permission denied to access `/media/pi` folder

This happens because you have mount helpers which mount the storage devices with the identity of the user holding the current session on your machine. If you have a GUI and log in as pi, that's the ...
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4 votes

Can I attach a SATA controller?

Raspberry Pi is limited in bandwidth due to the USB ports and Ethernet sharing a single 480mbps USB2 host port. See: http://www.mikronauts.com/raspberry-pi/raspberry-pi-2-usb-hard-drive-and-adapter-...
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4 votes

How can I put RaspberryPi to Shut down and wake up later?

The Raspberry Pi doesn't have the hardware needed to shut-down/start-up like a regular desktop PC. The simplest, and possibly most reliable, solution would be to use a timer switch to switch the ...
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  • 66.5k
4 votes

Can the Raspberry Pi power this 2.5" drive without a USB hub?

If your HDD does not have its own power source (excluding USB), it will generate a problem. For a RPi B, all power that will be drawn by USB port will pass through the main regulator. It is a linear ...
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  • 436
4 votes

Raspberry Pi 2 + WD My Passport (external 2.5 USB 3.0)

The image you are describing is the Pi's way of telling you that it is not getting the required voltage. You should be powering the HDD from an external powered hub, not from the Pi directly. More ...
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4 votes

External SSD or External HDD more suitable for Raspberry Pi 2 Model B?

If it is a local media center that will not stream multiple HD streams at the same time from harddrive, any modern hard drive will have enough speed for media center applications, so if cost is your ...
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4 votes

NTFS USB HDD Read-Only - How to enable write permissions

I just wanted to share my experience on using the current version of ntfs-3g installed with apt-get install ntfs-3g (version 1:2014.2.15AR.2-1+deb8u2). I was getting "Input/output error" using that ...
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4 votes

Max safe current and power requirements for Raspberry Pi 2 Model B?

The short answer is to use a powered USB hub to connect the drives to the Pi. TL;DR The Pi needs a 5 volt power supply. The Pi will only draw as much current as it needs so something between 1 and ...
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4 votes
Accepted

Keyboard and mouse stops working after connecting usb hard drive

Just like most other issues with the Raspberry Pi, this is most likely a power issue. Make sure you are using a short and thick USB cable. And a supply that provides at least 5V at 1A, but I highly ...
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  • 6,185

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