External USB HDD

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External USB HDD

Unread postby jkbkrk » Wed Oct 26, 2016 11:53 pm

Hello! I'm thinking about buying Odroid C2 but I have one question that hopefully someone will be able to answer :)

I'd like to extend C2's storage to something like 1-2 TB. The simples solution for me is to buy USB HDD but I'm aware of the fact that there might be problems with powering it. I was browsing the forum and I've found this two models that should work fine:

odroid wrote:- WD My PassPort Slim USB 3.0 1TB
- Seagate Backup Plus USB 3.0 1TB

http://forum.odroid.com/viewtopic.php?f=139&t=20421&p=135358#p135358

Can someone suggest me other external HDD drives that will work with C2?

Thank you!
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Re: External USB HDD

Unread postby odroid » Thu Oct 27, 2016 3:41 pm

Any well-know brand's USB 2.5inch HDD should work well if you use our official power supply.
Let us know which model you consider buying.
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Re: External USB HDD

Unread postby jkbkrk » Thu Oct 27, 2016 8:18 pm

Hi, thank you for the response.

I'm thinking about:
- Toshiba Canvio Basics 1TB USB 3.0
- Seagate Expansion Portable 1TB USB 3.0
- Seagate Backup Plus Slim 1TB USB 3.0

I can buy Toshiba slightly cheaper than the other two and also on the Toshiba's official page (http://www.toshiba.eu/hard-drives/portable/canvio-basics/hdtb310ek3aa/) I found:
Toshiba wrote:Power - USB bus power (max. 900mA)

Does this mean it should work fine with C2?

One more option which I was considering is buying 2.5" HDD alone and some kind of external USB case for that. I suppose it is more risky.

Thanks.
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Re: External USB HDD

Unread postby odroid » Sun Oct 30, 2016 12:23 pm

If its max(peak) power is 900mA, it should work with C2.
Consider using our power supply for reliable 5V/2A power source.
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Re: External USB HDD

Unread postby jkbkrk » Thu Nov 03, 2016 5:09 pm

Hi, I bought Toshiba Canvio Basics 1TB USB 3.0 and it works fine. Thanks.
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Re: External USB HDD

Unread postby odroid » Thu Nov 03, 2016 6:04 pm

Thank you for the confirmation.

This topic is "STICKY" now.
I hope other users will share their experience on this thread. :)
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Re: External USB HDD

Unread postby fvolk » Sat Nov 19, 2016 2:53 am

I run a "Seagate Backup Plus Slim 2 TB" as external mass storage with a 2A power supply. 2 TB for ~95 EUR is quite ok.

I set it to auto-standby after 30min without any access:
hdparm -S 241 /dev/sda
...so when a job is done and I'm also not working with it (e.g. night) it spins-down into standby and I don't have to spend any thoughts on it.

Only downside is the slow USB 2.0 access, but maybe the next generation C3 will improve this...
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Re: External USB HDD

Unread postby Adi_Ro » Fri Dec 23, 2016 6:37 pm

Hello all.

I faced almost the same problem (sometime my HDD/USB stick it was ok and another time not ) and i identified the problem with the oscilloscope. On the bottom side of PCB i measured Vcc on the USB connector and i found some ripples (around 200mV-300mV). And yes i do not use original power supplies (it's just a simple 5V/2A power supply).
The solution for minimizing those ripples it was to mount 2 capacitor (on bottom side of PCB, right on USB connector pins) for each USB connector (one smd ceramic 100nF and one smd tantal 10uF).
Now it's ok.

Good luck!
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Re: External USB HDD

Unread postby MrGlasspoole » Sat Jan 07, 2017 3:25 am

In the past i had bad experience with some USB enclosures.
I always use one of these:
http://www.logilink.eu/Products_LogiLin ... DD_OTB.htm
http://www.logilink.eu/Products_LogiLin ... AU0009.htm
and by a WD hard drive.

This adapters are good for data backups, work with CD-ROMs and they are so small that it's easy to carry theme everywhere.
The important thing for me is that i can feed extra power to the HDD so i don't suck power from the USB port.

The LogiLink USB 2 Adapter works in Android, LibreELEC and Volumio.
The other one i just got is this one:
https://www.amazon.de/CSL-Adapter-Konve ... 01K22TZ3I/
and it works in Android, LibreELEC and Volumio.
You only need the wall wart if you connect a 3.5" (12 volt) drive to it.
I did not test where the power comes from if you connect a 2.5" drive and connect the wall wart because i slice the cable anyway and cut the 5 volt line.
I bought it because maybe the next Odroid-C has USB 3.0 and there is UASP (USB Attached SCSI Protocol) support.

Adi_Ro wrote:On the bottom side of PCB i measured Vcc on the USB connector and i found some ripples (around 200mV-300mV). And yes i do not use original power supplies (it's just a simple 5V/2A power supply).

Yes there are too many power supplies that are not good.
I bought a P.SUP.SMP5V2A5:
https://www.amazon.de/HQ-Schaltnetzteil ... B0017ZIVIA
and even without anything connected to the RPi3 the Pi always shows the undervoltage warning.

After i bought a Xtar Wall Adaptor 2.1A (model: FJ-SW1260502100UE) everything was ok.
Here are power supplies/charger tests: http://lygte-info.dk/info/ChargerIndex%20UK.html
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Re: External USB HDD

Unread postby jenja_c2 » Sun Jan 08, 2017 9:35 pm

Hi,
my experience if anyone is intererested:
I am now using two Toshiba 2TB Canvio USB3.0 Portable Hard Drives - they are USB3.0/2.0 compatible.
I attached them to two USB2.0 host ports, as I planned to power the C2 via USB OTG only.
The power was meant to come from the wall socket with two built-in USB chargers, both 5V/2A. That did not fly at first, as apparently, the HDDs were peaking over 900mA, and the C2 could not initialize them (though, the board was doing fine, measures on GPIO pins and directly the chargers checked out OK - I guess the OTG protects from over 500mA supply).
So, I had to solder in alternative power input via J8 pins, and it did a trick! Now, the board uses both power supplies, whilst the drives look happy, syncing RAID1.
Code: Select all
Quick perf test:
# hdparm -t /dev/sdb
/dev/sdb:
 Timing buffered disk reads: 110 MB in  3.00 seconds =  36.65 MB/sec
# hdparm -t /dev/sdbc
/dev/sdc:
 Timing buffered disk reads: 102 MB in  3.05 seconds =  33.45 MB/sec

The spindown sometimes bites a little bit, and I don't know how disable it, as yet.
Next steps will be to play with ZFS and build something like an encrypted NAS with some redundancy.

EDIT: Nah... it does not seem to be stable to run two HDD, specifically, doing read/writes to each others - tried various configurations of raid to see one drive out of two constantly gets disconnected, and the dev tree rebuilt - it may suggets power or kernel issues - so I gave up and now trying just a single hdd config
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Re: External USB HDD

Unread postby mush-room » Mon Feb 27, 2017 8:22 am

odroid wrote:If its max(peak) power is 900mA, it should work with C2.
Consider using our power supply for reliable 5V/2A power source.


So, there is a build in overcurrent protection, limiting the USB-ports to 5V/900mA each?
Think, 900mA is sufficient for every SSD, but for older HDD the good old "Y-cable" still makes sense?

Regards and thank You for the nice little computer! :)
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Re: External USB HDD

Unread postby odroid » Mon Feb 27, 2017 9:50 am

Actual current limiter is set at 1.7Amp per two USB ports in the latest PCB.
http://odroid.com/dokuwiki/doku.php?id= ... on_history
But C2 CPU/RAM/Ethernet needs 0.5~1Amp at full load and external USB storage must draw less than 1Amp for the system stability.
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Re: External USB HDD

Unread postby mush-room » Tue Feb 28, 2017 9:43 am

Thanks!
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Re: External USB HDD

Unread postby endera » Mon Aug 21, 2017 6:50 am

4tb external usb hdd suportted??
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Re: External USB HDD

Unread postby odroid » Tue Aug 22, 2017 4:11 am

We tested Seagate external 5TB 2.5inch HDD and it worked with our official 5V/2A PSU once we removed the J1 jumper on the C2 board.
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Re: External USB HDD

Unread postby thatchunkylad1989 » Mon Dec 25, 2017 8:33 am

I'm also thinking of getting an external HDD, I have an old 1TB lying around and can buy an external enclosure for around £13 that is 3.5" but the beauty of it, it comes with it's own power supply and can do USB3/USB2.
ATM I'm using my C2 connected via network shares so I have more storage, the cost of eMMC's IMO is too expensive; I can buy a decent external HDD for around £60 - the higher GB eMMC's could be well over that, if they're in stock.

Just my two cents. ;)
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