franek4always
Posts: 2
Joined: Wed May 08, 2013 7:10 am

USB - UAS over BOT ?

Fri Nov 13, 2015 12:47 pm

Are there any performance benefits attaching external hard disk in USB 3 UAS box over USB 2 BOT ?

drgeoff
Posts: 8611
Joined: Wed Jan 25, 2012 6:39 pm

Re: USB - UAS over BOT ?

Fri Nov 13, 2015 2:13 pm

If you mean is it better to use USB3 than USB2 then there is no gain with a RPi as its USB ports are USB2.

franek4always
Posts: 2
Joined: Wed May 08, 2013 7:10 am

Re: USB - UAS over BOT ?

Fri Nov 13, 2015 5:37 pm

drgeoff wrote:If you mean is it better to use USB3 than USB2 then there is no gain with a RPi as its USB ports are USB2.
drgeoff, I know it, the issue regards external hdd enclosure with UASP protocol. There are several opinions in the Internet that claims this solution is also benefit when using with USB v2

DirkS
Posts: 9221
Joined: Tue Jun 19, 2012 9:46 pm
Location: Essex, UK

Re: Wish: "USB-Attached-SCSI"/UASP in the next version of Raspberry Pi

Sat Sep 08, 2018 5:43 am

esbeeb wrote:
Sat Sep 08, 2018 4:31 am
Dear Raspberry Pi Foundation: please oh please include
You should open an issue at https://github.com/raspberrypi/linux or https://github.com/raspberrypi/firmware

LTolledo
Posts: 727
Joined: Sat Mar 17, 2018 7:29 am

Re: USB - UAS over BOT ?

Sat Sep 08, 2018 7:50 am

Tried OMV either on RPi and 3 other SBCs. Troublesome and grew tired of it. Abandoned it and went back to one I liked best....
"Don't come to me with 'issues' for I don't know how to deal with those
Come to me with 'problems' and I'll help you find solutions"

Some people be like:
"Help me! Am drowning! But dont you dare touch me nor come near me!"

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ab1jx
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Location: Heath, MA USA
Contact: Website

Re: USB - UAS over BOT ?

Sun Sep 30, 2018 11:58 pm

But the UASP part is what i was looking to find out about. I don't get any hits when I search for it in the raspberrypi.org forums. I'm looking at buying a StarTech S3510BMU33 adapter with UASP or for $5 less a S3510SMU33 without it. I think it will revert to conventional mode if UASP isn't supported.

According to https://blog.startech.com/post/all-you- ... bout-uasp/ it's been supported in Linux kernels since 2.6.3. Unless I hear otherwise in the next 24 hours I'll probably buy one. From froogle.com it looks like a good street price is about $38. I have a 1 TB 3.5 inch with a couple years life left, but I should be able to replace that with 5 or 14 TB.

https://www.newegg.com/Product/Product. ... -_-Product

CanadaPi
Posts: 2
Joined: Sat Oct 20, 2018 9:16 am

Re: USB - UAS over BOT ?

Sat Oct 20, 2018 9:20 am

Did you order this and find out if it works?
I've got a 10TB drive to connect to the Pi. Wouldn't work in my old USB2 enclosures. Hadn't realised I needed UASP support.
Will I be able to use this drive with the Pi and a USB3 UASP enclosure? Obviously I understand that data throughput would be at the USB2 speeds...

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ab1jx
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Location: Heath, MA USA
Contact: Website

Re: USB - UAS over BOT ?

Sat Oct 20, 2018 2:25 pm

Oh, sorry, yes it works. Except there's a 500 GB OpenBSD partition on there I want to get stuff out of, so I'm not sure I've hooked it to a Pi since I haven't gotten UFS (file system) to work, even though I built the kernel module for it. Actually yes I did, I had it plugged through a USB 2 hub, using gparted to delete partitions I don't care about anymore to free space. I've also had it hooked to an i386 laptop with OpenBSD to recover files. And I don't know about the UAS https://en.wikipedia.org/wiki/USB_Attached_SCSI I was just trying to get it to work at all. I also have a Rock64 which has USB 3, and a USB 3 hub for it.

The alarming thing about this StarTech case is that the drive runs hot, at least if it's a 7200 RPM. Leaving the cover off the case or mounting a fan in the cover is probably the answer. The case isn't tall enough to fit even a 40 mm fan in there, it just has a few ventilation holes on one end.

OpenBSD was also giving me some ioctl error when I tried to make a new partition and a couple other things, but gparted doesn't speak UFS at all, there was no disklabel, I didn't take it too seriously. The disklabel I saw was from the disk before I deleted the extra partitions. I had consolidated a few partitions into a bigger one but short of building my own disklabel from scratch and having all the numbers perfect I couldn't access it from OpenBSD. I copied stuff off, but onto a 1 TB drive in the laptop that was already low on space.

CanadaPi
Posts: 2
Joined: Sat Oct 20, 2018 9:16 am

Re: USB - UAS over BOT ?

Sat Oct 20, 2018 4:52 pm

ab1jx wrote:
Sat Oct 20, 2018 2:25 pm
Oh, sorry, yes it works.
Thanks for the update!

I've ordered a UGREEN enclosure that us UASP enabled and that supports 10TB drives, so we'll see how things work out when it arrives early next week.

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