Can Ubuntu Run Efficiently on an External SSD?

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Discussion Overview

The discussion revolves around the feasibility and performance of running Ubuntu from a portable SSD connected via USB on various computers, particularly older laptops and a Mac. Participants explore the implications of using external SSDs versus internal SSDs, considering factors such as speed, installation time, and hardware compatibility.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants inquire about the possibility of booting Ubuntu from a portable SSD and express concerns about potential performance issues.
  • Others suggest that performance may vary depending on the USB port type (e.g., USB 3.0 versus USB 2.0) and the specific hardware configuration of the laptop.
  • One participant mentions using an M.2 SSD with high read speeds and questions the viability of using it in an external enclosure for running simulations.
  • Another participant shares their experience with installing CentOS on a USB drive, noting that installation was slower than on a traditional spinning disk, but performance was comparable.
  • Some participants recommend using an internal SATA SSD for better performance, especially if the laptop supports it, while others express hesitation about modifying a Mac.
  • A participant raises the question of whether using different connection types (USB-C, Thunderbolt, USB 3.0) would significantly impact the speed of an external SSD.

Areas of Agreement / Disagreement

Participants express a mix of opinions regarding the performance of external SSDs versus internal SSDs, with no clear consensus on the best approach. Some agree that internal SSDs generally offer better performance, while others are open to the idea of using external SSDs depending on the specific setup.

Contextual Notes

Participants mention various hardware configurations and potential limitations, such as the need for BIOS updates on older machines and the compatibility of different SSD types with specific laptops.

Who May Find This Useful

This discussion may be useful for users considering running Ubuntu from an external SSD, particularly those with older laptops or Macs, and those weighing the benefits of internal versus external storage solutions.

member 428835
Hi PF!

Can I boot Ubuntu from a portable SSD on a computer, say a laptop? If I run ubuntu from a portable SSD plugged into a usb drive, will it run slow? We have this old computer in my lab, but it's Windows and runs Ubuntu from a VM, so super slow and awful memory. Or should I just buy another SSD, plug it into the motherboard, and go from there? What do you recommend?
 
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joshmccraney said:
Can I boot Ubuntu from a portable SSD on a computer, say a laptop?
Yes.
joshmccraney said:
If I run ubuntu from a portable SSD plugged into a usb drive, will it run slow?
Maybe. How slow is slow?
joshmccraney said:
Or should I just buy another SSD, plug it into the motherboard, and go from there?
That will work too.
 
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Vanadium 50 said:
Yes.

Maybe. How slow is slow?

That will work too.
How slow? I was thinking about using an M.2 SSD with 3400 megabytes/s. I was thinking of mounting to an external mount: M.2 NVME SSD enclosure adapter USB C 3.1 Gen 2 at 10 Gbps, 6 Gbps SATA PCIe. So this SSD mounted externally to this enclosure. I'd be running simulations that can take a few days. Does anything scream "no don't do it" to you?
 
I installed Centos on a USB 3 key. It took ~10x longer to install on it than on a USB 2 spinning disk. Running felt about the same as on the spinning disk. I eventually went with an internal SATA 3 SSD (a $10 bargain basement deal from Microcenter) which was faster than both and entirely acceptable.

My home area is on a remote server.
 
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joshmccraney said:
Can I boot Ubuntu from a portable SSD on a computer, say a laptop?
Probably; you may need to update the BIOS on an old machine.

joshmccraney said:
If I run ubuntu from a portable SSD plugged into a usb drive, will it run slow?
Yes, particularly if the laptop does not have a USB 3 port.

joshmccraney said:
Or should I just buy another SSD, plug it into the motherboard, and go from there? What do you recommend?
This. You will get much better performance from a bog-standard SATA internal SSD (which is all an old laptop is likely to support) than an external M2 device over USB, and the setup will also be cheaper and more convenient.

I've just realized you said plug it into the motherboard. Does this laptop have an M2 port on the mobo? It is not that old then, and an internally mounted M2 drive will blow anything external out of the water.

If it doesn't have an M2 mobo you will instead be replacing the existing spinner installed in the SATA drive bay.
 
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pbuk said:
Probably; you may need to update the BIOS on an old machine.Yes, particularly if the laptop does not have a USB 3 port.This. You will get much better performance from a bog-standard SATA internal SSD (which is all an old laptop is likely to support) than an external M2 device over USB, and the setup will also be cheaper and more convenient.

I've just realized you said plug it into the motherboard. Does this laptop have an M2 port on the mobo? It is not that old then, and an internally mounted M2 drive will blow anything external out of the water.

If it doesn't have an M2 mobo you will instead be replacing the existing spinner installed in the SATA drive bay.
The laptop is a mac, which I don't like tinkering with. I was going to add another SSD to the mobo of a desktop, but then I have to remote access. I think the better option might be to plug an external SSD into the mac and let it do its thing. Would the external SSD run substantially slower when going through a USB-c, thunderbolt, or USB3.0?
 
joshmccraney said:
Would the external SSD run substantially slower when going through a USB-c, thunderbolt, or USB3.0?
Maybe.
 

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