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Boot OS from flashdrive?


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#1 Mac29

Mac29

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Posted 25 January 2016 - 11:25 AM

I'm reading a lot about running an OS off a flashdrive and needing fast speeds. I think I can run Windows flavors in a VM under something Linux like Mint. Do modern flashdrives use TRIM, like SSDs, to improve longevity? Any way you could run an OS off a flashdrive that uses a ramdisk so less writes?

Also, I think if I get a drive w/ at least 100 MB/s read and write I'll be alright. But some talk about needing fast 'sequential' something or other (writes?). Any guidance would be appreciated.


Thanks,

Mac



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#2 idleHands

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Posted 27 January 2016 - 02:45 PM

From my limited understanding, TRIM can't be used via usb at all.

 

Having tried a couple of live os loaded from usb flash sticks, mostly usb 3 standard and sticks rated (marketed) at c. 100MB/s to 120MB/s, once they have booted the os everything is loaded to ram and all changes are lost at power off. I don't know if this is done via a ramdisc, I would have a quick look at the disk info but have no os written to usb presently. So usb can be removed and no unnecessary flash usage. I have not used a persistent live os before so can't comment. 

 

I have ran VM's with the guests virtual disk on usb 3 stick, that was painfully slow.

 

For an easy starter Ubuntu can be launched from usb without writing to disk and always has plenty of support to get going. And as for longevity mine usually just end up lost I've never had a flash drive fail.


Edited by idleHands, 27 January 2016 - 02:52 PM.





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