That's why you are able to run them from a flash drive to begin with.
Most installations of Linux are small enough that don't take up enough space on a HDD to make any difference. An internal HDD is going to be faster (on average) than a USB flash drive. Firstly - as mentioned earlier - is the difference in speed. I, personally, don't see the logic in loading a long-term machine from USB, though. I use a small flash drive with PartedMagic installed all the time for that purpose and it works wonderfully provided the hardware can support the OS. If you are considering using the USB to run Linux from a Desktop, then the chances are that it will work relatively well, but why limit yourself to the speeds of the USB drive instead of capitalizing on the speed of the internal HDD or SDD (as the case may apply)? If, however, you are planning on running a Live version from USB - such as PartedMagic - from a USB to use as an IT tool for maintenance, network installs (using Clonezilla), or any number of diagnostic tools, then nothing beats the versatility of a USB flash drive with Linux installed. In my opinion, it all depends on what you are intending to use your USB installed Linux OS for. The USB may loose a block or two before the entire SSD fails. In this scenario, the USB is over 10 times more reliable on each logic gate but would not benefit from the wear leveling systems of SSD. This means you can have a MLC SSD rating of 8k cycles and a SLC USB device with a rating 100k cycles. Both USB and SSD devices can use any of those types of NAND, although SLC is more commonly found on SSD devices, they also can be found with MLC NAND just as USB devices can be equipped with SLC. Any difference between cycle ratings is really just the difference between SLC, MLC, and TLC NAND. I suppose my point about treating it as an SSD is to say that the more you delete/write to it, the faster it will fail.Īs for being rater for more or less delete/write operations on one over the other, they both use the same NAND logic gates. Of course, the other side of the coin is that while a USB drive may loose a block and experience reduced capacity, SSDs with leveling systems tend to fail all at once. In a USB drive there is no mechanism for this and you can loose blocks faster.
This makes sure the SSD does not try to delete/write to the one location more than any other. SSD has 'leveling' software to ensure that data is written to the drive in an even manner.
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