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I'm just curious if it is possible do it. I have a spare 4gb sd card.

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Previous answer: askubuntu.com/questions/168874/… –  iamwpj May 31 '13 at 13:53
    
Possible duplicate of Can i Install Ubuntu on my SDCARD and improve performance? –  Alvar May 31 '13 at 13:56
    
This is not really a dupe as we are asked here for any way which would also include measures other than install (even though the answer may be the same). –  Takkat May 31 '13 at 14:23

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up vote 2 down vote accepted

Because the bandwith of the SD card interface is quite low compared to even a regular HDD (around 20Mb/s compared to 70-100Mb/s) it will be much slower. Where you can gain speed is by adding as much RAM as possible, and using an SSD instead of the HDD.

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What SD-cards are you refering to? If I would do this I would pick an Ultra fast at 100MB/s read and 90MB/s write. –  Alvar May 31 '13 at 14:10
    
Like this one, sandisk.com/products/memory-cards/sd/… –  Alvar May 31 '13 at 14:13
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The r/w speed of your SD card will always depend on your card reader interface. I've just gave you an example for a regular one, but as you can see even an ultra fast card it is just around a slow HDD. A newer SATA HDD will have something like this: Timing cached reads: 23910 MB in 2.00 seconds = 11973.87 MB/sec Timing buffered disk reads: 360 MB in 3.05 seconds = 118.09 MB/sec –  Frantique May 31 '13 at 14:13
    
I just looked up my HDD and it read/writes at 130MB/s, so never mind. –  Alvar May 31 '13 at 14:17
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130MB/s is quite good but keep in mind that the further the read heads move, the lower the speed becomes. It is possible for hdd to lose up to 40% of maximum speed (depending on make and model). Also, another alternative to SSD is a fast USB3 stick. –  hmayag May 31 '13 at 14:23

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