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    Free space on SSD


    Hi all, I just bought a brand new Samsung 840 Pro 256 Gb SSD drive, and I've read here and there that you must have at least 10% free to have your SSD work like a charm, if you fill it up too much, performances will degrade.

    So, I wanted to know if it's a good idea to actually format the drive to, let say 220Gb instead of using all the space and let the remaining 36Gb unformatted so the drive cannot be filled up and cannot degrade over time, will it work or the drive will degrade over time when it reaches near 220Gb?

    Thanks
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    The first thing I would suggest you do is make a note of the dates on anything you read. Any perceived "problem" from more than say 18 months ago is likely to have already been addressed in a modern drive.

    Also beware of "problems" which only affect particular makes and models being generalised to being a problem with all SSD's.

    The other thing to look at is your usage patterns. Are you going to be writing (and deleting) 10Gb per day when you've only got 20Gb free?

    The 10% free could also apply to older spinning disks as well (for different reasons). With low free space, files are more likely to be created fragmented to begin with, and defrag has to work a lot harder to clean things up.

    > let say 220Gb instead of using all the space and let the remaining 36Gb unformatted
    Rather than allow the file system to use 100% of 220GB, I would suggest you format the whole lot and set a quota of 80%. The file system will benefit from the extra wiggle room, and you have the option of temporarily (or permanently) altering the quota if you need to later on.
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    Almost all solid state drives will degrade in performance somewhat as they are filled with more data, but as long as you're using a modern drive and operating system that both support trim, then write amplification, which is the primary cause of degraded performance when the disk gets full, will essentially be a non-issue. There is no reason to leave any of the drive unformatted.
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