![]() ![]() The tool now appears in your Applications menu under System. We’re going to use an easy GUI tool called gparted - first install it: Just so that’s clear.īe strong, you are an internet hero. Re-formatting your SD is going to remove all the data on there. If you’re going to reformat a device, do it with care - if you don’t pay attention you could theoretically format your Chromebook internal disk, which I don’t recommend. You can check this by looking for /dev/sda1 - your Chromebook’s internal disk - in your mount output. Therefore ext4 is cool as shit, therefore that’s what we’re going to use. Reformat as ext4Ĭhromebook and Android use ext4 as their filesystem. It looks like my SD card with VFAT gives about 16.67 MB/s. Timing buffered disk reads: 50 MB in 3.02 seconds = 16.54 MB/sec Timing buffered disk reads: 50 MB in 3.02 seconds = 16.56 MB/sec Timing buffered disk reads: 54 MB in 3.02 seconds = 16.89 MB/sec We measure more than one data point because we are good scientists: You’ll remember from the previous post that on Chromebook, the SD card device is normally /dev/sdb1, so let’s run hdparm against it. ![]() We can use a tool called hdparm to get an easy reading. Let’s get a baseline measurement of read speed before we mess with anything. My SD card - a SanDisk Ultra 32GB - came out of the box formatted as VFAT. Theoretically this should reduce a load time of 120s to 113s. If we configure the readahead setting, I get a read change from 16.67 MB/s -> 17.69 MB/s or about 6% improvement.A basic test shows ext4 and VFAT at default settings have roughly the same read performance.While your card is ext4, it won’t be readable by Windows.I’ll show you how to format your SD card to match this. The file system used by ChromeOS and Android is a Linux format called ext4.What’s best for gaming on an SD card? TL DR On Linux, there are many more filesystems, and they’re more actively developed. VFAT is the de facto format used by most devices like cameras. On Windows, everything runs a Microsoft-defined format called VFAT. For example, Windows has no idea how to read a device formatted with the Linux file system ext4. A given OS on a device will only understand certain file systems. ![]()
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