All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

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All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby seastalker » Thu Jun 23, 2016 8:28 pm

On the Mist "Getting Started" page at https://github.com/mist-devel/mist-boar ... ingStarted
newcomers may benefit from more detail in prepping an SD card. Do many format options work or just some? Fat16? Fat32, exfat or just plain Fat? Will the default allocation size create problems later after copying so many files over? What about NTFS or Linux EXT formats? I think a sticky somewhere
or update to the page would be handy.

I've been messing with the mist and both SD and Micro SD. As a general rule, try to go as direct as possible from card to PC (exclude as many adapters like micro to standard SD, USB hubs and extension USB cables... better to climb on hands and knees behind your PC if need be!!) :) Cost vs noticeable performance would be good to know. For example, I could buy Class 10 64GB cards say when cheaper standard 2gb-4gb SD (non SDXC or SDHC) may work perfectly. I am heeding the advice of multiple cards due to disk corruption too. :)

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby Sorgelig » Fri Jun 24, 2016 2:31 am

1) There is no such format as a "plain FAT". It's either FAT16 or FAT32 or exFAT.
2) only FAT16 and FAT32 are supported. Neither NTFS, nor EXT, nor exFAT are supported.
3) in most cores SDHC cards are supported, but you may keep spare old SD card for cores not supporting SDHC (actually i don't know such cores).
4) SD card up to 8GB should be enough for everything. So, you don't need SDXC. I don't know if SDXC is supported. It's simply don't need to.
5) all retro computers and consoles were operated with slow storage in real life and thus won't gain any performance boost from latest high-speed SD cards.

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby Newsdee » Fri Jun 24, 2016 5:47 am

Regarding 3), I have previously reformatted a high capacity card to pretend to have less than 4GB. But I remember I had to do it with a special SD formatter utility.

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby Newsdee » Fri Jun 24, 2016 5:48 am

Feels a bit like a waste to use 8GB+ cards but around me it's all there is. Older 4GB cards have almost the same price!

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby rrmagro » Fri Jun 24, 2016 8:06 am

Buy the way external USB storage was being developed, do you guys know, how this is going?

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby mahen » Fri Jun 24, 2016 9:14 am

I tried a 64 GB card which worked flawlessly. It's not that useless if like me you have huge collections and big hard drives. For instance I use 2*4GB hdf for the Amiga (which is pretty useful for a whole WHDLoad set + MODS anthology :)
Amiga user since 1993 ;-)

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby seastalker » Fri Jun 24, 2016 5:04 pm

Perfect, Sorgelig! Who runs the "Getting Started" page? In the paragraph about formatting a SD card, they should include a "for more info on SD formatting click HERE" and then link to a sub page with a copy paste of your response. :)

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby tenox » Fri Jun 24, 2016 8:36 pm

Sorgelig wrote:1) There is no such format as a "plain FAT". It's either FAT16 or FAT32 or exFAT.


There is FAT12 and even FAT8

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Re: All Things SD: Fat vs Fat32 vs. Exfat + Allocation Unit Size

Postby Sorgelig » Sat Jun 25, 2016 7:34 am

tenox wrote:There is FAT12 and even FAT8

not used on SD card.


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