CecilWard
Posts: 39
Joined: Sat Sep 03, 2016 10:17 pm

Maximum size of boot drive

Fri Jan 05, 2018 10:25 pm

I'm looking at buying something like this as a boot drive for my Raspberry Pi 3
http://www.amazon.co.uk/dp/B06XFHQGB9/_ ... 9L7B&psc=0

Will it work? Someone suggested there might be a problem with it being too large, which good file system can I get on it to boot from?

drgeoff
Posts: 9900
Joined: Wed Jan 25, 2012 6:39 pm

Re: Maximum size of boot drive

Fri Jan 05, 2018 10:57 pm

Yes a 128 Gbyte card will work. You can load an OS image file to that without any problem. If you want to use NOOBS you must first change the card's format from exFAT to FAT32. See viewtopic.php?f=91&t=83372&p=651745#p677748

CecilWard
Posts: 39
Joined: Sat Sep 03, 2016 10:17 pm

Re: Maximum size of boot drive

Fri Jan 05, 2018 11:58 pm

Many thanks!

What is the good file system i should be using for performance and reliability given that I have to be able to boot off that same drive? (I'm a retired asm and C r+d programmer, long experience with NT and before that VAX/VMS but totally ignorant about *nix)

User avatar
rpdom
Posts: 15412
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Maximum size of boot drive

Sat Jan 06, 2018 3:24 am

The initial boot partition needs to be MS-DOS FAT format (FAT32 or possibly FAT16). If you use Raspbian (recommended OS), the main partition will be ext4.

But you don't have to worry about creating those if you use the recommended method and just use Etcher (etcher.io) to write a Raspbian image to the card. The partitioning is built into the image. During the first boot (which may take some time), the partition in the image will be automatically expanded to fill the card.

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