Change the filesystem on sd cards/usb sticks (was- Permissions)

[Matt Graham]

On 2016-01-18 10:22, Michael Havens wrote:
> so no go on the sd cards then. what about thumb drives?

Putting non-FAT filesystems on USB disks works just fine.  Most modern 
BIOSes will happily read and boot from an ISO9660 or UDF filesystem 
that's been dd'ed to a USB disk.  An ext3 filesystem on a USB disk is 
totally feasible; my removable backup drives are ext3.  The only real 
problem with using ext3 on a removable disk is that it's a pain to read 
that disk from an OS X machine.  (Windows has ext2ifs, which allows 
Windows to treat an ext3 partition as just another drive.)

I don't think that using ext3 on a flash-memory device would improve 
the device's lifetime though.  Flash-memory devices almost always have 
wear-leveling built in at a level lower than the block device layer.  
Logical sector 1 may be mapped to physical sector 4567, and that mapping 
may change at any time.  They had to do this, because the FAT is always 
in the same set of logical sectors, and is written to frequently.

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