Maximum size of microSD card


(Wladimir van der Laan) #1

What is the maximum microSD card supported by the HiFive Unleashed board? Would, say, a 400GB one work?
(when running Linux)


(Jim Wilson) #2

I don’t know if there is a maximum supported size, but my experience is that the SDcard is too slow and unreliable to be useful for serious development. You will have better luck using network attached storage, e.g. mounting a disk via NFS or similar. The Fedora developers are using an NBD enabled kernel to mount the root file system from a server, which is what I personally use.


(Wladimir van der Laan) #3

Good to know, thanks !

nbd is reasonably convenient, though I had had hoped for a more self-contained solution.


(Wladimir van der Laan) #4

Update: a 400GB SDcard seems to work
haven’t tried if it can address the entire thing but it manages to mount it and open files on it

[ 1.146357] mmc0: new SDXC card on SPI
[ 1.150604] mmcblk0: mmc0:0000 SC400 367 GiB
[ 1.183857] mmcblk0: p1 p2

Edit: have also noticed the instability now, after a while, for example when copying a large file, SD card access (at least writing) simply seems to hang. I hope this will be solved at some point !