B+ odd issues with SD card (solved)

[clonick]

for boot raspberry py B+ with 64gb microSD or more, you need to format it in FAT32 with 32kb cluster size. (please do not mention "fat" because can be wring interpretation, [exist FAT122, FAT16, FAT32].

also for FAT32 can be in more than 32gb memory, MUST have cluster of 32kb, if you use default size cluster will not format.

for format in windows, you need to to that in COMMAND... so go to start -> {and search for "CMD"]
in CMD put:

Code: Select all

format z: /FS:fat32 /x /a:32k

where Z: is the SD drive you what to format.

[mahjongg]

FAT122? whats that never heard of it, and Google tuns up nothing! is it older or newer than FAT32? (for lower higher capacities?

[rpdom]

FAT122? whats that never heard of it, and Google tuns up nothing! is it older or newer than FAT32? (for lower higher capacities?

A tyop for FAT12? It was used on floppies, I believe. I have a boot about it somewhere.

[mahjongg]

lots of typo's

Yeah, I was wondering if you meant FAT12.

I was actually under the impression that FAT12, FAT16 and FAT32 were all compatible with the boot loader code, but perhaps FAT12 doesn't give the needed file space...

If someone has a source that tells us otherwise please tell.

Ive just advised to use FAT32 because its the best supported, but I think for the boot code it doesn't matter as long as it can find its boot file using the FAT's directory structure, which should be compatible for any FAT file structure.

[rpdom]

FAT16 and FAT32 definitely work. I just tried them with a bare metal test system on a 16MB card.

I also tried with a 15MB FAT12 partition, but that didn't work at all. (FAT12 supports up to 32MB disks which is plenty or what I'm trying)

[jaack65]

FAT16 and FAT32 definitely work. I just tried them with a bare metal test system on a 16MB card.

I also tried with a 15MB FAT12 partition, but that didn't work at all. (FAT12 supports up to 32MB disks which is plenty or what I'm trying)

So an 8Gb SD card should be formatted as FAT16. Have been seeing "format as FAT" in ALL DOC about installing LINUX distro on Pi storage but there isn't a FAT without any numbers. Using GParted on Ubuntu system and only has FAT16 or FAT32 as option. Will FAT16 format give m a smaller "sector" size and therefore more sectors per device? Seen FAT12 displayed on blank drives both memory cards and rotating disk drives by program looking at partition table.

[rpdom]

So an 8Gb SD card should be formatted as FAT16. Have been seeing "format as FAT" in ALL DOC about installing LINUX distro on Pi storage but there isn't a FAT without any numbers. Using GParted on Ubuntu system and only has FAT16 or FAT32 as option. Will FAT16 format give m a smaller "sector" size and therefore more sectors per device? Seen FAT12 displayed on blank drives both memory cards and rotating disk drives by program looking at partition table.

An 8GB card should be formatted as FAT32. I doubt that FAT16 supports capacities that large.

The numbers on the FATnn refer to the number of bits used for entries in the FAT tables and from that determine the maximum number of clusters in the system. The larger the number the more clusters of sectors the file system will support. Go for FAT32.

[fruitoftheloom]

http://en.wikipedia.org/wiki/File_Alloc ... inal_FAT16