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Storage
=========
The Nokia N900 has 32 GB eMMC and 256 MB NAND non-removable storage.
Additional storage is available via a hot swappable microSDHC card
socket, which is claimed to support up to 64 GB of additional storage.
However, the SDHC specification supports cards only up to 32 GB in
size, and some difficulty has been reported with the use of 64 GB SDXC
cards.  Sandisk claims that SDXC cards are not compatible with the
N900.

Hot swapping is achieved via a software-supported magnetic sensor
which detects removal of the back cover, so the partition residing on
a microSDHC card is unmounted when the back cover is removed.  The
microSDHC card can be formatted with a supported file system such as
ext2, ext3, FAT16 and FAT32.

The 32 GB eMMC is split into 3 partitions:
* 2 GB as ext3 mounted to /home
* 768 MB as swap
* the remainder as VFAT mounted to /home/user/MyDocs with about 27 GB
of free space.

The 256 MB NAND is formatted as UBIFS and contains the bootloader,
kernel image and root directory "/" with about 100 MB of free space.

Programs larger than 500 kB including dependencies should be stored in
/opt  which is symlinked to /home/opt and therefore located on the 2
GB ext3 partition. The VFAT partition is also available for storage
but needs to be used carefully as it is unmounted and exported if a
USB cable is connected to the device.

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SOURCE: gopher://gopherpedia.com/0/Nokia%20N900
2018/12/17 17:52