On Thursday 25 April 2013 01:28:40 Zavi wrote:
> I've been reading on MLC flash lately, and saw that erase blocks must
> be written sequentially. Does this mean that YAFFS2 manages a single
> MLC chip so that there is only one "open" erase block used for writing
> in every point in time? and only when it is filled can data be written
> to an other erase block?
Yes
Yaffs2 is log structured which means it writes as a sequential log. That means
it only writes sequentially to one block at a time. When that block is full
it finds another block to write to.
The blocks that are written are not necessarily sequential, but writes within
a block are.
Yaffs2 will generally fill a block before moving to another block, but there
are some exceptions:
* If there is an error.
* On every remount it starts with a new block.
-- CHarles
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