Storable is an XS module that (quickly) serializes and unserializes Perl data structures to and from its own binary format. The idea is to build the @PPN and @LPN indexes once and then save those as (presumably much smaller) files alongside the image. Actual usage is to read the index arrays back in full, then open the image file and seek/read/unpack only the data that you need for each analysis from the full image.

For efficiency, the controller is likely to batch writes until it has a full erase block and only then "flush the buffers" out to the NAND array, and there may even be structures larger than an erase block that are significant to the FTL. The odd "bank 32" data hints at such a structure. How long is that apparent field?

If the FTL uses a log structure, the "LBA 128" field might be the write sequence number you have been looking for. The nonsensical "LBA" list may simply be garbage, "unused" space that gets written with whatever happened to be in the controller's memory when writing the block. In other words, it may be a list of LPNs, but not LPNs that are relevant to the current state of the NAND array. Or, in C terms, the contents of an uninitialized buffer.

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In reply to Re^2: Adding cols to 3d arrays - syntax by jcb
in thread Adding cols to 3d arrays - syntax by peterrowse

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