[Alauda] How to obtain usuable block number in the card?

[Harsh V. <hj...@gm...>]

Hi,
I am working with 1 GB xD-Picture card and trying to figure out its specs.
I am reading logs from usbsnoop and have find out that it also has 512 as
page size and 32 pages per block.
I am wondering how could you obtain the usable block size and also number of
zones in the card.
I used libusb.
usb_bulk_write ( 0x40, 0xb4, pba_hi, pba_zone, 0, pba_lo + page_offset,
pages, 0, 0) -- I can use this command to write (at least it look like) for
any value of pba_hi, pba_lo and pba_zone. How could I figure out which pages
are safe to write?
TIA
Harsh
Kanpur, India