Re: How to backup X-profile & IDEfile compact flash cards

On 7 Apr., 08:13, Nama <forums6..._at_email.domain.hidden> wrote:

> How would I make backup copies of my X-profile and IDEfile compact > flash cards in case the cards die or are accidentally erased.

1. To archive a whole card, connect it to your PC in a way that it is recognized as an IDE drive (i.e. CF-to-IDE & IDE-to-USB adapter, or CF- -PCMCIA). Then use your favourite drive imager tool (or linux dd) to copy the whole card into a file.

To restore, copy the file back onto a card with the same or bigger size.

b) To grab single volumes from an IDEfile card or image file, the procedure is as follows:

• get the Volume Table Block from sector 0x200. You should be able to read the string "IDEfile" at offset 0x10.
• the volume table starts at offset 0x30. There are 16 bytes for each volume. Here is an example: 0030: 81 000101 4C00 000000000000000000 CD

81 means Volume 0, Type 1. 000101 is the start address in IDEfile blocks. Multiply this by 2 to get IDE LBA sector numbers. 4C00 is the number of blocks in the volume, CD is a checksum. So this example starts at IDE sector 0x202 and has a length of 0x9800 IDE sectors.

• having identified the volume's start address and length, use dd or something like this to grab the volume data. A 10MB volume (0x4C00 blocks) occupies 0x9800 sectors. This is because LisaOS writes 532 bytes per block and an IDE sector accepts only 512 bytes. Therefore two IDE sectors are used for one IDEfile block. c) To write back a single volume from file into the IDEfile CF card:
• use your IDEfile to setup the card and generate at least one volume with the correct size. Remember the volume number.
• look into the volume table to get start address and length. Multiply these values by two to get IDE LBA sector numbers.
• use dd to put your data into the existing volume structure d) To backup a volume into another on the SAME card:
• use IDEfile's "k" command

IDEfile has a "d"ump command to view the contents of a data block via RS-232. To see the volume table, load it into memory with the "v" command, then "d"ump it.

Hope that helps
Patrick

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