Cypher Technology Ltd V2.6 (03) December 2011
11
4.4.8
Verify Master Copy against Flash Card
This function will check that the contents of the inserted Master Disk are identical to the
inserted flash card.
Where a multi-disk set has been produced, any numbered disk may be checked
individually.
4.4.9
Verify Multi-Disk Master Set
To verify a Master disk set (i.e. all the disks in a multi-disk Master), the procedure is
different for a Full and Compact Master
Full Master: Insert Disk #1 first, then 2, 3, 4 etc.
Compact Master: Insert LAST disk first and then feed disks in reverse order. So if there
are 4 disks in the set, disk #4 first then 3, 2 and 1.
4.4.10
Restore the Master Copy to a Flash Card
This function will copy the contents of the inserted Master disk to the inserted flash card.
This flash card will become a precise clone of the original card. Where the card is bigger
than the original card, the excess data on the card will be zeroed.
Use a flash card that is the same size or bigger than the original.
When completed the checksum of the flash card (and the disk) is displayed. This card
is functionally identical to the original. It may be inserted back into the camera or may
be read on a computer and the images viewed or the files accessed.
4.4.11
Restore Multi-Disk Master Set
As above, use a flash card that is the same size or bigger than the original.
To restore a Master disk set (i.e. more than one disk for a particular flash card), the
procedure is different for a Full and Compact Master
Use a flash card that is the same size or bigger than the original.
Full Master: Insert Disk #1 first, then 2 a3, 4 etc.
Compact Master: Insert LAST disk first and then feed disks in reverse order. So if there
are 4 disks in the set, disk #4 first then 3, 2, 1.
4.4.12
Wipe Flash Card
This function will perform a forensic wipe of the flash card. No data will be recoverable
from the card after this operation (see below).
This function writes “0”s to the card. After the card is wiped, it is formatted as FAT32
and is ready for use.
4.4.13
Calculate the Checksum of the Flash Card
This function will generate a unique number from the contents of the flash card. This is
called a checksum (see below). This number provides a useful and secure identification
for the card and the Master Copy. The checksum of the card will be the same as the
checksum of the Master image file for that card or the same as the sum of the
checksums for the individual disks for a multi-disk set (modulo 32 bit).