=== DSCA,DSCB (Winape) ===
The DSCA block contains the filename of the disc image inserted into drive A. The filename is stored as 8-bit ASCII (any Unicode characters with codes 0x100 or above will be translated to ? and therefore filenames with these characters can't be stored in Snapshots). The length of the block is the length of the filename in bytes.
DSCB is similar to DSCA but stores the filename of the disc image inserted into drive B.