The lstart, size, and vstart Columns

lstart column – the starting page number in the database of this allocation unit. Each database starts at logical address 0. If additional allocations have been made for a database, as in the case of dbid 7, the lstart column reflects this.

size column – the number of contiguous pages that are assigned to the same database. The ending logical address of this portion of the database can be determined by adding the values in lstart and size.

vstart column – the address where the piece assigned to this database begins.

vdevno – the device in which this database fragment resides.