user: Question: What is the smallest transfer rate for a 3243 device?
Columns: ['Device', 'Device type', 'Capacity [MB]', 'Avg seek time [ms]', 'Avg rotational delay [ms]', 'Avg transfer rate [kB/s]']
Types: ['real', 'text', 'text', 'text', 'real', 'real']
Sample row: [3214.0, 'RAD', '2.75', 'N/A', 8.5, 647.0]
SQL:

assistant: SELECT MIN("Avg transfer rate [kB/s]") FROM "Table" WHERE "Device" = 3243.0;