In [2]: frase = 'sd1 Soft Errors: 0 Hard Errors: 0 Transport Errors: 0 Vendor: SEAGATE  Product: ST373307LSUN72G  Revision: 0507 Serial No: 3HZ9JBYN000 07518 Size: 73.40GB "73400057856 bytes" Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0 Illegal Request: 0 Predictive Failure Analysis: 0'

In [3]: lista = frase.split(" ")

In [4]: lista
Out[4]:
['sd1',
 'Soft',
 'Errors:',
 '0',
 'Hard',
 'Errors:',
 '0',
 'Transport',
 'Errors:',
 '0',
 'Vendor:',
 'SEAGATE',
 '',
 'Product:',
 'ST373307LSUN72G',
 '',
 'Revision:',
 '0507',
 'Serial',
 'No:',
 '3HZ9JBYN000',
 '07518',
 'Size:',
 '73.40GB',
 '"73400057856',
 'bytes"',
 'Media',
 'Error:',
 '0',
 'Device',
 'Not',
 'Ready:',
 '0',
 'No',
 'Device:',
 '0',
 'Recoverable:',
 '0',
 'Illegal',
 'Request:',
 '0',
 'Predictive',
 'Failure',
 'Analysis:',
 '0']