See also Health Status.
A part of Maxtor HDD could count only 65535 minuites (about 1092 hours).
The field of buffer size supports maximum 32 MB and this filed is obsolete.
Reference: Detecting Buffer or Cache Size in ATA Hard Disk Drives (Seagate)
The filed of rotation rate is defined by ATA8-ACS. So, almost disks does not report rotation rate...
SAMSUNG HD155UI/HD204UI has data loss bug. CrystalDiskInfo does not access these disks by default.
Please change the settings from "Function > Advanced Feature > [DEBUG] USB/IEEE 1394".