Better knowledge Hard Disk

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Hard disk cases	Typical and special situations, status and recommendations for different hard disks.
Storage information	Browse the online hard disk drive database and get complete information about hard disk drives.
Storage statistics	View hard disk statistics calculated by the reported hard disk information and failures.
S.M.A.R.T. function	If you are interested how Hard Disk Sentinel works, why it is different from other products in terms of failure prediction, please read this article.
HDSDOS with pendrive	Information about how to create and use bootable pendrives (or other USB drives) wih Hard Disk Sentinel DOS version for checking without starting the operating system.: Disk Utility - Using Disk Utility to Repair Hard Drives macs.about.com/od/applications/ss/firstaid_2.htm After a successful repair, Disk Utility won't display any error or warning messages, and will display green text specifying the volume is OK. Disk Utility’s Repair Disk feature can work with any hard drive connected to your Mac, except the startup disk. If you need to