Lenovo ThinkCentre M70z Hardware Maintenance Manual (HMM) - Page 41
Quick and Full erase - hard drive
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Function Code Failure Type DeviceID Date ChkDigits Text • Function Code: Represents the feature or function within the PC. • Failure Type: Represents the type of error encountered. • DeviceID: Contains the component's unit-ID that corresponds to either a fixed disk drive, removable media drive, serial or parallel port, processor, specific RIMM, or a device on the PCI bus. • Date: Contains the date when the diagnostic test was run. The date is retrieved from CMOS and displayed using the YYYYMMDD format. • ChkDigits: Contains a 2-digit check-digit value to ensure the following: - Diagnostics were run on the specified date. - Diagnostics were run on the specified computer. - The diagnostic error code is recorded correctly. • Text: Description of the error. Note: See "Diagnostic error codes" on page 42 for error code listings. Quick and Full erase - hard drive The diagnostics program offers two hard drive format utilities: • Quick Erase Hard Drive • Full Erase Hard Drive Quick Erase Hard Drive provides a DOS utility that performs the following: • Destroys the Master Boot Record (MBR) on the hard drive. • Destroys all copies of the FAT Table on all partitions (both the master and backup). • Destroys the partition table. • Provides messages that warn the user that this is a non-recoverable process. Full Erase Hard Drive provides a DOS utility that performs the following: • Performs all the steps in Quick Erase. • Provides a DOS utility that writes random data to all sectors of the hard drive. • Provides an estimate of time to completion along with a visual representation of completion status. • Provides messages that warn the user about non-recoverable process. Important: Make sure that all data is backed up before using the Quick or Full Erase functions. To select the Quick Erase or Full Erase Hard Drive utility. Do the following: 1. Select the UTILITY option on the toolbar and press Enter. 2. Select either the QUICK ERASE or FULL ERASE HARD DISK option and follow the instructions. Chapter 5. Diagnostics 35