Toshiba Portege R500 Maintenance Manual - Page 139

3.13 Hard Disk Test 3 Tests and Diagnostics 3. The Hard Disk Test message will appear after you respond to the Detail Status prompt. Select the number of the subtest you want to execute and press Enter. The following message will appear during each subtest. HARD DISK TEST XXXXXXX SUB TEST PASS COUNT WRITE DATA ADDRESS : XX : XXXXX : XX : XXXXXX XXX DIAGNOSTIC TEST VX.XX [Ctrl]+[Break] : test end [Ctrl]+[C] : key stop ERROR COUNT READ DATA STATUS : XXXXX : XX : XXX The first three digits of the ADDRESS indicate which cylinder is being tested, the fourth digit indicates the head number and the last two digits indicate the sector number. The first digit of the STATUS indicates the drive being tested and the last two digits indicate the error status code as explained in the table 3-2 of the section 3.18. Subtest 01 Sequential read This subtest is a sequential reading of all the tracks on the HDD starting at track 0. When all the tracks on the HDD have been read, the test starts at the maximum track and reads the tracks on the HDD sequentially back to track 0. Subtest 02 Address uniqueness This subtest writes unique address data to each sector of the HDD track-bytrack. The data written to each sector is then read and compared with the original data. There are three ways the HDD can be read: 1. Forward sequential 2. Reverse sequential 3. Random Subtest 03 Random address/data This subtest writes random data in a random length to random addresses. This data is then read and compared to the original data. PORTEGE R500 Maintenance Manual (960-634) [CONFIDENTIAL] 3-27