IBM IC35L020 Hard Drive Specifications - Page 187
Self-test log data structure, Note: n is 0 through 20
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15.32.15 Self-test log data structure The following figure defines the 512 bytes that make up the Self-test log sector. All multibyte fields shown in these data structures are in byte ordering. Description Data structure revision Self-test number Self-test execution status Life time power on hours Self-test failure check point LBA of first failure Vendor specific ... Vendor specific Self-test log pointer Reserved Data structure checksum Note: n is 0 through 20 Byte 2 1 1 2 1 4 15 2 1 2 1 512 Offset 00h n*18h+02h n*18h+03h n*18h+04h n*18h+06h n*18h+07h n*18h+0Bh 1FAh 1FCh 1FDh 1FFh Figure 131. Self-test log data structure The data structure contains the descriptor of Self-test that the device has performed. Each descriptor is 24 bytes long and the self-test data structure is capable of containing up to 21 descriptors. After 21 descriptors have been recorded, the oldest descriptor will be overwritten with a new descriptor. The self-test log pointer points to the most recent descriptor. When there is no descriptor, the value is 0. When there is descriptor(s) the value is 1 through 21. Deskstar 60 GXP Hard disk drive specification 173