information and annualized failure rates: Accuracy Ī field study at Google covering over 100,000 consumer-grade drives from December 2005 to August 2006 found correlations between certain S.M.A.R.T. tests all data and all sectors of a drive by using "off-line data collection" to confirm the drive's health during periods of inactivity. The latest "S.M.A.R.T." technology not only monitors hard drive activities but adds failure prevention by attempting to detect and repair sector errors.Īlso, while earlier versions of the technology only monitored hard drive activity for data that was retrieved by the operating system, this latest S.M.A.R.T. If there is an immediate need to update the offline attributes, the HDD slows down and the offline attributes get updated. online attributes are always updated while the offline attributes get updated when the HDD is not under working condition. provided failure prediction by monitoring certain online hard drive activities.Ī subsequent version of the standard improved failure prediction by adding an automatic off-line read scan to monitor additional operations. (2003) comments that the technology has gone through three phases: These may include increased heat output, increased noise level, problems with reading and writing of data, or an increase in the number of damaged disk sectors. While the eventual failure may be catastrophic, most mechanical failures result from gradual wear and there are usually certain indications that failure is imminent. Mechanical failures account for about 60% of all drive failures. Unpredictable failures which occur without warning due to anything from electronic components becoming defective to a sudden mechanical failure, including failures related to improper handling.Monitoring can determine when such failures are becoming more likely. Predictable failures which result from slow processes such as mechanical wear and gradual degradation of storage surfaces.If Selective self-test is pending on power-up, resume after 0 minute delay.Hard disk and other storage drives are subject to failures (see hard disk drive failure) which can be classified within two basic classes: SMART Selective self-test log data structure revision number 1Ģ55 0 65535 Read_scanning was never startedĪfter scanning selected spans, do NOT read-scan remainder of disk. SMART Self-test log structure revision number 1 Vendor Specific SMART Attributes with Thresholds: SMART Attributes Data Structure revision number: 1 SCT capabilities: (0x003d) SCT Status supported. SMART capabilities: (0x0003) Saves SMART data before enteringĮrror logging capability: (0x01) Error logging supported. Self-test execution status: ( 0) The previous self-test routine completedĬapabilities: (0x53) SMART execute Offline immediate.Īuto Offline data collection on/off support. Offline data collection status: (0x00) Offline data collection activity SMART overall-health self-assessment test result: PASSED SMART support is: Available - device has SMART capability. SATA Version is: SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s) User Capacity: 500,107,862,016 bytes ĭevice is: In smartctl database ĪTA Version is: ACS-2, ATA8-ACS T13/1699-D revision 4c (Phải có một cách để tìm thấy điều này trong OS X tại dòng lệnh.) Đây là một ví dụ về đầu ra: smartctl 6.2 r3841 (local build)Ĭopyright (C) 2002-13, Bruce Allen, Christian Franke, = START OF INFORMATION SECTION = Sau đó bạn có thể chạy nó smartctl -a disk0s3Ĭho báo cáo đầy đủ, nơi disk0s3sao lưu đĩa vật lý có thể tìm thấy trong Disk Utility.app bằng cách lấy thông tin trên ổ đĩa. Gần đây tôi đã có cùng một câu hỏi và tìm thấy một công cụ dòng lệnh có thể được cài đặt qua brew: brew install smartmontools
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