> For the complete documentation index, see [llms.txt](https://kawsing.gitbook.io/opensystem/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kawsing.gitbook.io/opensystem/andoid-shou-ji/untitled/smart-ci-die-jian-kang-jian-ce.md).
# SMART 磁碟健康檢測
```
smartctl --health /dev/sdb
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.19.0-5-amd64] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: FAILED!
Drive failure expected in less than 24 hours. SAVE ALL DATA.
Failed Attributes:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
2 Throughput_Performance 0x0005 001 001 054 Pre-fail Offline FAILING_NOW 16263
```
在"FAILING\_NOW"情況下，需要盡快備份重要文件，特別是屬性是Pre-fail類型時。
找出有問題的硬碟，讓有問題的硬碟閃燈
```
apt install ldemon
ledctl locate=/dev/sdb(閃燈)
ledctl locate_off=/dev/sdb(停止閃燈)
```
將有問題的磁碟熱插拔，準備更新
查看該媒體是否支援 SMART 檢測
smartctl -i /dev/sdx
使用 *-s* 參數開啟它
smartctl -s on /dev/sdx
使用 *-H* (health)參數來手動檢查硬碟、隨身硬碟的建康狀態
smartctl -H /dev/sdx
一些錯誤資訊參考
1 Raw Read Error Rate 讀取錯誤率 代表硬碟出現瑕疵
2 Throughput Performance 輸出性能 硬碟可能出現瑕疵,或是整體性能老化
3 Spin Up Time 旋上時間 可能代表主軸馬達老化
4 Start/Stop Count 啟/停次數 這個值是硬碟主軸馬達啟動/關閉的次數,一般來說就是你開關電源的次數 由於硬碟馬達啟/停時磨耗最大,所以這是一個壽命參考值,但本身不具任何指標性
5 Reallocated Sector Count 重分配磁區數量 硬碟內部在發現弱磁區時會將弱磁區的資料重新分配到備用區, 這個值代表碟片可能出現瑕疵
6 Read Channel Margin 讀取通道臨界 代表硬碟可能出現瑕疵
7 Seek Error Rate 尋軌錯誤率
8 Seek Time Performance 尋軌效能 代表硬碟可能出現瑕疵,或是性能老化
11 Calibration Retry Count 校準重試次數 這個值下降代表硬碟可能出現瑕疵
12 Power Cycle Count 電源次數 這個值是硬碟電源/關閉的次數,一般來說就是你開關電源的次數 由於硬碟馬達啟/停時磨耗最大,所以這是一個壽命參考值,但本身不具任何指標性
13 Soft Read Error Rate 軟體讀取錯誤率 無法校正的讀取錯誤,通報給作業系統的次數,代表硬碟出現瑕疵
---
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