Linux
這是一個嚴重的 RAID 錯誤嗎？
如果我執行以下操作
/opt/MegaRAID/MegaCli/MegaCli -LDInfo -Lall -aAll -NoLog > /tmp/tmp /opt/MegaRAID/MegaCli/MegaCli -LDPDInfo -aAll -NoLog >> /tmp/tmp然後我看到這些錯誤
Media Error Count: 11 Other Error Count: 5問題
他們是什麼意思？他們很挑剔嗎？
完整輸出：
Adapter 0 -- Virtual Drive Information: Virtual Disk: 0 (target id: 0) Name:Virtual Disk 0 RAID Level: Primary-5, Secondary-0, RAID Level Qualifier-3 Size:951296MB State: Optimal Stripe Size: 64kB Number Of Drives:5 Span Depth:1 Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU Current Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU Access Policy: Read/Write Disk Cache Policy: Disk's Default Adapter #0 Number of Virtual Disks: 1 Virtual Disk: 0 (target id: 0) Name:Virtual Disk 0 RAID Level: Primary-5, Secondary-0, RAID Level Qualifier-3 Size:951296MB State: Optimal Stripe Size: 64kB Number Of Drives:5 Span Depth:1 Default Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU Current Cache Policy: WriteBack, ReadAheadNone, Direct, No Write Cache if Bad BBU Access Policy: Read/Write Disk Cache Policy: Disk's Default Number of Spans: 1 Span: 0 - Number of PDs: 5 PD: 0 Information Enclosure Device ID: N/A Slot Number: 0 Device Id: 0 Sequence Number: 2 Media Error Count: 0 Other Error Count: 0 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 Raw Size: 238418MB [0x1d1a94a2 Sectors] Non Coerced Size: 237906MB [0x1d0a94a2 Sectors] Coerced Size: 237824MB [0x1d080000 Sectors] Firmware state: Online SAS Address(0): 0x1221000000000000 Connected Port Number: 0 Inquiry Data: ATA WDC WD2500JS-75N2E04 WD-WCANK9523610 PD: 1 Information Enclosure Device ID: N/A Slot Number: 1 Device Id: 1 Sequence Number: 2 Media Error Count: 11 Other Error Count: 5 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 Raw Size: 238418MB [0x1d1a94a2 Sectors] Non Coerced Size: 237906MB [0x1d0a94a2 Sectors] Coerced Size: 237824MB [0x1d080000 Sectors] Firmware state: Online SAS Address(0): 0x1221000001000000 Connected Port Number: 1 Inquiry Data: ATA WDC WD2500JS-75N2E04 WD-WCANK9507278 PD: 2 Information Enclosure Device ID: N/A Slot Number: 2 Device Id: 2 Sequence Number: 2 Media Error Count: 0 Other Error Count: 0 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 Raw Size: 238418MB [0x1d1a94a2 Sectors] Non Coerced Size: 237906MB [0x1d0a94a2 Sectors] Coerced Size: 237824MB [0x1d080000 Sectors] Firmware state: Online SAS Address(0): 0x1221000002000000 Connected Port Number: 2 Inquiry Data: ATA WDC WD2500JS-75N2E04 WD-WCANK9504713 PD: 3 Information Enclosure Device ID: N/A Slot Number: 3 Device Id: 3 Sequence Number: 2 Media Error Count: 0 Other Error Count: 0 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 Raw Size: 238418MB [0x1d1a94a2 Sectors] Non Coerced Size: 237906MB [0x1d0a94a2 Sectors] Coerced Size: 237824MB [0x1d080000 Sectors] Firmware state: Online SAS Address(0): 0x1221000003000000 Connected Port Number: 3 Inquiry Data: ATA WDC WD2500JS-75N2E04 WD-WCANK9503028 PD: 4 Information Enclosure Device ID: N/A Slot Number: 4 Device Id: 4 Sequence Number: 2 Media Error Count: 0 Other Error Count: 0 Predictive Failure Count: 0 Last Predictive Failure Event Seq Number: 0 Raw Size: 238418MB [0x1d1a94a2 Sectors] Non Coerced Size: 237906MB [0x1d0a94a2 Sectors] Coerced Size: 237824MB [0x1d080000 Sectors] Firmware state: Online SAS Address(0): 0x1221000004000000 Connected Port Number: 4 Inquiry Data: ATA WDC WD2500JS-75N2E04 WD-WCANK9503793
插槽 1 中的驅動器有問題。它是 RAID 5，因此您的數據受到保護，但您失去了冗餘（一個磁碟不可靠）。媒體錯誤意味著驅動器用完備用扇區以將壞扇區重新映射到（
http://kb.lsi.com/KnowledgebaseArticle15809.aspxhttp://mycusthelp.info/LSI/_cs/AnswerDetail.aspx?inc=7468）。如果是我的數據，我會在備份時加倍謹慎，移除驅動器，用新驅動器替換它並同步陣列。一些供應商（例如 IBM）會接受基於故障預測指標的 RMA，而另一些則不會。如果您的供應商不接受帶有壞的、不可重新映射的扇區的磁碟有故障，則將其從陣列中取出並在測試系統中進行測試。它應該在合理的時間內失敗。編輯：
只有插槽 ID 為 1 的磁碟的媒體事件才非零。在您提供的日誌中，每個條目都有插槽 ID。奇怪的是，儘管磁碟上有媒體錯誤，但 raid 報告其狀態為最佳狀態。不過，我不會相信磁碟。
由 n 個相同大小的磁碟組成的 RAID 5 為您提供了 (n-1) 個磁碟的容量，因為它儲存了一個磁碟的冗餘數據。因此，如果您有 6 個 250 GB 磁碟和 1T 可用空間，它們很可能被劃分為 5 個磁碟 RAID 5（為您提供 4x250 GB 可用空間）加上 1 個備用磁碟。