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Megacli Cheat

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做Raid,用到了megacli,又学了一套命令.

  • 显示Rebuid进度
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/opt/MegaRAID/MegaCli/MegaCli64 -PDRbld -ShowProg -physdrv[20:2] -aALL
  • 查看ES
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/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll -NoLog | grep -Ei "(enclosure|slot)"
  • 查看所有硬盘的状态
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/opt/MegaRAID/MegaCli/MegaCli64 -LDInfo -LALL -aAll
/opt/MegaRAID/MegaCli/MegaCli64 -PDList -aAll -NoLog

如果RAID卡被设置成了writethrough。这个是完全不利用卡上内存的一种做法,操作系统需要确认磁盘全部写入后再返回,io latency很大,而且性能差。

可以强制让他一定使用writeback模式,命令:

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/opt/MegaCli64 -LDSetProp -ForcedWB -Immediate -Lall –aAll

RAID卡上电池没电,单个盘损坏,都会造成RAID策略的变化,所以需要及时检测。

  • 查看所有Virtual Disk的状态
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/opt/MegaRAID/MegaCli/MegaCli64 -LdPdInfo -aAll -NoLog

RAID Level对应关系:

RAID Level : Primary-1, Secondary-0, RAID Level Qualifier-0 RAID 1
RAID Level : Primary-0, Secondary-0, RAID Level Qualifier-0 RAID 0
RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3 RAID 5
RAID Level : Primary-1, Secondary-3, RAID Level Qualifier-0 RAID 10
  • 在线做Raid
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/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r0[0:11] WB NORA Direct CachedBadBBU -strpsz64 -a0 -NoLog
/opt/MegaRAID/MegaCli/MegaCli64 -CfgLdAdd -r5 [12:2,12:3,12:4,12:5,12:6,12:7] WB Direct -a0
  • 点亮指定硬盘(定位)
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/opt/MegaRAID/MegaCli/MegaCli64 -PdLocate -start -physdrv[252:2] -a0
  • 清除Foreign状态
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/opt/MegaRAID/MegaCli/MegaCli64 -CfgForeign -Clear -a0
  • 查看RAID阵列中掉线的盘
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/opt/MegaRAID/MegaCli/MegaCli64 -pdgetmissing -a0
  • 替换坏掉的模块
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/opt/MegaRAID/MegaCli/MegaCli64 -pdreplacemissing -physdrv[12:10] -Array5 -row0 -a0
  • 手动开启rebuid
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/opt/MegaRAID/MegaCli/MegaCli64 -pdrbld -start -physdrv[12:10] -a0
  • 查看Megacli的log
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/opt/MegaRAID/MegaCli/MegaCli64 -FwTermLog dsply -a0 > adp2.log
  • 设置HotSpare
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/opt/MegaRAID/MegaCli/MegaCli64 -pdhsp -set [-Dedicated [-Array2]] [-EnclAffinity] [-nonRevertible] -PhysDrv[4:11] -a0
/opt/MegaRAID/MegaCli/MegaCli64 -pdhsp -set [-EnclAffinity] [-nonRevertible] -PhysDrv[32:1}] -a0
  • 关闭Rebuild
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/opt/MegaRAID/MegaCli/MegaCli64 -AdpAutoRbld -Dsbl -a0
  • 设置rebuild的速率
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/opt/MegaRAID/MegaCli/MegaCli64 -AdpSetProp RebuildRate -30 -a0

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