raid card with ssd cache

, while the 0,1 and 1+0 three levels support IDE RAID. The so-called RAID 0 is based on at least two hard drives, in IDE raid, it takes CPU time to divide the data stream into chunks of the same size, and then distributes it evenly to two hard drives to complete the transmission; the so-called RAID 1 is to occupy CPU p

function is not available: Adapter 0: Get BBU Status Failed. FW error description: The required hardware component is not present. Exit Code: 0x22View the current RAID card Cache Policy MegaCli64 -LDinfo -Lall -aAll Default Cache Policy: WriteThrough, ReadAheadNone, Direct, No Write

Tags: Description enc require start nal alt next improve other Recently encountered a strange problem Receive SMS alert says disk IO is very high replication latency Iostat-x 1 10 information is as follows: The QPS is as follows: The load is very low pressure is very low this is very no solution. Only one MySQL Actually, it's a hardware problem.Megasas RAID card BBU learn cycle backgroundRecently encou

current BBU properties # megacli-adpbbucmd-getbbuproperties–aall View charge Progress percentage # megacli-adpbbucmd-getbbustatus-aall |grep "Relative State of Charge" query RAID array number # Megacli-cfgdsply-aall |grep "Number of disk GROUPS:" Display RAID card model, RAID settings, DISK related information # me

protected] robin]# Megacli-pdlist-aall# # #有如下样式的几段, which shows the actual number of hard drives (below is a piece of 500G SSD information)Enclosure Device id:32Slot Number:3Drive ' s postion:diskgroup:0, Span:1, arm:1Enclosure position:0Device Id:3wwn:50025388a0061518Sequence Number:2Media Error count:0Other Error count:0Predictive Failure count:0Last predictive Failure Event Seq number:0PD Type:sataRaw size:465.761 GB [0x3a386030 sectors]Non coerc

protection function:Adapter 0:get BBU Status Failed.FW Error Description:The required hardware component is not present.Exit code:0x22View current RAID Card cache policyMegacli64-ldinfo-lall-aallDefault Cache Policy:writethrough, Readaheadnone, Direct, No Write cache if bad

protection function:Adapter 0:get BBU Status Failed.FW Error Description:The required hardware component is not present.Exit code:0x22View current RAID Card cache policyMegacli64-ldinfo-lall-aallDefault Cache Policy:writethrough, Readaheadnone, Direct, No Write cache if bad

battery comes, there is a capacitor, the capacitor attached to a cache card, the cache card to be inserted on the RAID card, the role of this cache

Boot press F2 to enter system SetupDevice Settings650) this.width=650; "title=" 1.png "style=" Float:none; "src=" http://s3.51cto.com/wyfs02/M02/6C/24/ Wkiom1valbbdjfxbaadjrqhmegk335.jpg "alt=" Wkiom1valbbdjfxbaadjrqhmegk335.jpg "/>Integrated RAID Controller 1:dell perc650) this.width=650; "Width=" 599 "height=" 294 "title=" 2.png "style=" Width:438px;height:219px;float:none; "src=" http ://s3.51cto.com/wyfs02/m01/6c/24/wkiom1valbersd1kaahxaac6wp8851.

A Dell nx3200 NAS storage (Dell r720) cannot enter the system when it is started, and the raid configuration cannot be detected on the raid card configuration page when you press F10 F2 F12 F11. Fault prompt:There are offline ormissing virtual drives with preserved CachePlease check the cables and ensure that all drives are presentPress any key to enter the co

Original http://www.mysqlsupport.cn/megacli-study/ Author: Wu Bingxi Source: http://www.mysqlsupport.cn/contact information: wubingxi # gmail.com reprint please indicate/translator and source, and cannot be used for commercial purposes, offenders must investigate. Megacli common parametersMegacli-adpcount [display the number of adapters]Megacli-adpgettime-aall [display adapter time]Megacli-adpallinfo-aall [show all adapters]Megacli-ldinfo-Lall-aall [display information of all Logical Disk grou

1 IntroductionThe RAID card battery on the server, referred to as the BBU, is a very important component, it has a large impact on the I/O performance of the disk, but the general Bbu power can only be used for 90 days, the system will automatically charge it after the power is exhausted, but it usually takes a few hours to charge, during charging, The cache stat