Is there any document that explains the command line switches of megacli better than the cryptic output of megacli64 -h ? The machine is an IBM x3650 m3 to which I added three more disks. Asked by adamo Yes, it’s called the MegaRAID SAS Software User Guide (beware, link may load very slowly). See Chapter 5, MegaRAID Command Tool. Answered by Michael Hampton Check more discussion of this question. Bookmark on Delicious Digg this post [...]Continue Reading »
This server is a Dell R200 running Ubuntu 8.04LTS using a LSI SAS1068E raid card supplied from Dell, I suspect that there might be some kind of RAID issue with the hardware raid built into the motherboard, but I can’t seem to get MegaCLi to return any useful output: root@81 $ ./MegaCli -AdpAllInfo -aALLroot@81 $ ./MegaCli -PDList -aALLroot@81 $ The disks work and AFAIK the raid software is installed correctly. I’ve seen this issue on [...]Continue Reading »
MegaRAID Storage Manager Error 1920 “Service MRMonitor (MegaMonitorSrv) failed to start.” on Windows Server 2003 R2 x64
I’m trying to install the MegaRAID Storage Manager 8.10 provided by SUPERMICRO, but I keep getting an error 1920 that “Service MRMonitor (MegaMonitorSrv) failed to start. Verify that you have sufficient privileges to start system services.” I’m installing it as the administrator and I’ve confirmed that I have “Log on as a service” permissions set in the Default Domain Security Settings and the Default Domain Controller Security Settings. I’ve also confirmed that the SNMP service [...]Continue Reading »
I wanted to test performance in a RAID10 with a “damaged drive”. To simulate this situation I’ve set a single drive to “Offline” by using this command: MegaCli -PDOffline -PhysDrv [45:12] -aAll The drive went offline but directly with this command another drive switched to “failed”. I checked the status of all drives before performing this command. All were marked as online. Does setting a drive “offline” puts alot of pressure on the hardware so [...]Continue Reading »
I have 22 disks and would like to create a Raid 10. Unfortunately my raid controller (MegaRAID SAS 9260-8i) is only capable to handle 8 arrays within a RAID 10. Because of that I could only use 16 disks in a 2 disks per array configuration. I’ve figured out that it would be possible to use 2 arrays with 10 disks each: MegaCli -CfgSpanAdd -r10 -Array0[20:2,20:3,20:4,20:5,20:6,20:7,20:8,20:9,20:10,20:11] -Array1[28:1,28:2,28:3,28:4,28:5,28:6,28:7,28:8,28:9,28:10,28:11,28:12] Direct WB -a0 After reading through the manual [...]Continue Reading »
It seems that MegaRAID doesn’t support JBOD (unfortunately). I’ve read online that to make the controller act as a pass-through, I should configure the disks in raid 0. What raid 0 settings do you recommend? Are you trying to use the card for a software RAID solution like ZFS? Which controller are you using? If this is the case, using multiple RAID-0 logical drives will create an ugly situation if you need to swap a [...]Continue Reading »
Our file server just started mailing us about how its battery backup is draining and it’s switching from WB to WT mode and so on. I looked through its logs and found that it is configured to automatically do this periodically. It’s called “battery relearning”. What is this for? How often will it decide it needs to do this automatically? I searched the LSI docs and all I could find was the different status codes [...]Continue Reading »
I have a RAID 1 + hot spare that I would like to reconstruct, online, into a RAID 5 set. I know this is possible with OpenManage, but I has anyone figured out how to pull this off using the MegaCli tools? MegaRaid Software Guide Page 3-27 has what I think you’re looking for. MegaCli –LDRecon Note that I’ve never done this and I don’t think that it’s a particularly good idea. Make a backup [...]Continue Reading »
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