Questions[megacli](server)

I'm fairly new to MegaCLI and I've been having this one issue, after running

megacli -CfgLdAdd -r1 [252:0,252:1,252:2,252:3,252:6,252:7] -a0

I get the error

Mix of configured and unconfigured drives are not possible. Exit Code: 0x0b

which upon a quick search shows to run the command

megacli -CfgForeign -Clear -a0

which returned this

There is no foreign configuration on controller 0. Exit Code: 0x00

My issue is that I can't configure the drives because megacli returns an error but all the info I could find says to do another command for foreign configs which aren't there.

Slight update/edit: Running command

megacli -CfgLdAdd -r0 [252:1] -a0

In an effort to just go drive by drive it returns

The specified physical disk does not have the appropriate attributes to complete the requested command. Exit Code: 0x26

Any help would be appreciated

We replaced a failed drive in Oracle Exalytics X4-4 machine. Failed drive was replaced fine and rebuild started. But when rebuild reached at 70%, the main disk got a bad sector and the rebuild failed. I tried rebuilding manually in megacli but it failed again. Oracle says that the RAID 1 volume has corrupted and the only option remains is to rebuild entire server. Server is still running and is in degraded mode. Is there any chance to survive from this situation? Can entire server rebuild be avoided? Need help....

I've got an LSI2208 integrated raid controller on a Supermicro X9DRH server board. It currently has a Logical Drive (LD) composed of 4 spinning disks. Now I want to add some more drives in JBOD, to let the OS access them directly (as opposed to creating a dedicated RAID0 LD per disk).

There are a couple of links (here for instance) explaining how to enable JBOD mode on LSI2208 controllers. This seems to be an all-or-nothing switch: either JBOD is supported on the controller, or not.

The command:

megacli -AdpSetProp EnableJBOD 1 -a0

... would enable JBOD mode on controller 0

From reading here, it seems that disks plugged into the controller but not associated with a Logical Disk become visible to the OS.

The question: is this a destructive operation? What happens to existing (RAID5/1/0) Logical Disk once this is done ? Or does this only affect disks not yet allocated to a Logical Disk ?

I could just try it out, but that means backing up several TB of data first.

Hope someone has an answer!

/opt/MegaCli -CfgDsply -a0 | less RAID Level : Primary-1, Secondary-3, RAID Level Qualifier-0

Almost positive this is not running a RAID3, my guess is a RAID 10, where "Primary" means what is being done in the "spans" (span being Mega Cli term for the first RAID operation blocks) and then the "RAID Level Qualifier" is the RAID level operation being done on top of the spans, and finally, "Secondary-3" means that there are 3 spans being RAID0'd across. This interpretation matches the disk space sanity checks, indeed the total capacity of the array is that of three physical drives. However, this interpretation and output syntax is convoluted to the point where a clarification is definitely needed.

I have a system where MegaCli64 -PdList -a0 shows media errors on one disk. After investigating the errors, I've decided not to take any action for now. I'd like to reset the error count, so that MegaCli will show 0 media errors unless there is another error. What arguments to MegaCLI do I need to do this?