There are two hard disks on my machine, but after installing the operating system, it uses only one hard disk to build RAID0.
After installing MegaCLI, I used:
MegaCli64 -pdlist -aALL to display the RAID configuration. I found one disk's "Firmware state" is online, but the other's is unconfigured.
Does that mean I need to add the unconfigured disk to the RAID array? How do I add it?
Before yesterday, I had no idea about RAID. Can someone advise me?
So first of all to see the disks behind a LSI RAID controller you can use storcli tool or megacli.
I would suggest to use storcli that is more user friendly and which you can download from he LSI website. This is the tool that I describe below.
URL to download storcli : Storcli Tool
Intro:
/cx Controller specific commands /ex Enclosure specific commands /sx Slot/PD specific commands /vx Virtual drive specific commands /dx Disk group specific commands To see controller information :
sudo storcli /cX show all To see the disk information
sudo storcli /cX/eX/sX show all To create a RAID 1 :
sudo storcli /cx add vd type=r1 drives=[EnclosureID:SlotID] URL to the reference manual of Storcli Tool : Manual in PDF format
megacli or storcli to create single-disk RAIDs, as I mentioned in my other answer, but if your controller is compatible with the IT mode hack, I'd do it that way instead. That seems is more in line with your actual goal, which is to treat this RAID controller as a raw-disk SCSI controller. You don't use either of these tools to re-flash your firmware. The problem is solved now.And Edouard Fazenda's method is right,but there is one step before adding a new virtual drive.In my case,when I used the command:
storcli64 show all or
MegaCli64 -CfgForeign -Scan -a0
I found that the other hard disk's DG(DriveGroup) is foreign.I think that why I cann't use that hard disk to add a new virtual drive.So the first work is clearing it by the following commond:
MegaCli64 -CfgForeign -Clear -a0
After that,we can use the hard disk to add a new virtual drive by the following commond:
MegaCli64 -CfgLdAdd r0[EnclosureID:SlotID] -a0 or storcli64 /c0 add vd type=r0 drives=EnclosureID:SlotID
Now we can find sd[a|b|c...] directories in /etc,and we can use the hard disk normally.
There is also some informations about this problem: [https://serverfault.com/questions/331807/megacli-is-killing-me-any-help-appreciated]
In the end,I want to say thank you to @Warren Young and @Edouard Fazenda for giving so many clues to me.
