How do I reconfigure my disk array on a Dell machine under Linux?
This is for CentOS 7, but similar actions can be performed on other Linux versions I'm sure (left as an exercise for the reader):
Put your new disk in the system (presuming it's hot-swappable. If not, you shouldn't be here).
Set up the Dell OMSA repo; create /etc/yum.repos.d/dell-omsa-repository.repo:
[dell-omsa-indep]
name=Dell OMSA repository - Hardware independent
type=rpm-md
mirrorlist=http://linux.dell.com/repo/hardware/latest/mirrors.cgi?osname=el$releasever&basearch=$basearch
&native=1&dellsysidpluginver=$dellsysidpluginver
gpgcheck=1
gpgkey=http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-dell
http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-libsmbios
enabled=1
failover=priority
bootstrapurl=http://linux.dell.com/repo/hardware/latest/bootstrap.cgi
[dell-omsa-specific] name=Dell OMSA repository - Hardware specific type=rpm-md mirrorlist=http://linux.dell.com/repo/hardware/latest/mirrors.cgi?osname=el$releasever&basearch=$basearch &native=1&sys_ven_id=$sys_ven_id&sys_dev_id=$sys_dev_id&dellsysidpluginver=$dellsysidpluginver gpgcheck=1 gpgkey=http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-dell http://linux.dell.com/repo/hardware/latest/RPM-GPG-KEY-libsmbios enabled=1 failover=priority bootstrapurl=http://linux.dell.com/repo/hardware/latest/bootstrap.cgi
Do: yum cleanall; yum make cache
Install the srvadmin-omacore package, and whatever packages it wants with it.
Study your system; again Your Mileage May Vary:
Show all controllers:
omreport storage controller
Show all Virtual (Logical) disks:
omreport storage vdisk
Show all physical disks on controller 0:
omreport storage pdisk controller=0
Show all logical disks on controller 0:
omreport storage vdisk controller=0
Show all physical disks on vdisk with ID 1:
omreport storage pdisk controller=0 vdisk=1
Now assuming your RAID (aka Virtual Disk) is on Controller 0, and assuming its ID is 1, and assuming your physical disks have IDs of 0:0:2 and 0:0:3, do this:
omconfig storage vdisk action=reconfigure controller=0 vdisk=1 raid=r1 pdisk=0:0:2,0:0:3
The process took over 24 hours for me, for 1TB 2.5" SAS drives. Much of that time, omreport continued to call the array "RAID0" until it had finished the reconfiguration. Then it had to make another housekeeping pass which took about an hour or two.