I have a Dell T410 server with a RAID (Perc) card on it and 3 disks of 500GB. When I boot the server, I can see the configuration as Raid 5. But when I try to install Ubuntu 10.04 LTS, I always see the 3 disks. I expected Ubuntu to see only one disk of 1TB
PERC S100 is a Software RAID Card, Guide -> http://dell.to/LZGgsH, as you can see on the page 15 all the supported operating systems are Windows, there is no option to install Linux.
So, or you change your card or you do a Software RAID inside the OS.
According to Ubuntu on Dell it should be possible to use the PERC5 using the megaraid_sas driver.
The driver for it should be located in
This site has quite some information on using a PERC5 with GNU/linux. I am not going to cut and paste it all. It seems that the driver provides access both to the raw disks (please ignore those) and virtual drives formed from the array. Both of them should be listed via
Short version: Can you boot Ubuntu, open a new shell and try these commands:
If it shows the output below then you have a working and recognise RAID array with the name
a0d0. You should be able to install to it.
a0 PERC 5/i Integrated a0d0 1024GiB RAID 5 1x3 optimal a0e8s0 500GiB a0d0 online a0e8s1 500GiB a0d0 online a0e8s2 500GiB a0d1 online
If that fails:
lsmod(Shows loaded kernel modules) - We are looking for megaraid_sas
- If not present, modprobe megaraid_sas
- If not found, put it on a floppy (or I guess these days on anything which mounts. Maybe a USB pendrive?)
Then try the megasasctl command again.
- If the command is not on the Ubuntu installer disc then you might need to look for a static version of it. Or boot a liveCD which has the command.