Seconde SCSI disk in Ubuntu not identified

[baddou_99]

I installed The Ubuntu OS on HP Proliant DL380 containing two scsi disk, the first disk (Contain the OS) was identified the second not identified
Any suggestion please to mount it
Thanks

[JKytsi]

What is your RAID configuration ? The OS won't see the second disk if You have RAID1 configured (which is default with two disks).

[baddou_99]

I have RAID1+0

[baddou_99]

Thanks a lot Jarkko, I think that the problem is what you clarified

[baddou_99]

Now i know that HP proliant by default select Raid 1+0, two disks installed in use