HW Raid and HBA on same backplane


Renowned Member
Feb 19, 2014
On an eight disk backplane, two sas 8087 connectors, I've currently got one sas cable plugged into onboard hardware raid and one port plugged into a 9211 HBA, does anyone see any problem with this? I did it without thinking but wondered if it may cause an issue in the future?

backplane with multiplexer somtimes make problem and not recommended with ceph or zfs.
But without know the exact HW of your System, I would say there will no problems with this setup.
Wolfgang thanks. By multiplexer do you mean SAS expander? If so no, there isn't one.

Its an IBM x3650 M4. On the HW raid controller I just wanted to be able to mirror the OS with two drives and with the 4 on the HBA its 4 x SM863a 960GB for ceph which I think I will wait to implement when the new ceph is stable, in the meantime using iscsi SAN.


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