I understand that a storage LUN or group of LUNs is externally mapped to a specific volume that in turn gets mapped to an OS specific file system on an FC-attached host.
2. If the storage RAID controller exposes the file systems, what is the role of HBA?
The HBA primarily performs connection-level functions that transmit data. The RAID controller does not export a file system, it exports a storage address space. Sometimes this is called a volume, sometimes it's called a virtual disk. Whatever it is called, it is the thing that a file system places data into. The file system manages how the space is used and reused. The HBA is also responsible for providing all other data about the node to the SAN switch it is connected to. The HBA is the network citizen on behalf of the node, whether it is a system or storage subsystem. Regards,
Editor's note: Do you agree with this expert's response? If you have more to share, post it in one of our .bphAaR2qhqA^0@/searchstorage>discussion forums.
Dig deeper on SAN management
Related Q&A from Marc Farley
Mark Farley discusses the difference between iFCP and FCIP.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.