In a Unix environment, how does a LUN relate to the controller naming convention of CxTxDxSx?
While it can vary depending on Unix implementation, typically the notation CxTxDxSx refers to controller or channel path from the server (the HBA), target address of the device, device sub-address (
) and, on some systems, the slice or partition on the disk. So, for example, C0T0D1S4 would represent the HBA identified with an address of 0, a
target (even for
) of 0, LUN 1, and Unix slice or partition number 4. Note that a LUN or storage device that is multi-pathed could have multiple addresses pointing to the same LUN. If a server has two HBAs, one being C0 and the other being C1, and a LUN on a storage device that is accessible via a dual controller RAID array with SCSI targets T0 and T1, then the following addresses point to the same LUN: C0T0D1S4, C0T1D1S4, C1T0D1S4 and C1T1D1S4.
Dig deeper on SAN management
Independent storage expert Greg Schulz discusses how to perform replication when using cloud storage as a target.continue reading
Independent storage expert Greg Schulz offers insight on how replication is used for remote site backup in this Expert Response.continue reading
Independent storage expert Greg Schulz discusses how CDP, snapshot and remote data replication are used for disaster recovery.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.