Q

How does a LUN relate to notation CxTxDxSx?

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 ( LUN) 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 SCSI target (even for Fibre Channel) 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.
This was last published in September 2004

Dig Deeper on SAN management

PRO+

Content

Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchSolidStateStorage

SearchConvergedInfrastructure

SearchCloudStorage

SearchDisasterRecovery

SearchDataBackup

Close