SAN Storage in Linux

If I understand most of SAN hardware/software are owned by specific companies, such as EMC, NetApp, IBM, etc.... therefore the stated companies provide a GUI console for Administrators to configure and manage the storage,

I wonder, in which scenarios that an administrator needs to manually configure SAN through command line ?

Thank you
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I have had many situations where the required command is not available via the gui, also needed the cli to perform scripted activities like specific types of reporting without rolling out a dedicated management server.

The cli is usually more robust that the GUI.
Daniel HelgenbergerCommented:
I also most commonly use the cli - usually this has more features also. GlusterFS for instance has no GUI part and you can script stuff of course. Also, in case of StorNext form Quantum, you have the GUI only with a separate license.
Paul SolovyovskySenior IT AdvisorCommented:
I actually prefer a combination of CLI and GUI, for example if I'm deleting an single snapshot on the netapp I'll use gui but if I'm deleting thousands of snapshots I'll run through CLI.  Most vendors now also have powershell cmdlets so a combination of CLI, GUI, and Powershell is the best way to go for me since each has it's advantages and disadvantages.
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madunix (Fadi SODAH)Commented:
With IBM storage replication, I do both CLI and GUI, such as Replication monitoring via GUI/CLI
Another scenario is openSAN, or should I say a Linux system running SCST managed by scstadmin cli tool.

Very cheap way to run a SAN, but it works.

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