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how did they provide space? Did they create another LUN?
=> If yes, does you O/S already see the LUN?
=> Do you use multipathing? Is the dm/mapper device already visible?
=> Do you use ASMLib? Have you stamped the disk?
Last step then is to add the disk to the diskgroup (either with ASMCA or with sqlplus (alter diskgroup add disk <xyz>)
Thanks for you reply. Below is the answer of your Queries:
===>Yes ,they have added new lun and OS is able to see LUN.
===>Yes we are using multipathing. Yes DM/Mapper is already visible
===>Yes ,we use ASMLib,NO we have not stamped disk . Please let me know in detail what i need to do to add disk in my diskgroup and regarding asm stamping also.