[TD - LINUX] How to change max lun value (For Emulex)

 

[TD-LINUX] How to change default max lun(for emulex).docx

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How to change max lun value (For Emulex)

 

Emulex's max lun value is 255.

If you do expand 255 over, you will get the following error in / var / log / message.

 

 

 

 

 

Now Lun value is  256  is max value

step 1 : check  ipfc_max_luns value ( now 255)

 

Step 2: add scsi_mod.max_luns=32768 scsi_mod.max_report_luns=32768

# grub-makconfig –o /boot/grub2.cfg   or   

# grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg   (if use efi)

 

Step 3: make a file /etc/modprobe.d/lpfc.conf and

 Add options lpfx ipfc_max_luns=32768

Step 4: add fs.inotify.max_user_watches=16384

 

Step 5: reboot

 

 Step 6: check lpfc_max_luns value

 

If  qlogic  , no need any aother setup because qlogic max lun value is 65535