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Linux Stop Flushing of mmaped Pages To Disk

How can I stop the flushing of mmaped pages to disk in Linux?
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Linux Find FC ID (WWN) of a disk/LUN

How do I find the FC ID (WWN) of a disk/LUN on Linux server?
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Q. After windows XP installation I lost my Grub boot loader and now when I try to run grub-install command to restore Grub in master boot record. But I am getting an error that read as follows:
/dev/sda does not have any corresponding BIOS drive

How do I fix this problem?

A. grub-install is use to install GRUB on your drive. If you are getting error try to recheck device map.

Type the command as follows:
# grub-install --recheck /dev/sdaWhere,

  • --recheck: Probe a device map even if it already exists
  • /dev/sda : Replace /dev/sda with your actual device name.

Above command should fix the problem.

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