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I have inserted one new 600 GB HDD to my Linux server. Green light is glowing but in my Oracle Enterprise Linux 5.5 OS it is not showing after executing the command below:
If this is how-swappable hardware, you still need to issue a scsi-rescan. You can do this from the command line directly ,or have a script do it for you.
fdisk -l
will show the drive even if it doesn't have a partition table (it will tell you it couldn't find a partition table).