Hi, VDC.
You need to put hdisk1 in a "volume group" (a set of disks") , create a filesystem inside this volume group, and mount the filesystem.
Type the following
smit vg
choose "add a volume group"
choose hdisk1
choose a name for your volume group
accept everyghing else, and then type
lspv # in order to see that hdisk1 is available as part of a volume group. Then
smit fs
choose add a filesystem
choose your volume group name
choose the filesystem size, mount point, etc.
accept everything else
Then, type
mount -a
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