How to find out all available disks on RHEL?

Hello,
I notice that all sd device files are created under /dev/directory in advance.But I want to discover all actual available hard disk on my system and their status.I know I can get those information by using ioscan -fnCdisk on HP-UX and format on Solaris,then I can use insf on HP-UX and devfsadm on Solaris to create device special file.How can I do it on RedHat Enterprise Linux?
Thanks in advance,
Jianghuai

cat /proc/devices
cat /proc/partitionalso
dmesgor
less /var/log/dmesgmight be helpfull
create device special filePlase be more specific which special file do you mean.

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How to find out all available disks on RHEL?

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