Configuring HP-UX For Peripherals

Chapter 5 139
Configuring Disk Drives, Disk Arrays, and CD-ROM Drives
Planning to Configure a Disk Drive
configuration tools.
Consult the hardware documentation to find out what degree of data
protection is provided by the RAID level in which the disk array is
shipped. If you need to modify the RAID level, use the disk array utilities
provided.
If you are configuring a disk array with more than one controller, you
will be using more than one target address. Be sure you choose a SCSI
interface with sufficient bus addresses available.
Do not attempt to use disk space larger than 4GB without apportioning
the space with LVM. HP-UX cannot address disk space in excess of 4GB;
any remaining disk space would be unusable. Given this maximum-size
limitation, hard partitions will work. Similarly, boot, dump, or primary
swap cannot be greater than 2GB.
You can use Logical Volume Manager (LVM) to partition disk arrays into
logical volumes, manage mirrored file systems, and deal with file
systems on disk arrays in independentmode. See Managing Systems and
Workgroups for documentation on configuring and managing file systems
on LVM.
Take care to terminate all busses. Keep cabling (including internal SCSI
cabling) to within recommended bounds.
Considerations for Configuring a CD-ROM Drive
CD-ROM drives are configured like a standard disk using SAM or
command-line interface, but because CD-ROMs hold read-only file
systems,
• You cannot use a CD-ROM for swap space.
• Users cannot create a new file system on a CD-ROM disk.
Considerations for Configuring a Floppy Disk Drive
Floppy disk drives are installed as internal devices on some HP-UX
systems. You might need to configure the device drivers into the system
for HP-UX to be able to communicate with the media. (See floppy (7) in
the HP-UX Reference and “Floppy Disk Drive Configuration Guidelines”
later in this chapter for device driver information.)
• Floppy disks are not supported as boot disks.