Subject: Re: Another changer, another changer problem
To: NetBSD-current Discussion List <>
From: John Nemeth <>
List: current-users
Date: 10/03/1998 14:06:26
On Oct 1,  9:26pm, Greg A. Woods wrote:
} [ On Thu, October 1, 1998 at 18:02:04 (-0700), C Kane wrote: ]
} > The fixed disks are c0t5d0 and c0t6d0, and c1t2d0 is a SCSI floppy.
} > This is a different naming scheme than AT&T mentioned earlier.
} > The nibbles seem to be cct??b where cc is controller, t is target,
} > and b are control bits (I've seen them used only for tapes to indicate
} > no-rewind, for example).  I'm not sure if the "d0" corresponds to one
} > or two nibbles -- never seen it used.  HP seems to use 24 bits for the
} > minor number.
} The AT&T naming scheme (c0t0d0s0) uses the "d0" as the LUN, and "s0" as
} the slice (or partition) number allowing for logical partitioning of
} physical drives just as the final letter of "sd0a" indicates the
} partition number.  Doe HP-UX not have such logical partitioning?

     No.  The only way to split up a disk as of HP-UX 10.0 is to use
LVM (the Logical Volume Manager).  This is one of those fancy schemes
that allows you to resize "partitions" on the fly, split them across
spindles, etc. similar to what AIX does.  It is nice, but it can also
be a pain in the neck if you don't need it, since it is fairly complex
to administrate, compared to the conventional way of doing things.

}-- End of excerpt from Greg A. Woods