The man who receives five thousand dollars a year wants six thousand dollars a year, and the man who owns eight or nine hundred thousand dollars will want a hundred thousand dollars more to make it a million, while the man who has his millions will want everything he can lay his hands on and then raise his voice against the poor devil who wants ten cents more a day. (Samuel Gompers)
This article is from a FAQ concerning SCO operating
systems. While some of the information may be applicable to any OS,
or any Unix or Linux OS, it may be specific to SCO Xenix, Open
There is lots of Linux, Mac OS X and general Unix info elsewhere on
this site: Search this site is the best
way to find anything.
Unless you are moving to a RAID-5 config from a single disk, you
can do this without wiping out and restoring data.
However, you should ALWAYS have good backups prior to something
as drastic as this.
The first step is to be sure the current drive geometry has been
recorded on the drive. Ordinarily, your SCSI BIOS decides what the
geometry should be, and that's the problem: the BIOS on the new
controller may have a different concept of geometry and if it does,
you will not be able to boot. However, if the drive has been
"stamped" with a particular geometry, the new controller will
respect and use those settings.
Check the geometry. You can see it in "hwconfig", and "dparam"
will also tell you what it is. For example,
# dparam /dev/rhd00
2213 255 0 0 0 0 0 63
That's a drive with 2213 cylinders, 255 heads, and 63 sectors
per track. The middle five 0's refer to wrt_reduce, precomp, ecc
and controller type and landing zone (it's common for those to be
zero on modern drives)