09-24-2007
The method that I use to accomplish a bit-by-bit copy of a SCO Openserver 5.0.7 SCSI disk is this:
First, create a small (say, 30 MB) DOS_16 partition on an empty disk. I found that Free Fdisk works great on large SCSI disks. Then format this partition from a bootable DOS floppy (I used MS_DOS ver 6.22); make the new DOS partition bootable by using the DOS "FORMAT C: /S" command. Copy the freeware version of Ranish Partition Manager (for DOS; I use version 2.40.00) to a new directory on this new DOS partition, as well as any other DOS utilities that suit you.
Next, proceed with a fresh install of SCO Openserver, and tell its install routine that you wish to keep the DOS_16 partition intact at the front of the disk, and use the remainder for Unix (and whatever else you wish).
Once SCO Openserver is installed, restart the PC and at the boot manager's "boot:" prompt, enter "dos" (no quotation marks), which will boot DOS from the DOS partition. Run Ranish Partition Manager, and use its D command to copy the entire disk to a second disk. (Play with the program first, to see how versatile and powerful it is. It can copy individual partitions, or an entire disk . . . and it's free.) It works nicely, and is fast, especially if you use EMM386, switch the processor to protected mode, and use DMPI before running Ranish. A 9 GB disk copy takes me less than 10 minutes.
I've used this method to clone a Unix disk a couple times after screwing up my SCO installation and it saves hours of install time.
Last edited by Russ Bellew; 10-03-2007 at 06:24 PM..
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SD(4) Linux Programmer's Manual SD(4)
NAME
sd - driver for SCSI disk drives
SYNOPSIS
#include <linux/hdreg.h> /* for HDIO_GETGEO */
#include <linux/fs.h> /* for BLKGETSIZE and BLKRRPART */
CONFIGURATION
The block device name has the following form: sdlp, where l is a letter denoting the physical drive, and p is a number denoting the parti-
tion on that physical drive. Often, the partition number, p, will be left off when the device corresponds to the whole drive.
SCSI disks have a major device number of 8, and a minor device number of the form (16 * drive_number) + partition_number, where drive_num-
ber is the number of the physical drive in order of detection, and partition_number is as follows:
partition 0 is the whole drive
partitions 1-4 are the DOS "primary" partitions
partitions 5-8 are the DOS "extended" (or "logical") partitions
For example, /dev/sda will have major 8, minor 0, and will refer to all of the first SCSI drive in the system; and /dev/sdb3 will have
major 8, minor 19, and will refer to the third DOS "primary" partition on the second SCSI drive in the system.
At this time, only block devices are provided. Raw devices have not yet been implemented.
DESCRIPTION
The following ioctls are provided:
HDIO_GETGEO
Returns the BIOS disk parameters in the following structure:
struct hd_geometry {
unsigned char heads;
unsigned char sectors;
unsigned short cylinders;
unsigned long start;
};
A pointer to this structure is passed as the ioctl(2) parameter.
The information returned in the parameter is the disk geometry of the drive as understood by DOS! This geometry is not the physical
geometry of the drive. It is used when constructing the drive's partition table, however, and is needed for convenient operation of
fdisk(1), efdisk(1), and lilo(1). If the geometry information is not available, zero will be returned for all of the parameters.
BLKGETSIZE
Returns the device size in sectors. The ioctl(2) parameter should be a pointer to a long.
BLKRRPART
Forces a reread of the SCSI disk partition tables. No parameter is needed.
The SCSI ioctl(2) operations are also supported. If the ioctl(2) parameter is required, and it is NULL, then ioctl(2) will fail
with the error EINVAL.
FILES
/dev/sd[a-h]: the whole device
/dev/sd[a-h][0-8]: individual block partitions
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-05-03 SD(4)