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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WREN(3) Library Functions Manual WREN(3)
NAME
wren, ata - hard disk interface
SYNOPSIS
bind #H[drive] /dev
bind #w[target[.lun]] /dev
/dev/hd0disk
/dev/hd0partition
/dev/sd0disk
/dev/sd0partition
...
DESCRIPTION
The hard disk interfaces (wren, #w, is a SCSI disk; ata, #H, is an IDE or ATA disk) serve a one-level directory giving access to the hard
disk partitions. The parameter to attach defines the numerical SCSI target and logical unit number or the IDE drive number to access.
Both default to zero.
Each partition name is prefixed by hd and the numeric drive identifier. The partition always exists and covers the entire disk. The size
of each partition as reported by stat(2) is the number of bytes in the partition, so the size of is the size of the entire disk.
The partition also always exists; it is the last block on the disk for SCSI, second to last for IDE. If it contains valid partition data,
those partitions will be visible as well. Every time the device is bound, the partitions are updated to reflect any changes in the parti-
tion file.
The format of the partition file is the string
plan9 partitions
on a line, followed by partition specifications, one per line, consisting of a name and textual strings for the block start and limit for
each partition on the disk.
The program prep(8) writes the partition table for the disk; its use is preferred to writing it by hand.
SEE ALSO
prep(8), scsi(3)
SOURCE
/sys/src/9/port/devwren.c
/sys/src/9/pc/devata.c
WREN(3)