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Operating Systems SCO Backup/RAID of HD on Old UNIX Server Post 302956599 by chrishouse on Thursday 1st of October 2015 09:34:13 AM
Old 10-01-2015
Quote:
Originally Posted by hicksd8
Okay, I get the picture.

Do you have the install media for this O/S?

Does the machine have a floppy drive (that works)?
If so, you can make what is known as a "root & boot" set which will facilitate you getting the machine back on its feet if you have a full tape backup.

To create the "root & boot" floppies login as root and run:

Code:
# mkdev fd

which will give you a menu driven interface. Select the options to write out the emergency floppies.

To make a full tape backup capable of disaster recovery you should use cpio NOT tar. (The reason is that tar doesn't backup/restore the device nodes properly in /dev).

Typically:

Code:
 
 # cd /
 # find . -depth -print|cpio -ov -C10240 -K<tape size in K's> /dev/rct0

Yes, you can leave out the -C switch out but it is more efficient to write 10K blocks to tape. The -K should specify the capacity of each tape so that it calls for the next tape if needed. You should also use the -c switch if you want to write in 'portable' format such as knowing you are going to change platforms.

With a 'root & boot' set you can boot from floppy which contains all the commands needed for recovery, the required boot block copies, etc. So you can use the 'divvy' command to lay out a new hard drive and create the filesystems. The 'dd' command to write out boot blocks 0 and 1.
You can then mount your new empty hard disk root filesystem and restore the whole from tape. Also, restore any non-root filesystems.

That is broadly it. Feel free to ask further questions.

There is better SCO knowledge on this forum than mine so, down the line, you might ask moderators to move this thread to the SCO forum proper where it will be more likely to be seen by the right people.

Hope that helps.
They are still looking for the install media. They should have it, but the company that did the turnkey setup and initial support may have kept it or it may have been lost.

I think it does have a floppy and your solution sounds good and makes sense to me. I think in terms of DOS, it sounds like the floppy is kind of doing what the old dos format c:/s command did? Then, I am just copying files?

I am sure I am over simplifying, if not totally wrong above, but it at least now I know one way to do it.

---------- Post updated at 08:04 AM ---------- Previous update was at 07:54 AM ----------

Quote:
Originally Posted by jgt
You used the word RAID in your subject line, but since you only speak of one disk in the post itself, I am going to assume that you have a single SCSI disk.
Here are some approaches you might take.
1. Corner the market for 9,18,and 33gb scsi disks. You can use disk duplication programs like hdclone to make a copy of your current disk, although you will not be able to change the logical size of the disk. That is, if you copy your 9gb disk to a 33gb disk, when you install the 33gb disk it will still appear to be 9. Put several of these on the shelf, and if the disk fails, install a replacement, and restore the latest tape. Cost 100-200$US per disk.

2. Toss the tape drive, and install a DVD writer. Purchase Microlite Edge, and do backups of the entire system to dvd. This software also allows you to create a bootable cd/dvd with a menu driven restore procedure. Cost 600US$

3. Upgrade the entire system to a new I3 processor with 4gb memory and 32gb SSD with DVD and backup to either USB or DVD and SCO 6.0.0. Cost less than 5k (hardware, software and installation.)
I only have one disk, but I will put another in, SCSI or IDE or USB as needed.

Right now, I am afraid my Application Software stops me from upgrading. I do not really understand it, but they told me the copy protection in it was tied to the compiler and the compiler to my version of Unix and I would not be able to simply install the software on another machine/hd. That really does not make sense to me, but that is what I understood them to say.

Though it has been upgraded several times, last about 10 or more years ago, our original license is over 20 years old. A complete new system for us is over $20k, probably over $30k, that is why I need to backup what I have.

There are plenty of E800 servers out there and I have already moved this HD once to a new server, right now my critical link is the HD, O/S and APP. (I have the data backed up.)

---------- Post updated at 08:34 AM ---------- Previous update was at 08:04 AM ----------

Quote:
Originally Posted by edfair
Along with the above it might be good to have an idea of how the hard disk is arranged. Accomplished with
Code:
divvy /dev/harddiskname

. Also would help to know what accounting program or how it is set up as some go into the /usr or /usr2 areas with all the programs and data there and transferring to a new machine a matter of copying that across.
Last part first. Using Open Systems Inc. Accounting Software for Electric Motor Shops. I think it is a standard commercial accounting package they modify for specific industries, but could say that 100%.

My Data is in a directory off the root called /u. The application is there as well, just not sure if 100% is there, but I can find where all its parts are if needed. I have backed up the /u directory to a windows box using ftp.

Here is the Divvy command without parameters. Let me know if you need it with the specific HD parameter (I am afraid to start typing in parameters for fear of messing up something, but I will if I need to do so)

# divvy
+-------------------+------------+--------+---+-------------+------------+
| Name | Type | New FS | # | First Block | Last Block |
+-------------------+------------+--------+---+-------------+------------+
| boot | EAFS | no | 0 | 0| 15359|
| swap | NON FS | no | 1 | 15360| 277503|
| root | HTFS | no | 2 | 277504| 1534975|
| u | HTFS | no | 3 | 1534976| 5723165|
| u1 | HTFS | no | 4 | 5723166| 8867869|
| | NOT USED | no | 5 | -| -|
| recover | NON FS | no | 6 | 8867870| 8867879|
| hd0a | WHOLE DISK | no | 7 | 0| 8875880|
+-------------------+------------+--------+---+-------------+------------+
8867880 1K blocks for divisions, 8001 1K blocks reserved for the system
 

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