update from True64 5.1 to 5.1B

[WilliamSmith11]

Hi I am planning to do an update from true64 5.1 to 5.1B ,
My question is ,
If something go wrong I can do an update in reverse mode, from 5.1BH to 5.1?

using the same procedure as from 5.1 to 5.1B?


W.S

[Steven Schweda]

I believe that the downgrade procedure
usually involves using [v]dump and
[v]restore.

[Srinath_3]

Instead you can take the entire image of the system on to a tape using btcreate.

Then if something goes wrong while upgrading from 5.1b to 5.1 you can still extract the entire image from the tape on to the system.

For more info read man btcreate and man btextract.

[Vladimir Fabecic]

Hello William
There is no "reverse mode". There is no procedure for downgrading OS.
The only way to do it is to restore backup.
Anyway, you have always to do backup before touching anything in OS.
You can do btcreate and vdump of / , /usr and /var.

[Ivan Ferreira]

You cannot downgrade your system. As described above, use vdump to create a full backup, for example:

vdump -0uf /dev/tape/tape0c /
vdump -0uf /dev/tape/tape0c /usr
vdump -0uf /dev/tape/tape0c /var

Ensure that you meet all the pre-requisites before the upgrade, and the upgrade should run without problems.