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From: system@SendSpamHere.ORG (Brian Schenkenberger, VAXman-)
Newsgroups: comp.os.vms
Subject: Re: CD burners for OpenVMS Alpha?
Date: Thu, 20 Jan 2000 22:23:46 GMT
Organization: TMESIS Software
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In article <009E46E7.BE818B30@SendSpamHere.ORG>, system@SendSpamHere.ORG (Brian Schenkenberger, VAXman-) writes:
>In article <3887212C.3A9161A5@advocatehealth.com>, djesys <David.Dachtera@advocatehealth.com> writes:
>>"Brian Schenkenberger, VAXman-" wrote:
>>> 
>>[snip]
>>> Also, if you know what you're doing, you can use alternate roots which
>>> can be selected from the console via boot command flags to alter and to
>>> boot different VMS versions. [snip]
>>
>>???
>>How you do dat??
>>
>>How would you get the boot block to point to a different version's
>>VMB/APB at boot time? How are all the kernel bits sought?
>
>Who says you need independent VMBs/APBs???  Read the OpenVMS I&DS, 
>specifically, chapters which describe the bootstrapping of OpenVMS.
>
>
>Here's a simple installation scenario for you to follow on Alpha for 
>installing both V7.2 and V7.2-1 on the same device.
>
>Assume a new disk capable of holding the two copies of VMS.  
>
>Place the distribution in the CD-ROM dirve and boot VMS from the CD.
>
>Install OpenVMS V7.2
>
>Boot the newly installed V7.2.
>
>Rename [000000]VMS$COMMON.DIR to [000000]VMS_V72$COMMON.DIR
>Rename [000000]SYS0.DIR       to [000000]SYS20.DIR

Be sure to rename [000000]SYS0.DIR first!

>At this point, you will have to HALT the system as it will not be able to
>find SYS$SYSTEM:SHUTDOWN.COM.
>
>Now, to boot OpenVMS V7.2 from this drive, enter:
>
>>>> B -FL 20,0 <device>
>
>
>Now, it's time to install the OpenVMS V7.2-1.
>
>Put the V7.2-1 distribution into the CD-ROM and boot from the CD.
>
>Install V7.2-1 to the same device.  Be sure to [PRESERVE] not [INITIALIZE]
>the device.
>
>The installation will complain that [SYS20]SYSCOMMON.DIR is not an alias
>of [000000]VMS$COMMON.DIR.  Continue with the installation anyway.
>
>Boot the newly installed V7.2-1.
>
>Rename [000000]VMS$COMMON.DIR to [000000]VMS_V721$COMMON.DIR
>Rename [000000]SYS0.DIR       to [000000]SYS21.DIR

Be sure to rename [000000]SYS0.DIR first!

>At this point, you will have to HALT the system as it will not be able to
>find SYS$SYSTEM:SHUTDOWN.COM.
>
>Now, to boot OpenVMS V7.2-1 from this drive, enter:
>
>>>> B -FL 21,0 <device>
>
>
>The same can be accomplished on the VAX side.  I'll leave this as an 
>exercise for the reader.

--
VAXman- OpenVMS APE certification number: AAA-0001           VAXman@TMESIS.COM