Re: Wonderful things happen to an OS when it has an internal champion

In article <mgrSwFZrNz+T@xxxxxxxxxxxxxxxxxxxxxxxx>,
Kilgallen@xxxxxxxxxxx (Larry Kilgallen) wrote:

Many of us have more faith in the host based shadowing of VMS, in some
cases because we have met the developers, in some cases because of
stability over the years, in some cases because we know it has not
been polluted by the needs of some other operating system, and no
doubt in some cases because of other reasons that do not occur to me.

One major reason that occurs to me is the ability to see the status of a
shadow set member from VMS, without resorting to unsupported utilities
to interrogate the disk controller (*bad* memories of SWCC becoming the
only officially supported way to do that).

HBVS can also be used to clone disks and as part of your backup
strategy, for example backup up one shadow member to the other to
defragment it, following that with a shadow copy from the "new" to the
"old".

I understand there are VMS systems with that kind of reliability too. What
impresses me is that the reliability is not so much because of the
hardware,
but because of the OS.

The reliability is also due to the fact that the OS only runs on
certain hardware rather than anything-you-throw-together-as-a-PC.
That is the reason those people calling for porting VMS to X86
architecture don't have a universal appeal.

Having tried in the past to order PCs which are *exactly* the same, you
often don't get that when you are talking large numbers.

--
Paul Sture

Sue's OpenVMS bookmarks:
http://eisner.encompasserve.org/~sture/ovms-bookmarks.html
.

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