[Info-vax] Volume shadowing and current SCSI standards ?

[abrsvc]

On Friday, April 29, 2022 at 11:25:04 AM UTC-4, Phillip Helbig (undress to reply) wrote:
> In article <68f2137f-d0e6-4921... at googlegroups.com>,
> abrsvc <dansabr... at yahoo.com> writes: 
> 
> > The current HBS product requires the use of the READ/WRITE LONG commands 
> > so you are correct HBS won't work with devices that don't support it. 
> > Many customers now use SAN devices and the "shadowing" takes place there 
> > rather than being host based which avoids the issue. I have seen the 
> > shift with many of my clients to this "new" way. Yes HBS is valuable 
> > for many reasons, but there are alternatives that are increasingly being 
> > used today. While this should be addressed, I don't think it has the 
> > urgency that you incidate.
> Merely the fact that most don't expect such an essential feature to 
> break should be reason to address it. 
> 
> SAN? Yes, can provide help if a disk fails. But what about multi-site 
> clusters with members with physical connections to different nodes? 
> 
> And what about HBVS on hobbyist machines? :-)

I don't think you can state that HBVS breaks as the restriction exists today and has for quite some time.

I would guess that the restriction didn't raise a lot of reports with VSI which is one reason for it not being addressed (not addressed rather than fixed).

It might be an issue for hobbyists, but lets get real, the main focus will be for paying customers.

Dan