[Info-vax] RAID vs. MOUNT/BIND

[Phillip Helbig---undress to reply]

In article <4ce3ed4c$0$17369$c3e8da3$b280bf18 at news.astraweb.com>, JF
Mezei <jfmezei.spamnot at vaxination.ca> writes: 

> Phillip Helbig---undress to reply wrote:
> 
> >      $ MOUNT/BIND=TEST3013 DSA3011/SHADOW=($1$DUA402:,$1$DUA403:),
> >      DSA3012/SHADOW=($1$DUA404:,$1$DUA405:) TEST3011,TEST3012 TEST3013
> 
> I was warned against mount/bind, but I used it to create a large enough
> disk based on DSSI drives to emulate a single larger SCSI disk I had on
> the Microvax II. I went ahead anyways. Whay could possibly go wrong ?
> 
> LD driver went wrong, and when creating on large file, instead of
> writing to the blocks on the right physical disk, it overwrote data on
> the first physical disk of the set. I lost a lot of data and time
> because of this.
> 
> While LDdriver has since been fixed, I am rather weary of MIUNT/BIND
> because I suspect there may be more utilities that were written without
> any thought about multi volume disks.
> 
> If you go ahead with it, make sure you get the latest LDdriver, not the
> one that comes with VMS.

Naïve question here: what is LDDRIVER and why would I need it?