[Info-vax] RAID vs. MOUNT/BIND

[VAXman- at SendSpamHere.ORG]

In article <ic5cik$f3i$3 at online.de>, helbig at astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) writes:
>In article
><3843bded-c68a-4d35-9b79-749ff1b8547a at v19g2000yqa.googlegroups.com>,
>onedbguru <onedbguru at yahoo.com> writes: 
>
>> I had a customer with an RMS indexed file that was > 40GB using RA90
>> (1.2GB),RA72(1.0GB) type of disks  in bound volume sets on an 8000-
>> class system (maybe an 8600???)
>
>How many disks can be in a volume set?

The file ID (3 words) limits this to 255:

{FID$W_NUM},{FID$W_SEQ},{FID$B_NMX at 8!FID$B_RVN}

RVN is the relative volume number.  When 0, it's a typical mounted volume.
When it is non-zero, it represents a volume number in the bound volume set. 
This can be a value of 1 to 255.  (ie. it's an unsigned byte)  I've never
seen a volume set with 255 volumes but I'm sure that somebody, somewhere,
must have tested this close to or at its limits.


-- 
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

All your spirit rack abuses, come to haunt you back by day.
All your Byzantine excuses, given time, given you away.