Just make sure you use the v/p usl file on v/p systems and the v/e usl on v/ e systems to avoid system failures...

Sent from my iPhone

> On Mar 21, 2021, at 12:28 AM, Frank McConnell <[log in to unmask]> wrote:
> 
> On Mar 20, 2021, at 19:33, Gary Robillard wrote:
>> 30539B was the series 39 disk caching product....
>> See page 31 in the system configuration manual (manual page 1-20)
> 
> I think 30539B was the number for the disc caching product on all series.
> I am seeing it on a Release 23 SUBSYS tape cut for a Series 58.
> 
> 000037d0  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
> 000037e0  20 20 20 20 20 20 20 20  20 20 20 20 50 52 33 30  |            PR30|
> 000037f0  35 33 39 42 20 20 20 20  20 20 20 20 20 20 20 20  |539B            |
> 00003800  44 49 53 43 20 43 41 43  48 45 2f 33 30 30 30 20  |DISC CACHE/3000 |
> (three rows elided because they contain customer-identifying info)
> 00003840  20 48 50 33 30 35 33 39  20 20 20 20 20 20 20 20  | HP30539        |
> 00003850  20 20 20 20 20 20 20 20  20 20 20 20 20 20 20 20  |                |
> 
> HP didn’t want disc caching on 3000s with too little main memory, including 
> the Series 37.  Can’t remember what “too little” was but I think 2MB (1MW) was
> too little (max supported memory for Series III and Series 37 I think).  Old
> rumor was that disc caching was developed under MPE IV on a Series III but 
> HP didn’t want to support it on that, thus the requirement for MPE V/P (which 
> really was not that different from MPE IV) or MPE V/E.
> 
> -Frank McConnell
> 

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