dump on old 1.2 Ultrix...

[George Robbins]

In article <1226 at gvgpsa.GVG.TEK.COM> davew at gvgpsa.gvg.tek.com (David C. White) writes:
> In article <412 at wuee1.wustl.edu> tjs at wuee1.wustl.edu.UUCP (tom sullivan) writes:
> >my biggest complaint with 1.2 is the speed (or lack there of) of
> >dumps. is there an optimal setting (density, lenght, blocking factor, etc.)
> >to do dumps onto a TK50 drive. as it is, it takes over 6 hours to perform
> >a level 0 dump of an 80 Meg partition.
> 
> I think you are out of luck.  If my memory serves me correctly, the
> driver was rewritten to drive the TK50 in streaming mode in 2.0.
> The driver in 1.X couldn't get data to the drive fast enough to
> keep it going in streaming mode, so it runs in start/stop mode
> which explains why it takes so long to do a small dump.  

Maybe one of the DEC folk could clarify this? 

> It may be possible to grab the driver out of the 3.0 you seem to
> imply that you have, but I haven't really looked into whether
> this is possible or not.  Another possiblilty to to see if you
> can find a way to get a 2.3 version if you really don't want the
> 3.0 features.

Drivers are generally not binary transportable across major releases and the
3.0 stuff especially, since kernel level memory allocation stuff changed.

-- 
George Robbins - now working for,	uucp: {uunet|pyramid|rutgers}!cbmvax!grr
but no way officially representing	arpa: cbmvax!grr at uunet.uu.net
Commodore, Engineering Department	fone: 215-431-9255 (only by moonlite)