Re: disk cache battery story

On 2/28/06, Larry Bolhuis <lbolhuis@xxxxxxxxxx> wrote:
> It needs to charge the battery long enough to trust the bugger!! This
> would be normal.

that makes sense.  I would not have thought the system charges the
battery as well as drawing on it.

I am curious when the disk controller cache was first used on the
as400.  The single level store seems to benefit greatly from having
the disk cache. Assuming the s/38 did not have it, how could that
system have performed as well as it did without a cache?

-Steve



>
> Same battery from Batteries Plus is about $15.
>
>  - Larry
>
> Steve Richter wrote:
> > I had to replace the battery on the disk controller of my 170 today.
> > After the battery died on thursday I did a bunch of compiles to
> > measure how slow the system had gotten. Compiles were taking 20
> > seconds each.
> >
> > Part number 91H3968. $75!!
> >
> > It was easy to replace the battery pack. Pull the card from the PCI
> > slot on the 170. ( is that the PowerPC CPU on that same card?  It has
> > powerPC printed on it, but does not appear very big. ).  Upen the cage
> > the battery is in, snap in the new battery, put the card back in its
> > slot.
> >
> > Funny thing is after IPLing the system the error message was gone from
> > qsysopr but my compiles were still taking 20 seconds each.  Did about
> > 20 compiles and they were all slow. Now I am back on the system 30
> > minutes later and the compiles are running fast again. About 4 seconds
> > each.   For a reason I cant explain, the system took a little while
> > for the disk cache memory to start working.
> >
> > -Steve
> >
> >
>
> --
> Larry Bolhuis                   IBM eServer Certified Systems Expert:
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