On Thu, Jan 14, 2010 at 5:22 PM, Richard Elling <richard.ell...@gmail.com>wrote:
> On Jan 14, 2010, at 11:02 AM, Christopher George wrote: > > >> That's kind of an overstatement. NVRAM backed by on-board LI-Ion > >> batteries has been used in storage industry for years; > > > > Respectfully, I stand by my three points of Li-Ion batteries as they > relate > > to enterprise class NVRAM: ignition risk, thermal wear-out, and > > proprietary design. As a prior post stated, there is a dearth of > published > > failure statistics of Li-Ion based BBUs. > > > >> I can easily point out a company that has shipped tens of > >> thousands of such boards over last 10 years. > > > > No argument here, I would venture the risks for consumer based Li-Ion > > based products did not become apparent or commonly accepted until > > the user base grew several orders of magnitude greater than "tens of > > thousands". > > > > For the record, I agree there is a marked convenience with an integrated > > high energy Li-Ion battery solution - but at what cost? > > I see nothing in the design that precludes a customer from using a > Li-Ion battery, if they so desire. Perhaps the collective has forgotten > that DC power is one of the simplest and most widespread interfaces > around? :-) > > So it boils down to packaging. I personally dislike having batteries > all over the place, and I've seen dozens of customers who never > pay attention to the battery status on their systems. However, for > future design considerations, an optional internal energy mount > can keep the wolves at bay. > -- richard > > Personally I'd say it's a must. Most DC's I operate in wouldn't tolerate having a card separately wired from the chassis power. It's far, far, far more likely to have a tech knock that power cord out and not have anyone notice than to have a battery spontaneously combust. My .02. -- --Tim
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