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 > We chose an external solution because it is a proven and industry > standard method of enterprise class data backup. > > Thanks, > > Christopher George > Founder/CTO > www.ddrdrive.com > -- > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
