6 Jul
2006
6 Jul
'06
6:18 p.m.
On Thu Jul 06, 2006 at 02:00:05PM -0400, Dan Easley wrote:
On 7/6/06, Pieter Palmers <pieterp(a)joow.be>
wrote:
im guessing 2 drives , synched nightly via rsync, or in a RAID configuration, is cheaper,
and friendlier for the environment than huge/heavy UPS batteries. i guess i'd invest
in that if the electricity infrastructure in my area was particularly bad. or in
combination with daytime solar replenishing to run completely off-grid.
soudns like overkill as a hedge against drive failure though. drives will fail.
Paul Winkler wrote:
> On Thu, Jul 06, 2006 at 01:43:40PM +0200, Pieter Palmers wrote:
>> Modern harddisks use a lot of write caching on the controller to achieve
>> decent performance. So when power goes down when there is data in the
>> write cache, it is lost. The file system however 'thinks' that data has
>> been written correctly. This hence results in file system corruption.
Thanks much for this whole thread. It's added substance to what I
previously thought was just personal paranoia and suspicion.
I've been under the impression it's cheaper to buy used UPS's and buy
replacement batteries for them. Has anyone done this to good results?