On 7/7/06, Pieter Palmers <pieterp@xxxxxxx> wrote:
Loki Davison wrote: > On 7/7/06, Pieter Palmers <pieterp@xxxxxxx> wrote: > >> carmen wrote: >> > On Thu Jul 06, 2006 at 02:00:05PM -0400, Dan Easley wrote: >> >> On 7/6/06, Pieter Palmers <pieterp@xxxxxxx> wrote: >> >>> 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? >> > >> > 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. >> > >> The RAID does *not* help against power failures. been there, done that. >> >> rsync will do, but then you have to make sure that the outage does not >> occur when running rsync. Anyway it lowers the chance that you'll have >> problems. >> >> > soudns like overkill as a hedge against drive failure though. >> drives will >> fail. >> >> UPS'es don't prevent mechanical drive failure, but they do prevent >> 'soft' bad sectors. My belief is that these are the most common. >> >> I wouldn't think a 100€ UPS is more overkill than an extra 160G drive >> (costing about the same) for RAID/rsync mirroring. >> >> I've made up my mind about this: 'this UPS is to stay', but feel free >> not to agree of course ;) >> >> Pieter >> > > 100 euro! for 160G ouch! my 300 gb 16 mb cache sata2 drive was much > less than that! I don't really have anything that vitial that loosing > it would really suck... guess if i ever make some decent recordings... I have the bad luck of living in an expensive country I guess: WD Caviar 1600JS : 160 Gb S-ATA II (7200/300-8Mb): 86 euro Seagate Barracuda 7200.9 160Gb S-ATA II 8Mb: 88 euro Maxtor 6V160E0 : 160Gb (7200/300-8Mb) SATA II: 78 euro MGE Protection Center 420: 89 euro MGE Protection Center 500 USB: 102 euro The 300Gb disks are around 120 euro here. Probably the you'll be able to get a UPS for less then too. Greets, Pieter PS: where did you get these prices?
135.00 AUD Australia Dollars = 78.9844 EUR Euro Maxtor 300gb http://www.msy.com.au/Parts/PARTS.pdf Good prices there on most stuff. Though probably more handy if you live in Australia ;) Loki
