Loki Davison wrote:
> On 7/7/06, Pieter Palmers <pieterp@email-addr-hidden> wrote:
>
>> carmen wrote:
>> > On Thu Jul 06, 2006 at 02:00:05PM -0400, Dan Easley wrote:
>> >> On 7/6/06, Pieter Palmers <pieterp@email-addr-hidden> 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?
Received on Fri Jul 7 16:15:01 2006
This archive was generated by hypermail 2.1.8 : Fri Jul 07 2006 - 16:15:01 EEST