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[Gaffers]

note : you must use  a mobo supporting raid level 1..

(if you are not after high performance)

for data protection..with that you will use 2 same capacity disks (1 original 1 for mirror) .. Sata is ok for that ..

That what I am thinking, between 1-2TB x 2 (one for mirror) depending on price.  The hard part will be getting SWMBO to follow the organisation policy I will implement...

[Welung666]

Thatnks for the link Mr S. I've just ordered me 4 of them 1.5tb drives for my new server build

[Mr Skrunts]

Thatnks for the link Mr S. I've just ordered me 4 of them 1.5tb drives for my new server build

Nice.   

[KillerWatt]

All drive manufacturers have their high & low points in production.

Me personally, I'm using Seagate drives that are actually designed to be in a server/corporate environment (on 24/7).

As far as mirroring goes, you don't have to use identical drives.....but I have seen 2 disks fail pretty much simultaneously (so bear that in mind if you think you are safe with RAID 1).

[zirax]

All drive manufacturers have their high & low points in production.

Me personally, I'm using Seagate drives that are actually designed to be in a server/corporate environment (on 24/7).

As far as mirroring goes, you don't have to use identical drives.....but I have seen 2 disks fail pretty much simultaneously (so bear that in mind if you think you are safe with RAID 1).

This is a good point. If you buy two hdds together then it's likely they will be from the same batch. So far I've had 2 pairs of hdds fail within a few days of each other.

Remember raid 1 is not a backup solution. While it will protect you from hdd failure, one power spike and it's all dead

[KillerWatt]

Remember raid 1 is not a backup solution. While it will protect you from hdd failure, one power spike and it's all dead

That is why you implement a UPS that actually does what it says on the tin (ie, NOT cheap chinese crap).

[cem_devecioglu]

All drive manufacturers have their high & low points in production.

Me personally, I'm using Seagate drives that are actually designed to be in a server/corporate environment (on 24/7).

As far as mirroring goes, you don't have to use identical drives.....but I have seen 2 disks fail pretty much simultaneously (so bear that in mind if you think you are safe with RAID 1).

This is a good point. If you buy two hdds together then it's likely they will be from the same batch. So far I've had 2 pairs of hdds fail within a few days of each other.
Remember raid 1 is not a backup solution. While it will protect you from hdd failure, one power spike and it's all dead

ok..whats the probability of 2 disks bought at the same time will be donald at the same exact moment ?

my more than 20 years experience say 0.0 with all the servers, pcs  I've set up or worked on..

And for the electrical problem, if it can effect disks no raid on earth can survive that ..so no alternative raid solution exists..

and again by experience power supplies are the victims 99.9 % on electrical problems.. (remember there are very frequent voltage jumps in my country than yours)

briefly raid 1 is the most cheap protection without complicating the scenario..

and I need to say : the seagate disk on my last system is definitely slower than the western digital.. and dont start up from time to time..

[KillerWatt]

ok..whats the probability of 2 disks bought at the same time will be donald at the same exact moment ?

my more than 20 years experience say 0.0 with all the servers, pcs  I've set up or worked on..

You need to get more experience then, I have seen 2 drives fail.
Granted they didn't fail simultaneously, but they did fail within 15 secs of each other (which is as near as dammit as failing together).

[cem_devecioglu]

ok..whats the probability of 2 disks bought at the same time will be donald at the same exact moment ?

my more than 20 years experience say 0.0 with all the servers, pcs  I've set up or worked on..

You need to get more experience then, I have seen 2 drives fail.
Granted they didn't fail simultaneously, but they did fail within 15 secs of each other (which is as near as dammit as failing together).

 

KillerWatt, you must be "blessed"   go on buy a lottery ticket

[cem_devecioglu]

seriously , your problem must be a factory defect.. :-/

[TheBoy]

ok..whats the probability of 2 disks bought at the same time will be donald at the same exact moment ?

my more than 20 years experience say 0.0 with all the servers, pcs  I've set up or worked on..

You need to get more experience then, I have seen 2 drives fail.
Granted they didn't fail simultaneously, but they did fail within 15 secs of each other (which is as near as dammit as failing together).

Exactly - some people here know I had 3 drives fail over a weekend about 3 weeks back.

had a server the other day that lost both disks in mirror - not a common occurance but does happen.  Also mirroring does not protect against corrup[tion.

[TheBoy]

my vote goes for the Samsung Spinpoint F1 1Tb 32Mb cache drive.  Got a few of them here.


For servers, the SAS disks we use all seem much of a muchness - Seagate Cheetah, WD Enterprise etc - nothing between them

[cem_devecioglu]

ok..whats the probability of 2 disks bought at the same time will be donald at the same exact moment ?

my more than 20 years experience say 0.0 with all the servers, pcs  I've set up or worked on..

You need to get more experience then, I have seen 2 drives fail.
Granted they didn't fail simultaneously, but they did fail within 15 secs of each other (which is as near as dammit as failing together).

Exactly - some people here know I had 3 drives fail over a weekend about 3 weeks back.

had a server the other day that lost both disks in mirror - not a common occurance but does happen.  Also mirroring does not protect against corrup[tion.

you are all "blessed"

[cem_devecioglu]

some numbers:

"The likelihood that the hard drive fails within one year is 0.34%, that it fails within two years is 0.68%, that it fails within three years is 1.02%. Indeed, since 0.9966 is so close to 1 it has a very small effect so the student’s initial thought of N·(0.34%) turns out to be a pretty good estimate for quite a few years [at 10 years out the theoretical probability would be 3.35% compared to 3.4%, and 20 years out the theoretical probability is 6.59% compared to 6.8%.]"

from
http://threesixty360.wordpress.com/2008/06/04/hard-drive-failure/

if you calculate those probabilities including time factor.. you need to be really unlucky to see them fail together.. :-/

[KillerWatt]

if you calculate those probabilities including time factor.. you need to be really unlucky to see them fail together.. :-/

Or your chosen manufacturer has a bad production run (they have all suffered, and it hasn't become public knowledge until it's too late).