[nmglug] filesystem optimization on software raid 5

[Jason Schaefer]

So, back to "filesystem optimization" ??



Ken Long wrote:
> On 13 Jun 2007 at 7:55, Aaron wrote:
>
>   
>> RAID5, in general, is a bit dangerous.  Software RAID5, even more so.
>> As one disk dies, it tends to produce some bad data, which in turn,
>> corrupts the other drives.  Some data is often lost.
>> I'm not an expert at the recovery tools...  but theoretically,
>> you should only loose a little data if you can re-build the rest OK.
>>     
>
> People use raid 5 in their servers because it is more reliable. If 
> you lose one drive you can keep on running with no loss of data 
> while you schedule the drive replacement. That's the whole point.
>
> After the failed drive has been replaced no one is the wiser. 
> (Except the poor system admin who has grown several more grey hairs 
> over the whole incident.)
>
> Physical security, power protection and daily backups are also part 
> of the overall strategy.
>
> Ken
>
>
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