Re: Newbie: Drive Configuration

From: MSarkozi <msarkozi_at_aol.comnojunk>
Date: 28 Mar 2001 06:41:19 GMT
Message-ID: <20010328014119.13964.00001153@ng-fd1.aol.com>

>>When a drive fails in Raid 5 performance goes through the floor. Yes
***Goes through the floor ...yes.

>>your data is safe,

***one additional failure away from lost....not safe really.

but the wait for it is long.
***long wait....yes and impact on interactive performance also.

With Raid 0 or 0+1, the
>>loss of a disk does not effect performance.
***loss of a disk in any 'typical' RAID configuration *DOES* effect performance....just not anything as dramtically as a RAID 5 failure
>>>
>
>That should be "with Raid 1 or 0+1", no? Raid 0 is striping, you loose
>a disk you loose the set.

***your observation is on the money. RAID 0 offers "0" protection...only speed.
>
>
>>Like people, databases come in all sizes and types. What is appropriate
>>for one is overkill for another. The most important thing is
>>understanding what your database does, the expectations for performance,
>>the criticality of the data, and your budget.
>>
>

>Well said!

***Very well said and summarized!
>
>Cheers
>Nuno Souto

Regards all,
Miki Sarkozi Received on Wed Mar 28 2001 - 00:41:19 CST