Re: Raid 50

From: Matthew Zito <mzito_at_gridapp.com>
Date: Tue, 6 Jul 2004 17:02:05 -0400
Message-Id: <BC77036A-CF8F-11D8-ADF2-000393D3B578@gridapp.com>

Well, its a little unfair to go to management and say that they've taken risks with enterprise data and its availability. There's nothing inherently wrong or unsafe about RAID 5-(whatever) - yes, it is not as optimal as RAID 10 and yes, the performance is not as good as RAID 10, but there is no reason why he should be stressing about the day his RAID-50 setup will be the cause of his database downtime.

In fact, he's actually better off than the stock RAID-5 person, because his raid group sizes are being kept smaller, reducing his exposure during rebuilds.

To answer the gentleman's question, RAID-50 is striping across multiple RAID-5 sets. It's optimal for situations where many disks are needed in a RAID group, but rebuild times are a concern, but disk space is also an issue.

Thanks,
Matt

--
Matthew Zito
GridApp Systems
Email: mzito_at_gridapp.com
Cell: 646-220-3551
Phone: 212-358-8211 x 359
http://www.gridapp.com


On Jul 6, 2004, at 4:24 PM, Michael Fontana wrote:



> Write an email, right now, to your management, and to whomever was

> involved in this decision, expressing your deep concerns about the 

> risks

> they've taken with enterprise data and it's availability.

>

> This is your only chance, when your databases are down (and they

> inevitably will be in a matter of time), to defray the blame.

>

> And as I'm often fond of saying to those who make decisions I don't

> agree with, or are forced to live with them "good luck with that....".

>

>

>

>

> Michael Fontana

> Sr. DBA

> NTT/Verio

>

>

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Received on Tue Jul 06 2004 - 15:57:42 CDT