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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Raid 0+1 or Raid 1+0
Jared
Read below, This is your reply.
Am I correct in that the last Raid 0+1 should actually be Raid 1+0
With RAID 0+1 you immediately lose 50% of your IO capacity when a drive fails. With a 10 disk ---> RAID 0+1 <--- setup, you lose 10% of your IO capacity with a drive failure
George
You Have The Obligation to Inform One Honestly of the risk, And As a Person You Are Committed to Educate Yourself to the Total Risk In Any Activity! Once Informed & Totally Aware of the Risk, Every Fool Has the Right to Kill or Injure Themselves as They See Fit!
-----Original Message-----
Sent: 22 May 2003 21:18 PM
To: Multiple recipients of list ORACLE-L
With RAID 0+1 you immediately lose 50% of your IO capacity when a drive fails. With a 10 disk RAID 0+1 setup, you lose 10% of your IO capacity with a drive failure.
Stephen Lee <Stephen.Lee_at_DTAG.Com>
Sent by: root_at_fatcity.com
05/22/2003 07:41 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
cc:
Subject: RE: Raid 0+1 or Raid 1+0
I wonder if there would be some difference in write speed with one versus the other. The only thing I ever played with was stripe then mirror. Stripe then mirror was never a problem for me because I didn't wait around for another drive to fail. Most software and hardware that does this also allows you to set up hot spares.
> -----Original Message-----
> Hi all
>
> Some documents I read says use RAID 0 + 1 but then if you look at what
> happens when a single drive fails you switch over to the
> other side of the
> raid, thus you can only tolerate 1 drive failure before a second drive
> failure brings the storage system down,
>
> Raid 0 + 1 = Stripe + Mirror which equates to Oracle SAME methodology
>
> Whereas
>
> Using Raid 1 + 0 gives the same performance but you can
> handle multiple
> drive failures.
>
> Views and comments please.
>
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Stephen Lee INET: Stephen.Lee_at_DTAG.Com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: INET: Jared.Still_at_radisys.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). This email and all contents are subject to the following disclaimer: "http://www.didata.com/disclaimer.asp" -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: INET: George.Leonard_at_za.didata.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Fri May 23 2003 - 02:21:51 CDT
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