No, that's RAID 50... Raid 10 is a strip set of mirrored drives. 0+1 = is a mirrored strip-set.. Raid 50 is a Raid 5 strip-set (w/ parity) of = mirrored drives. JOe -----Original Message----- From: Ziots, Edward [mailto:EZiots@xxxxxxxxxxxx] Sent: Thursday, December 12, 2002 1:44 PM To: 'thin@xxxxxxxxxxxxx' Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate disk? Actually I just built a server, and it shows RAID 1+0 not 0+1, but most people think of RAID 0+1 as RAID 10. Which is a RAID 5 Array Mirrored, = so basically it would be 4 drives. ( Actually I believe 3 would be fine)=20 Disk1 Disk2 Disk3 Data Data Parity Data Parity Data Parity Data Data Then Disk 1,2,3 would be mirrored to each other.=20 Honestly I believe RAID 10 needs 4 disks, where a stripped ( Non Parity) Mirror would only need 2.=20 EZ -----Original Message----- From: P.J. Johannsen [mailto:pjohannsen@xxxxxxxxxxx] Sent: Thursday, December 12, 2002 3:27 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate disk? I agree with you, Joe. I have run the Compaq SmartStart on DL360s with = two=20 drives and they default to 0+1. However, my traditional understanding = of=20 RAID is that 0+1 should be a mirrored array. (Two or more drives times = two) I would be interested in knowing the reason for the 0+1 specification = with two drives as well. PJ >From: "Joe Shonk" <JShonk@xxxxxxxxxxxxxx> >Reply-To: thin@xxxxxxxxxxxxx >To: <thin@xxxxxxxxxxxxx> >Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate = >disk? >Date: Thu, 12 Dec 2002 07:09:46 -0800 > > >Again, how is this possible with only two drives? Raid 0+1 is a two = =3D >strip sets mirrored. A strip set would require 2 drives, and to mirror = =3D >them 2 more. Thus 4 drives... Setting Raid 0+1 on 2 drives is just = =3D >Raid 1. > >Joe > >-----Original Message----- >From: Ziots, Edward [mailto:EZiots@xxxxxxxxxxxx] >Sent: Thursday, December 12, 2002 6:52 AM >To: 'thin@xxxxxxxxxxxxx' >Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate >disk? > > > >I have done this with Compaq Smart Start, with a system with 2 drives. = =3D >It >defaults to RAID0+1 which is a stripped Mirror. Note I didn't say with >parity... > >EZ > >-----Original Message----- >From: Joe Shonk [mailto:JShonk@xxxxxxxxxxxxxx] >Sent: Wednesday, December 11, 2002 5:40 PM >To: thin@xxxxxxxxxxxxx >Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate >disk? > > > >Huh? How do you do RAID 0+1 with only two drives? You need 4 drives = =3D >=3D3D >for that, the blades only allow for two. > >In any case, server class raid controllers generally support RAID 10 = =3D3D >over 0+1. RAID 10 is a little better that 0+1. > >Joe > >-----Original Message----- >From: Ziots, Edward [mailto:EZiots@xxxxxxxxxxxx] >Sent: Wednesday, December 11, 2002 2:56 PM >To: 'thin@xxxxxxxxxxxxx' >Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate >disk? > > > >Defintely RAID 0+1, with page file as normal. Just make sure you size = it >1.5X Physical memory.=3D3D20 > >EZ > >-----Original Message----- >From: Joe Shonk [mailto:JShonk@xxxxxxxxxxxxxx] >Sent: Wednesday, December 11, 2002 4:34 PM >To: thin@xxxxxxxxxxxxx >Subject: [THIN] Re: mini-poll: mirrored disk or page file on a seperate >disk? > > > >Definately A... B will not give you extra performance. Keep in mind = =3D >=3D3D >=3D3D3D >that the Raid controller can read off of both disks in a RAID 1 = senario. > >2GB should be good. Depends on how resource intensive your apps are. > >Joe > >-----Original Message----- >From: Charles Morrall [mailto:Charles.Morrall@xxxxxxxxxx] >Sent: Wednesday, December 11, 2002 1:59 PM >To: thin@xxxxxxxxxxxxx >Subject: [THIN] mini-poll: mirrored disk or page file on a seperate >disk? > > >I'm semi-involved in a project where we are looking at deploying a = =3D3D3D >fairly large farm (approx 30 servers) using blade servers. Each blade = =3D >=3D3D >=3D3D3D >only has place for 2 drives, and we're not going to SAN attach them. >In this situation would you: >a) mirror two drives and place everything on this mirror set? >b) not mirror them and place the page file on it's own drive? >=3D3D3D20 >Option a is obviously for a bit more redundancy, option b is for = =3D3D3D >performance. Dual CPU blades with 2 or 4 GB RAM. >=3D3D3D20 >/charles > >***********************************************=3D3D3D20 >This Weeks Sponsor: triCerat Inc. >triCerat introduces RegSet. 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