[THIN] Re: mini-poll: mirrored disk or page file on a seperate disk?
- From: "Stansel, Paul" <Paul.Stansel@xxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Thu, 12 Dec 2002 15:29:32 -0500
That's odd, my DL360's with Smart Start always default to disk mirroring
only...
-Paul
> ----------
> From: P.J. Johannsen[SMTP:pjohannsen@xxxxxxxxxxx]
> Reply To: thin@xxxxxxxxxxxxx
> 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
> drives and they default to 0+1. However, my traditional understanding of
> 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 =
> >strip sets mirrored. A strip set would require 2 drives, and to mirror =
> >them 2 more. Thus 4 drives... Setting Raid 0+1 on 2 drives is just =
> >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. =
> >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
> >for that, the blades only allow for two.
> >
> >In any case, server class raid controllers generally support RAID 10 =3D
> >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.=3D20
> >
> >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
> >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 =3D3D
> >fairly large farm (approx 30 servers) using blade servers. Each blade =
> >=3D
> >=3D3D
> >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?
> >=3D3D20
> >Option a is obviously for a bit more redundancy, option b is for =3D3D
> >performance. Dual CPU blades with 2 or 4 GB RAM.
> >=3D3D20
> >/charles
> >
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