CentOS - Aug 2007 - OT: Suggestions for RAID HW for 2 SATA drives in Dell PowerEdge SC

Looking at the Dell PowerEdge 440SC web page for Colombia. The box will
have two  250 GB SATA drives. The HD controller is: SAS 5IR SAS,Internal
Raid Adapter (SAS5IR)

 
for  HD Configuration) the options are:
(1) Add-in SAS5iR (SATA/SAS Controller)-RAID 0 (ASASR0)
(2) Onboard SATA, 2 Drives connected to Onboard SATA Controller No RAID
(MST2)
 (3) Add-in SAS5iR (SATA/SAS Controller) which supports 1-2 Hard
Drives-No RAID (ASAS)
 (4) Add-in SAS5iR (SATA/SAS Controller)-RAID 1 (ASASR1) 

Apparently the cost for them is the same. Option 1 (RAID 0) or Option 4
(RAID 1)? Suggestions solicited! TIA, Lanny


BTW: I plan to put CentOS on it. If Dell installs Linux, with 1 year
support, down here they charge:
(a) Red Hat Enterprise Linux ES 4, 1 year subscription to Red Hat
Network, English (RH4ES1) [about US$400]
(b) SUSE Linux Enterprise Server 10, 1 CPU, 1 YR Subscription, FI
(SL101S1) [about US$160]

> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Lanny Marcus
> 
> Looking at the Dell PowerEdge 440SC web page for Colombia. 
> The box will
> have two  250 GB SATA drives. The HD controller is: SAS 5IR 
> SAS,Internal
> Raid Adapter (SAS5IR)
> 
>  
> for  HD Configuration) the options are:
> (1) Add-in SAS5iR (SATA/SAS Controller)-RAID 0 (ASASR0)
> (2) Onboard SATA, 2 Drives connected to Onboard SATA 
> Controller No RAID
> (MST2)
>  (3) Add-in SAS5iR (SATA/SAS Controller) which supports 1-2 Hard
> Drives-No RAID (ASAS)
>  (4) Add-in SAS5iR (SATA/SAS Controller)-RAID 1 (ASASR1) 
> 
> Apparently the cost for them is the same. Option 1 (RAID 0) 
> or Option 4
> (RAID 1)? Suggestions solicited! TIA, Lanny
> 
> 
> BTW: I plan to put CentOS on it. If Dell installs Linux, with 1 year
> support, down here they charge:
> (a) Red Hat Enterprise Linux ES 4, 1 year subscription to Red Hat
> Network, English (RH4ES1) [about US$400]
> (b) SUSE Linux Enterprise Server 10, 1 CPU, 1 YR Subscription, FI
> (SL101S1) [about US$160]
I wouldn't worry too much about the OS HD configuration, you are
always going to want RAID1 for the OS, whether software or hardware.

Reason I say not to worry too much about the OS HD config is because
you are almost certainly going to put the application or user data
on a separate array, so the OS HD is basically used for loading
binaries.

-Ross

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2007/8/29, Lanny Marcus <mailing-lists at
computer2.com>:
> Looking at the Dell PowerEdge 440SC web page for Colombia. The box will
> have two  250 GB SATA drives. The HD controller is: SAS 5IR SAS,Internal
> Raid Adapter (SAS5IR)
>
>
> for  HD Configuration) the options are:
> (1) Add-in SAS5iR (SATA/SAS Controller)-RAID 0 (ASASR0)
> (2) Onboard SATA, 2 Drives connected to Onboard SATA Controller No RAID
> (MST2)
>  (3) Add-in SAS5iR (SATA/SAS Controller) which supports 1-2 Hard
> Drives-No RAID (ASAS)
>  (4) Add-in SAS5iR (SATA/SAS Controller)-RAID 1 (ASASR1)
>
> Apparently the cost for them is the same. Option 1 (RAID 0) or Option 4
> (RAID 1)? Suggestions solicited! TIA, Lanny
>
>
> BTW: I plan to put CentOS on it. If Dell installs Linux, with 1 year
> support, down here they charge:
> (a) Red Hat Enterprise Linux ES 4, 1 year subscription to Red Hat
> Network, English (RH4ES1) [about US$400]
> (b) SUSE Linux Enterprise Server 10, 1 CPU, 1 YR Subscription, FI
> (SL101S1) [about US$160]
>
I would use software raid 1.

On 30 August 2007, "Alexander Georgiev" <alexander.georgiev at
gmail.com>
wrote:
> Message: 65
> I would use software raid 1.
> 
Alexander: Thanks! Everyone has recommended RAID 1. That's what I 
will use. Lanny