RAID 1 is mirroring (data are stored on both diks), RAID 0 is striping (data are split between both disk). If one disk fail, You will loose your data in RAID 0, not in RAID 1. You can change this setting yourself later using the BIOS menu or the DELL CD. I recommend RAID 1 for safety Regards PS: RAID 1 don't dispense you to regularly check if both disk are healthy and how to replace a defect one without losing valuable data saved on the other. On 8/29/07, Ross S. W. Walker <rwalker at medallion.com> wrote: > > > 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 > > ______________________________________________________________________ > This e-mail, and any attachments thereto, is intended only for use by > the addressee(s) named herein and may contain legally privileged > and/or confidential information. If you are not the intended recipient > of this e-mail, you are hereby notified that any dissemination, > distribution or copying of this e-mail, and any attachments thereto, > is strictly prohibited. If you have received this e-mail in error, > please immediately notify the sender and permanently delete the > original and any copy or printout thereof. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Alain Spineux aspineux gmail com May the sources be with you -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070830/4dcfbb25/attachment-0004.html>