Hello...
I have a server with 4 x SCSI drives and I would like to install Centos 4 (or 5) onto a software RAID 10 array. Do you know if this is possible? I noticed that under the Centos 4.92 beta, RAID 5 is an option but for some reason RAID 10 is not listed.
There does appear to be a RAID 10 module....
/lib/modules/2.6.9-42.0.8.ELsmp/kernel/drivers/md/raid10.ko
More info I found here:
http://cgi.cse.unsw.edu.au/~neilb/01093607424
Many thanks for any help on this; I hate to buy hardware raid controller if not needed....
Mickey
Mickey Everts wrote:
Hello...
I have a server with 4 x SCSI drives and I would like to install Centos 4 (or 5) onto a software RAID 10 array. Do you know if this is possible? I noticed that under the Centos 4.92 beta, RAID 5 is an option but for some reason RAID 10 is not listed.
There does appear to be a RAID 10 module....
/lib/modules/2.6.9-42.0.8.ELsmp/kernel/drivers/md/raid10.ko
More info I found here:
http://cgi.cse.unsw.edu.au/~neilb/01093607424
Many thanks for any help on this; I hate to buy hardware raid controller if not needed....
Mickey
This is something I was just thinking about last night for a new server I am planning..
I would imagine to get RAID10 would require (assuming a 4 drive setup) you to create 2 RAID1 mirror sets and then using those create a RAID0 stripe.. I haven't attempted this yet and don't even know if its possible with software RAID yet.. Would be cool, performance and redundancy.. :)
It's possible. Works well
I would imagine to get RAID10 would require (assuming a 4 drive setup) you to create 2 RAID1 mirror sets and then using those create a RAID0 stripe.. I haven't attempted this yet and don't even know if its possible with software RAID yet.. Would be cool, performance and redundancy.. :) _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
____________________________ John Moylan john.moylan@rte.ie RTE Publishing Tel: 00 353 1 2083564 | www.rte.ie
*********************************************************** The information in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Please note that emails to, from and within RTÉ may be subject to the Freedom of Information Act 1997 and may be liable to disclosure. ************************************************************
Any more details how how your doing it?
Mickey
John Moylan wrote:
It's possible. Works well
I would imagine to get RAID10 would require (assuming a 4 drive setup) you to create 2 RAID1 mirror sets and then using those create a RAID0 stripe.. I haven't attempted this yet and don't even know if its possible with software RAID yet.. Would be cool, performance and redundancy.. :) _______________________________________________ CentOS mailing list CentOS@centos.org mailto:CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Actually, I guess I cheated a bit. I set up pairs of Mirrored disks on an MSA20 and then stripped them in software during the Centos Install. It was the easiest way to get around the silly partition size limits on the MSA20's RAID controller.
I'm sure it's straightforward enough to do everything in SW during the install though.
J
On Mon, 2007-04-02 at 02:30 -0700, Mickey Everts wrote:
Any more details how how your doing it?
Mickey
John Moylan wrote:
It's possible. Works well
I would imagine to get RAID10 would require (assuming a 4 drive setup) you to create 2 RAID1 mirror sets and then using those create a RAID0 stripe.. I haven't attempted this yet and don't even know if its possible with software RAID yet.. Would be cool, performance and redundancy.. :) _______________________________________________ CentOS mailing list CentOS@centos.org mailto:CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
____________________________ John Moylan john.moylan@rte.ie RTE Publishing Tel: 00 353 1 2083564 | www.rte.ie
*********************************************************** The information in this e-mail is confidential and may be legally privileged. It is intended solely for the addressee. Access to this e-mail by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. Please note that emails to, from and within RTÉ may be subject to the Freedom of Information Act 1997 and may be liable to disclosure. ************************************************************
Mickey Everts wrote:
Any more details how how your doing it?
Create two mirror arrays, then create a raid 0 array from those two md devices.
If you cannot, then cheat by using the console (Alt-F2 or Crtl-Alt-F2) and manually create the raid10 array. I remember doing this on RH9 (I tried RH7.3 but the syncing of the mirrors would kill anaconda then) but I cannot remember doing this for Centos 4....
I don't know if anaconda knows how to do it, but what about this idea:
create two softraid-1 devices, md0 and md1
now create an lvm vg that is striped across those devices
seems to capture the basic idea of raid 10, right?
Gordon
On 4/2/07, Mickey Everts mickey-ml@greenglow.org wrote:
Hello...
I have a server with 4 x SCSI drives and I would like to install Centos 4 (or 5) onto a software RAID 10 array. Do you know if this is possible? I noticed that under the Centos 4.92 beta, RAID 5 is an option but for some reason RAID 10 is not listed.
There does appear to be a RAID 10 module....
/lib/modules/2.6.9-42.0.8.ELsmp/kernel/drivers/md/raid10.ko
More info I found here:
http://cgi.cse.unsw.edu.au/~neilb/01093607424
Many thanks for any help on this; I hate to buy hardware raid controller if not needed....
Mickey
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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