Hi all,
Installing 5.5 on a fresh system having an Intel RAID.
My 2 drives are configured as a mirror within the Intel BIOS.
When starting my install, Anaconda throws an exception.
After a brief goog, I see one possible fix is - at the install prompt, type;
linux text nodmraid
This is fine and all but Centos sees 2 disks at this point rather then 1 which is what I thought the Intel RAID controller would present to the OS.
I am pretty much tarded when it comes to installs as I usually boot of a DVD, enter some choices based on requirements and off I go.
I once compiled a network driver into the initrd and remade my boot disk but that seems beyond me now.
Any help is greatly appreciated.
- aurf
On Wed, Jan 5, 2011 at 8:36 PM, aurfalien@gmail.com wrote:
Hi all,
Installing 5.5 on a fresh system having an Intel RAID.
My 2 drives are configured as a mirror within the Intel BIOS.
"Intel RAID" covers a lot of sins. Some RAID cards rely on OS software to do much of the RAID: they're jokes, really. If it's a real RAID chipset, no Linux or Windows kernel should even be *AWARE* of the multiple disks, except perhaps for some limited reporting tools.
Exactly which chipset are you dealing with? On what kind of machine.
When starting my install, Anaconda throws an exception.
After a brief goog, I see one possible fix is - at the install prompt, type;
linux text nodmraid
This is fine and all but Centos sees 2 disks at this point rather then 1 which is what I thought the Intel RAID controller would present to the OS.
I am pretty much tarded when it comes to installs as I usually boot of a DVD, enter some choices based on requirements and off I go.
I once compiled a network driver into the initrd and remade my boot disk but that seems beyond me now.
Any help is greatly appreciated.
- aurf
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On Jan 5, 2011, at 6:09 PM, Nico Kadel-Garcia wrote:
On Wed, Jan 5, 2011 at 8:36 PM, aurfalien@gmail.com wrote:
Hi all,
Installing 5.5 on a fresh system having an Intel RAID.
My 2 drives are configured as a mirror within the Intel BIOS.
"Intel RAID" covers a lot of sins.
Yes, I like this, and a lot of BS.
Some RAID cards rely on OS software to do much of the RAID: they're jokes, really. If it's a real RAID chipset, no Linux or Windows kernel should even be *AWARE* of the multiple disks, except perhaps for some limited reporting tools.
Exactly which chipset are you dealing with? On what kind of machine.
Instead of typing this;
linux text nodmraid
I used this;
linux text smenodmraid
... and all is well.
Although I've a feeling that just installing in text mode rather than GUI would have been enough.
My specs;
Supermicro X8DT3-LN4F with the Intel 5520 chipset.
Aurfalien@gmail.com wrote on Wed, 5 Jan 2011 18:55:14 -0800:
linux text smenodmraid
This a parameter unknown to Google. Did you make it up, or where did you get it from?
Although I've a feeling that just installing in text mode rather than GUI would have been enough.
me, too ;-) At least, "nodmraid" is not the solution. That's just ignoring the fake RAID if it is able to detect it. dmraid is meant to deal with this fake RAID stuff, but can't always.
Kai
On Jan 6, 2011, at 10:31 AM, Kai Schaetzl wrote:
Aurfalien@gmail.com wrote on Wed, 5 Jan 2011 18:55:14 -0800:
linux text smenodmraid
This a parameter unknown to Google. Did you make it up, or where did you get it from?
Well, I wished I would have made it up as we all ride on the coat tails of some one else's research and findings, but I found it here;
http://bugs.contribs.org/show_bug.cgi?id=6181
me, too ;-) At least, "nodmraid" is not the solution.
Yea, the nodmraid didn't work in text mode anyways, but I did a re install in text mode w/o using nosmedmraid and it failed so in my case, using smenodmraid worked.
- aurf
Hi all,
Installing 5.5 on a fresh system having an Intel RAID.
My 2 drives are configured as a mirror within the Intel BIOS.
When starting my install, Anaconda throws an exception.
After a brief goog, I see one possible fix is - at the install prompt, type;
linux text nodmraid
This is fine and all but Centos sees 2 disks at this point rather then 1 which is what I thought the Intel RAID controller would present to the OS.
I am pretty much tarded when it comes to installs as I usually boot of a DVD, enter some choices based on requirements and off I go.
I once compiled a network driver into the initrd and remade my boot disk but that seems beyond me now.
Any help is greatly appreciated.
You are much better off disabling the fake raid in bios and just using software raid:
http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-raid-config.html
Or Google: centos 5 software raid.
You are much better off disabling the fake raid in bios and just using software raid:
http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-raid-config.html
Or Google: centos 5 software raid.
Thanks Matt.
I have done sw raid on Centos before and have never had issues with it. . I think I will try it in this case, good idea.
- aurf
Thanks for that bit of advice. I've never been able to recover from hardware raid on any Intel system. The software raid is simple to configure and it works!
-- Thanks,
Gene Brandt SCSA 8625 Carriage Road River Ridge, LA 70123
home 504-737-4295
cell 504-452-3250
Family Web Page | My Web Page | LinkedIn | Facebook | Resumebucket
On Thu, 2011-01-06 at 11:08 -0800, aurfalien@gmail.com wrote:
You are much better off disabling the fake raid in bios and just using software raid:
http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5
http://www.centos.org/docs/5/html/Deployment_Guide-en-US/s1-raid-config.html
Or Google: centos 5 software raid.
Thanks Matt.
I have done sw raid on Centos before and have never had issues with it. . I think I will try it in this case, good idea.
- aurf
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 01/06/11 11:11 AM, Gene Brandt wrote:
Thanks for that bit of advice. I've never been able to recover from hardware raid on any Intel system. The software raid is simple to configure and it works!
its not actually hardware raid.
when you set the 'raid mode' in the BIOS, at power up it sets a bit in the ICH chip which changes its PCI DeviceID from 'regular SATA controller' to 'Intel Matrix FakeRaid'. thats *ALL* it does, change the device ID. no other hardware changes. the controller is still a plain old multiport SATA controller.
the device ID is used to pick which driver by the OS plug-n-play stuff. the regular setting choses the regular SATA driver while the 'fakeraid' setting loads the fakeraid driver (dmraid in Linux). the fakeraid driver implements all the raid in the device driver. This is only really useful for MS Windows non-Server distributions which don't support native mirroring or whatever in the OS.
On 01/06/11 11:11 AM, Gene Brandt wrote:
Thanks for that bit of advice. I've never been able to recover from hardware raid on any Intel system. The software raid is simple to configure and it works!
its not actually hardware raid.
when you set the 'raid mode' in the BIOS, at power up it sets a bit in the ICH chip which changes its PCI DeviceID from 'regular SATA controller' to 'Intel Matrix FakeRaid'. thats *ALL* it does, change the device ID. no other hardware changes. the controller is still a plain old multiport SATA controller.
the device ID is used to pick which driver by the OS plug-n-play stuff. the regular setting choses the regular SATA driver while the 'fakeraid' setting loads the fakeraid driver (dmraid in Linux). the fakeraid driver implements all the raid in the device driver. This is only really useful for MS Windows non-Server distributions which don't support native mirroring or whatever in the OS.
Hi John,
Another reason to use SW raid which I have switched too.
Although the conversation did generate some really good info.
Yea, that Intel RAID is a real POS.
- aurf
Great information to know. That sounds like a very nasty situation. -- Thanks,
Gene Brandt SCSA 8625 Carriage Road River Ridge, LA 70123
home 504-737-4295
cell 504-452-3250
Family Web Page | My Web Page | LinkedIn | Facebook | Resumebucket
On Thu, 2011-01-06 at 12:40 -0800, John R Pierce wrote:
On 01/06/11 11:11 AM, Gene Brandt wrote:
Thanks for that bit of advice. I've never been able to recover from hardware raid on any Intel system. The software raid is simple to configure and it works!
its not actually hardware raid.
when you set the 'raid mode' in the BIOS, at power up it sets a bit in the ICH chip which changes its PCI DeviceID from 'regular SATA controller' to 'Intel Matrix FakeRaid'. thats *ALL* it does, change the device ID. no other hardware changes. the controller is still a plain old multiport SATA controller.
the device ID is used to pick which driver by the OS plug-n-play stuff. the regular setting choses the regular SATA driver while the 'fakeraid' setting loads the fakeraid driver (dmraid in Linux). the fakeraid driver implements all the raid in the device driver. This is only really useful for MS Windows non-Server distributions which don't support native mirroring or whatever in the OS.
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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Gene Brandt -
John R Pierce -
Kai Schaetzl -
Matt -
Nico Kadel-Garcia