Hi All,
I've built a custom CD based on CentOS 4.2. An OOB CentOS 4.2 disk will detect the megaraid (Perc4) card in a Dell 1850/2850, and load properly. My version does not. I have checked, and the original shipping kernel for CentOS contains the same megaraid_mbox driver as the updated kernel that is on my CD. Basically, my CD removed some RPMS, and added others for a custom distro. As far as I can see, the proper kernel files are still present (I'm using an unmodified buildinstall script, and Johnny Hughes' build script for the CD). Does anyone have any suggestions on how to figure out why the new CD says it cannot find an appropriate hard drive to install on?
Is there something specific that would be missing like pcitables, etc?
Thanks for any advice or suggestions.
-Scott
I'm going to say at the start that I might be completely wrong about this. (And I may be confusing FC4 with CentOS.) But are you sure you aren't needing the megaraid.ko driver rather than the megaraid_mbox?
Not sure about install time, but for boot time, mkinitrd gets this wrong and I have to go in and copy the proper module (which is not in kernel/drivers/scsi/megaraid, but in kernel/drivers/scsi) into the lib dir of the initrd and then add:
insmod /lib/megaraid.ko
to the init script in the initrd.
Anyway this link *might* be of help:
http://www.tuxyturvy.com/blog/index.php?/archives/4-Installing-RHEL4-on-Syst...
But have you considered the possiblility of using software RAID? After all the problems (along these very lines) that the legacy PERC cards have caused me, I'm moving my servers to software RAID.
It depends upon your specific situation, of course, but it makes sense to consider the possibility. For example, hardware RAID5 might be better if disk performance is critical, as RAID5 has a lot of processor overhead. But for, say, RAID1, software RAID has some advantages.
-Steve
Steve Bergman wrote:
I'm going to say at the start that I might be completely wrong about this. (And I may be confusing FC4 with CentOS.) But are you sure you aren't needing the megaraid.ko driver rather than the megaraid_mbox?
Unfortunately, I'm sure.
Not sure about install time, but for boot time, mkinitrd gets this wrong and I have to go in and copy the proper module (which is not in kernel/drivers/scsi/megaraid, but in kernel/drivers/scsi) into the lib dir of the initrd and then add:
insmod /lib/megaraid.ko
to the init script in the initrd.
The problem I'm seeing is at install.
Anyway this link *might* be of help:
http://www.tuxyturvy.com/blog/index.php?/archives/4-Installing-RHEL4-on-Syst...
Yeah, I've seen that page already, but thanks.
But have you considered the possiblility of using software RAID? After all the problems (along these very lines) that the legacy PERC cards have caused me, I'm moving my servers to software RAID.
It depends upon your specific situation, of course, but it makes sense to consider the possibility. For example, hardware RAID5 might be better if disk performance is critical, as RAID5 has a lot of processor overhead. But for, say, RAID1, software RAID has some advantages.
Unfortunately, this Distro is intended to work with specific hardware, and that hardware includes the raid controller, so I've gotta make it work. I don't disagree that software raid is useful, but I can't do it in this case.
Thanks!
-Scott
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Scott Sharkey -
Steve Bergman