[CentOS] Help with megaraid_mbox driver

Sun Feb 19 17:17:04 UTC 2006
Steve Bergman <steve at rueb.com>

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:


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.