Toby Bluhm wrote:
With raid 10, if it happens on one of the disks in the other set, you
don't have a problem, and if it happens to the disk in the same set
(not very likely),
A 1 in 3 chance of putting the two worst disks together when using 4
disk raid10.
Yes, as in a 33% chance vs a 100% chance with raid5.
I know there is a raid10 personality for md. I saw it in the source
code. I see people's boot logs all over the web that say this:
md: linear personality registered as nr 1
md: raid0 personality registered as nr 2
md: raid1 personality registered as nr 3
md: raid10 personality registered as nr 9
md: raid5 personality registered as nr 4
Why does CentOS5 not support the raid10 personality? Do i need to
custom compile md? Do I need to custom compile the kernel? Russ
You have enlightened me to the raid10 module:
[root@tikal ~]# locate raid10
/usr/src/kernels/2.6.9-42.0.3.EL-smp-i686/include/config/md/raid10
/usr/src/kernels/2.6.9-42.0.3.EL-smp-i686/include/config/md/raid10/module.h
/usr/src/kernels/2.6.9-42.0.3.EL-smp-i686/include/linux/raid/raid10.h
/usr/src/kernels/2.6.9-42.0.10.EL-i686/include/config/md/raid10
/usr/src/kernels/2.6.9-42.0.10.EL-i686/include/config/md/raid10/module.h
/usr/src/kernels/2.6.9-42.0.10.EL-i686/include/linux/raid/raid10.h
/usr/src/kernels/2.6.9-42.0.3.EL-i686/include/config/md/raid10
/usr/src/kernels/2.6.9-42.0.3.EL-i686/include/config/md/raid10/module.h
/usr/src/kernels/2.6.9-42.0.3.EL-i686/include/linux/raid/raid10.h
/lib/modules/2.6.9-42.0.3.EL/kernel/drivers/md/raid10.ko
/lib/modules/2.6.9-42.0.10.EL/kernel/drivers/md/raid10.ko
/lib/modules/2.6.9-42.0.3.ELsmp/kernel/drivers/md/raid10.ko
[root@tikal ~]# modprobe raid10
[root@tikal ~]# lsmod | grep raid
raid10 23233 0
raid1 20033 1
This is not a Centos 5 machine though, it's SL4.4.
Yes, this is exactly what I'm looking to use. How would I go about
enabling it on CentOS?
Russ
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