Ross S. W. Walker wrote:
Rudi Ahlers wrote:
John R Pierce wrote:
Rudi Ahlers wrote:
And then, how do I setup the partitioning? Do I setup /boot on a
separate RAID "partition"? If so, what happens if I want to replace
the 1st 2 HDD's with bigger ones?
each partition is raided seperately with mdadm.... you could make the
whole thing one LVM partition thats raid10, then use LVM to dice it up
into file systems.
if you have 4 drives and are doing software raid10, you won't be
swapping drives with different sizes without a WHOLE lotta pain.
Ok, so how do I do this? Let's say I have 4x 160GB HDD's now, and plan
on replacing them with 4x 500GB HDD's in the future?
Personally I would never put an OS install on a higher RAID then RAID1,
because it gets too messy to upgrade like you suggested.
So you're suggesting that I keep the OS separate from the data? But what
happens if both the 1st 2 drives with the OS fails, or needs to be replaced?
What setup would help with a upgrade in the future?
/boot shouldn't be mirrored, as the BIOS won't know how to boot it.
leave /dev/sdb1 the same size as /dev/sda1 and call it /boot2 and try
to remember to copy /boot to /boot2 each time you update the kernel.
I understand this, but how do you boot from /boot2 on the
second HDD if the 1st have failed?
Could you not get a system that had 2 drives for the OS and 4 drives
for data?
nope, unfortunately not. It's a 2U rackmount chassis with space for only
4 HDD's. I have been thinking about installing the OS onto a USB memory
stick, but have never actually got as far as trying to figure out how
todo it.
I have setup 4 disk RAID10 systems before, but they were never
intended to be upgraded (in place at least).
I can forward a couple of recipes, but let me first say that to do
it from the CentOS install media requires 2 RAID1s and LVM striping
because the RAID10 option isn't on the media, but it is functionally
equivalent both in useable space and performance.
Please share your recipes, I'd like to give it a try :)
--
Kind Regards
Rudi Ahlers
Check out my technical blog, http://blog.softdux.com for Linux or other technical stuff
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