see below re /boot raid and grub . . .
> Hi Fajar,
>
> I would say it is basically a matter of your personal taste.
>
> However, if you wish to extend your LVs later without too much
> hassle
> I would prefer initially setting up one large RAID 1 which should
> serve
> as one PV.
> I would only separate the /boot partition to an isolated RAID 1
> meta device.
> Though it is possible to put /boot onto an LV I would strongly
> disuade you from doing so.
> The issue here is disaster recovery because you need a specially
> tuned kernel and
> initial ramdisk that can cope with loading the kernel from a
> /boot LV,
> which the recovery mode of your distro's install CD usually
> doesn't provide.
> Btw, for the same reason I found the ubiquitious Knoppix live CDs
> practically useless
> for my Linux boxes.
>
> So in /etc/fstab I would set
>
> /dev/mdo /boot ...
I was never able to get this working with grub and had to give up on
raid for the boot partition - that was about 6 months ago. Has
there been progress on this or did I miss the "correct" way to
configure boot raid with grub?
TIA
ahv
===
>
> as mountpoint.
>
> Then, assuming you built a big enough /dev/md1 to host /, /usr,
> /var, /tmp, /home
> I would create a root VG from one big PV
>
> e.g.
>
> # pvcreate /dev/md1
> # vgcreate -s 16 -p 8 -l 64 vgroot /dev/md1
>
> And then create your LVs al gusto
>
> e.g.
>
> # lvcreate -L 512m -n lv_root vgroot # if you're afraid you
> could increase / to 1G but usually 512m should suffice
> # lvcreate -L 3072m -n lv_usr vgroot # depending on the
> amount of binaries you install, cave kernel sources
> # lvcreate -L 2048m -n lv_var vgroot # for a web or mail
> server producing large spools and logs set high
> # lvcreate -L 512m -n lv_tmp vgroot
> # lvcreate -L 1024m -n lv_opt vgroot # some non-OS binaries
> like Fedora's Directory Server install here
> # lvcreate -L 2048m -n lv_home vgroot # depending on how many
> users you host
>
>
> Then create filesystems al gusto
>
> # vgdisplay -v vgroot|awk '/LV Name/{print$NF}'|xargs -n1
> mkfs.ext3
>
>
> If you run out of PEs and you need to increase any LV you can at
> any time
> add other RAID1 devs
>
> e.g. you have spare md2 md3 md4
>
> vgextend vgroot /dev/md[2-4]
>
>
> and then
>
> lvextend -L +4092m /dev/vgroot/lv_home
>
> ext2online /dev/vgroot/lv_home
>
>
> HTH
> Ralph
>
>> -----Original Message-----
>> From: fedora-list-bounces@xxxxxxxxxx
>> [mailto:fedora-list-bounces@xxxxxxxxxx]On Behalf Of Fajar
> Priyanto
>> Sent: Thursday, March 02, 2006 12:47 PM
>> To: For users of Fedora Core releases
>> Subject: Advice on setting up Raid and LVM
>>
>>
>> Hi all,
>> I'm setting up Raid 1 and LVM on 2x80GB SATA drives.
>>
>> The partition scheme is like this:
>> /boot = 300MB
>> / = 9.2GB
>> /home = 70GB
>> swap = 500MB
>>
>>
>> The RAID is RAID 1.
>> md0 = 300MB = /boot
>> md1 = 9.2GB = LVM
>> md2 = 70GB = LVM
>> md3 = 500MB = LVM
>>
>> Now, the confusing part is:
>> 1. When creating VolGroup00, should I include all PV (md1,
>> md2, md3)? Then
>> create the LV.
>> 2. When setting up RAID 1, should I make those separated
> partitions
>> for /, /home, and swap? Or, should I just make one big RAID
> device?
>>
>> The future purpose of using LVM is I want to be able to
>> expand any partitions
>> that would run out of space into a new disk.
>>
>> Thank you very much.
>> --
>> Fajar Priyanto | Reg'd Linux User #327841 | Linux tutorial
>> http://linux2.arinet.org
>> 18:35:53 up 4:55, 2.6.15-1.1830_FC4 GNU/Linux
>> Let's use OpenOffice. http://www.openoffice.org
>>
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