[CentOS] installing centOS on extended partition

m.roth at 5-cent.us m.roth at 5-cent.us
Thu Oct 14 13:57:58 EDT 2010


Robert Heller wrote:
> At Thu, 14 Oct 2010 09:53:52 -0700 CentOS mailing list <centos at centos.org>
> wrote:
>>   On 10/14/10 6:53 AM, m.roth at 5-cent.us wrote:
>> > Ritika Garg wrote:
>> >> Can CentOS be installed on an extended partition? System has the
>> following
>> >> partitions:
>> >> OEM(reserved)-78MB(primary)
>> >> System-100MB(primary)
>> >> C-55GB(primary)
>> >> D-100GB(extended)
>> >> Can I divide D into 2 parts:70GB and 30GB and install CentOS in the
>> 70GB
>> >> logical partition?
>> > Of course. Extended or primary is an old, old DOS separation, but once
>> > they exist, everything just treats it as another partition.
>>
>> /boot still has to be on a primary, doesn't it?
>
> No.  The *only* thing that needs to be in any partitular place is the
> boot loader -- this is a BIOS thing: the BIOS wants the boot loader (or
> actually the first stage of it) in the MBR of the first disk.  Both
<snip>
> LVM VG.  It can be a *mirrored* (RAID1) set.  Trickyness: if your /boot
> raid set is on the first & second disk (eg /dev/sda and /dev/sdb or
> /dev/hda and /dev/hdb) and you want to be able to boot if the first
<snip>
Ah, but what about hardware raid, say, a Dell PERC 7, with the two
internal drives raided by that, *not* by software? I'm not sure I can see
them as separate disks to grub-install.

       mark



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