Re: 4 Primary partitions limitations
- From: "LS Cheng" <exriscer@xxxxxxxxx>
- To: knecht.stefan@xxxxxxxxx
- Date: Sat, 22 Nov 2008 18:45:39 +0100
Well it's best practice to partition the disks in Linux because first few MB
(usually 4 or 8) should be skipped so all asm disks are aligned
Regards
--
LSC
On Sat, Nov 22, 2008 at 11:00 AM, Stefan Knecht <knecht.stefan@xxxxxxxxx>wrote:
> Why bother creating partitions ? Just use the devices directly in ASM. I
> dont really see any reason why you would want to partition them. Linux won't
> ever access those disks if you're using them in ASM, and ASM doesn't need
> partitions nor filesystems.
>
> Stefan
>
> =========================
>
> Stefan P Knecht
> Senior Consultant
> Systems Engineering
>
> OPITZ CONSULTING Schweiz GmbH
> Seestrasse 97
> CH-8800 Thalwil
>
> Mobile +41-79-571 36 27
> stefan.knecht@xxxxxxxxxxxxxxxxxxx
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>
> OCP 9i/10g SCSA SCNA
> =========================
>
>
>
> On Fri, Nov 21, 2008 at 1:55 PM, LS Cheng <exriscer@xxxxxxxxx> wrote:
>
>> I just setup a 10.2.0.4 2 nodes RAC on RHEL 4.4 running right now with
>> these disks and primary partitions:
>>
>>
>> fdisk -l | grep "\/dev\/sd[a-z]1"
>>
>> /dev/sda1 * 1 2611 20972826 fd Linux raid
>> autodetect
>> /dev/sdb1 * 1 2611 20972826 fd Linux raid
>> autodetect
>> /dev/sdc1 2 26109 209707008 83 Linux
>> /dev/sdd1 2 26109 209707008 83 Linux
>> /dev/sde1 8193 262144 253952 83 Linux
>> /dev/sdf1 117 7437 516096 83 Linux
>> /dev/sdg1 8193 262144 253952 83 Linux
>> /dev/sdh1 8193 262144 253952 83 Linux
>> /dev/sdi1 117 7437 516096 83 Linux
>> /dev/sdj1 2 26109 209707008 83 Linux
>> /dev/sdk1 2 26109 209707008 83 Linux
>> /dev/sdl1 1 16810 135026293+ 83 Linux
>>
>>
>> You can have many primary partitions just that you can have up to 4 per
>> disk (that is per lun in your case)
>>
>> Thanks
>>
>> --
>> LSC
>>
>>
>>
>> On Fri, Nov 21, 2008 at 9:28 AM, hrishy <hrishys@xxxxxxxxxxx> wrote:
>>
>>> Hi
>>>
>>> I am planning to use ASM and following diskgroups
>>> 1)DataDg
>>> 2)redoDg1
>>> 3)redoDg2
>>> 4)flashDg
>>> I have 4 Usable Luns from the SAN that are presented to the host o/s
>>> which is rhel 5
>>>
>>> I have already created 3 primary partitions on Linux
>>> 1)MBR
>>> 2)root
>>> 3)home
>>> These partitions are under Linux LVM(Logical Volume Manager)
>>>
>>> since BIOS supports only 4 primary partitions
>>> how can i use the 4 usable luns.
>>>
>>> should i be creating a extended partitions on the LUNS that are presented
>>> to the host operating system
>>>
>>> regards
>>> Hrishy
>>>
>>>
>>>
>>>
>>> --
>>> //www.freelists.org/webpage/oracle-l
>>>
>>>
>>>
>>
>
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