Re: 4 Primary partitions limitations

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_at_gmail.com>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_at_opitz-consulting.ch

> http://www.opitz-consulting.ch

>

> OCP 9i/10g SCSA SCNA

> =========================

>

>

>

> On Fri, Nov 21, 2008 at 1:55 PM, LS Cheng <exriscer_at_gmail.com> 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_at_yahoo.co.uk> 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

>>>

>>>

>>>

>>>

>>> --

>>> http://www.freelists.org/webpage/oracle-l

>>>

>>>

>>>

>>

>


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