RE: 4 Primary partitions limitations
- From: "Bort, Guillermo" <guillermo.bort@xxxxxxx>
- To: <hrishys@xxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 21 Nov 2008 05:08:02 -0600
If I understand this correctly, the luns will be presented a different 'disks'
to Linux, such as /dev/sdb, /dev/sdc, etc. in such case, you can create up to
four primary partitions in each of those 'disks'. As for ASM, since it uses raw
devices on linux, you can create extended partitions and it works fine.
I have a RHEL4U6 with Oracle10g (10.2.0.4). Database is completely in ASM
(except for a few testing datafiles) and disk configuration due to hardware
restrictions is:
/dev/sda1 /boot
/dev/sda2 /
/dev/sda3 /var
/dev/sda4 extended
/dev/sda5 /usr
/dev/sda6 /var/lib/vmware(something)
/dev/sda7 /u01
/dev/sda8 raw
/dev/sda9 raw
/dev/sda10 swap
So, I guess this is all aimed to show that while you certainly *can* have
extended partitions as ASM Diskgroups, it's not necessary to create extended
partition on secondary disks.
HTH
Guillermo Alan Bort
DBA / DBA Main Team
EDS, an HP company
ITO
Arias 1851
Ciudad Autonoma de Buenos Aires (C1429DXC)
Argentina
Tel: +54 11 4704-3132
E-mail: guillermo.bort@xxxxxxx
We deliver on our commitments
so you can deliver on yours.
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of hrishy
Sent: Friday, November 21, 2008 6:28 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: 4 Primary partitions limitations
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
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