ASM -- Is it Mirrored Stripes or Striped Mirrors

From: Jagjeet Singh <jagjeet.malhi_at_gmail.com>
Date: 28 Nov 2006 23:22:38 -0800
Message-ID: <1164784958.128178.253370@14g2000cws.googlegroups.com>

Hi,

I am trying to understand about ASM striping and mirroring mechanism.

As It is confirm that I does both the things but I want to know whether it does 1+0 or 0+1

like First it does mirroring and then striping or striping and then mirroring.

Like If I create a normal redundancy diskgroup using

create diskgroup dg normal redundancy
failgroup f1 disk 'disk1','disk2'
failgroup f2 disk 'disk3,disk4';

And as per RAID 1+0

                               DG


                                |

          F1 --------------------------------------F2
           |                                      |
        Disk1, Disk2                         Disk3,Disk4

And suppose 2 blocks [ b1 and b2 ] are occupied or get extended in this diskgroup then would it be speeded like

                               DG


                                |

       F1  ----------------------------------------- F2
           |                                          |
        Disk1, Disk2                           Disk3,Disk4

          b1      b1                                  b2 .b2

                               DG


                                |

       F1  ----------------------------------------- F2
           |                                         |
        Disk1, Disk2                                Disk3,Disk4

          b1      b2                                b1 .b2

Regards,
Jagjeet Singh Received on Wed Nov 29 2006 - 01:22:38 CST