Re: 11gR2 San Migration - OCR Disk Group

From: Ls Cheng <exriscer_at_gmail.com>
Date: Fri, 6 Apr 2012 20:15:04 +0200
Message-ID: <CAJ2-Qb9ChUje8Ge8b-fsJKRX_LbMM0AmN2mXFnMm2LZ8hQBZhw_at_mail.gmail.com>

Hi
I did this a year ago migrating OCR Disk Group from DS8000 to XIV SAN no downtime.

First add new disk for each failure group in OCRDATA Disk Group: alter diskgroup ocrdata add failgroup OCRDATA_0000 disk '/dev/rhdisk29' name OCRDATA_0004;
alter diskgroup ocrdata add failgroup OCRDATA_0001 disk '/dev/rhdisk30' name OCRDATA_0005;
alter diskgroup ocrdata add failgroup OCRDATA_0002 disk '/dev/rhdisk31' name OCRDATA_0006;

Second drop disk in OCRDATA (also checking voting disks location): bd1cpp:root/root#> /u01/grid/11.2.0.2/bin/crsctl query css votedisk

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------

1. ONLINE 429c50a1cb144f1bbff964bad247664d (/dev/asm_ocr_bd1_dsk1) [OCRDATA]
2. ONLINE 0e3d1c015ed44fe5bfa33b4d802abf46 (/dev/asm_ocr_bd1_dsk2) [OCRDATA]
3. ONLINE 421c5c9df8ac4feabf867753ed590b88 (/dev/asm_ocr_bd2_dsk1) [OCRDATA]

alter diskgroup ocrdata drop disk 'OCRDATA_0001'; bd1cpp:root/u01/app#> /u01/grid/11.2.0.2/bin/crsctl query css votedisk

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------

1. ONLINE 429c50a1cb144f1bbff964bad247664d (/dev/asm_ocr_bd1_dsk1) [OCRDATA]
2. ONLINE 421c5c9df8ac4feabf867753ed590b88 (/dev/asm_ocr_bd2_dsk1) [OCRDATA]
3. ONLINE 03bf1809585d4faebf03c2926580c144 (/dev/rhdisk30) [OCRDATA]

alter diskgroup ocrdata drop disk 'OCRDATA_0000'; bd1cpp:root/u01/app#> /u01/grid/11.2.0.2/bin/crsctl query css votedisk

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------

1. ONLINE 421c5c9df8ac4feabf867753ed590b88 (/dev/asm_ocr_bd2_dsk1) [OCRDATA]
2. ONLINE 03bf1809585d4faebf03c2926580c144 (/dev/rhdisk30) [OCRDATA]
3. ONLINE 60a296b270384fe9bf9aee104d363b02 (/dev/rhdisk29) [OCRDATA]

alter diskgroup ocrdata drop disk 'OCRDATA_0002'; bd1cpp:root/u01/app#> /u01/grid/11.2.0.2/bin/crsctl query css votedisk

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   03bf1809585d4faebf03c2926580c144 (/dev/rhdisk30) [OCRDATA]

 2. ONLINE 60a296b270384fe9bf9aee104d363b02 (/dev/rhdisk29) [OCRDATA]  3. ONLINE 5dccabe580bb4f24bf048b91e92f5ffc (/dev/rhdisk31) [OCRDATA]

Thanks

On Fri, Apr 6, 2012 at 4:35 PM, Jeff Thomas <dbmangler_at_gmail.com> wrote:

> Running 11.2.0.2.5 RAC on Linux x86. We are migrating to a new SAN.
> With respect to the OCR diskgroup, which is defined with 3 disks with
> normal redundancy, I do know how to migrate the OCR/voting files/ASM
> spfile to a new OCR diskgroup if need be.
> What I wonder if anyone has migrated the OCR diskgroup by simply adding the
> new disks and dropping the old ones? Is Oracle smart enough
> to copy the 3 voting files over to the new disks, so that's there no outage
> whatsoever when migrating to the new SAN?
>
> Best,
> Jeff
>
>
> --
> http://www.freelists.org/webpage/oracle-l
>
>
>

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Received on Fri Apr 06 2012 - 13:15:04 CDT