Release Notes

19 Migrating an Oracle Database to Dell EMC SC Series Storage | CML1001
3.7.1 Oracle ASM
When the database uses Oracle ASM, the storage can be swapped out in the following sequence using ASM
online addition/removal and rebalance features:
1. New SC Series volumes are added to the existing disk groups and original volumes are dropped from
the disk groups at the same time with a single command.
2. Data is rebalanced automatically by ASM.
3. No application/database outage occurs during the operations.
4. Progress can be monitored by querying the V$ASM_OPERATION.
The Oracle ASM command utility (ASMCMD) is a Unix-like command utility provided with Oracle ASM
software. The ASMCMD cp command allows copying files between disk groups, ASM instances, and
operating systems. It might be used in the following scenarios:
• When copying files between disk groups
• When copying files between ASM instances of the same or different endian formats
• When copying files from disk groups to the OS or from the OS to disk groups, which allows file-
system-based data files to be migrated into ASM disk groups
• If the source consists of ASM files, ASM automatically converts the endian format when they are
written to the target ASM disk group
• If the source consists of non-ASM files and the target ASM disk group has different endian format, the
files must be copied or transferred to the target platform using other utilities such as the ones listed in
section 3.7.3, and then the files are converted
Note: OCR and SPFILE file types cannot be copied with the ASMCMD cp command. Use the ocrdump,
spcopy, or other database commands to copy these file types.
For more information on Oracle ASM, refer to Oracle Automatic Storage Management Administrator's Guide
on the Oracle Documentation Portal.
3.7.2 Linux LVM
When the database uses Linux LVM, the data on the LVM physical volume can be moved to a new volume
online using the following steps:
1. Use the pvcreate and vgextend commands to add new SC Series volumes to the existing LVM
volume group
2. Use the pvmove command to relocate the data online. For example:
pvmove /dev/mapper/LUN1 /dev/mapper/LUN2
3. Use the pvremove command to remove old volumes after migration is done.