To troubleshoot a possible hardware problem, you consider moving all disk drives from one Exadata storage server to a replacement chassis. You must contain storage availability while performing…

Question

Options

• AThe existence of an external redundancy ASM diskgroup
• BThe existence of a normal redundancy ASM diskgroup
• CThe existence of an ASM diskgroup with the repair_time attribute set to 0.
• DThe existence of an ASM diskgroup with its compatible.asm attribute set to 10.2.0.0.0
• EOffline or inactive celldisks in another Exadata server

• A
  81% (48)
• B
  5% (3)
• C
  10% (6)
• E
  3% (2)

Explanation

A: If you want Oracle ASM to mirror files, specify the redundancy level as NORMAL REDUNDANCY (2- way mirroring by default for most file types) or HIGH REDUNDANCY (3-way mirroring for all files). You specify EXTERNAL REDUNDANCY if you do not want mirroring by Oracle ASM. For example, you might choose EXTERNAL REDUNDANCY if you want to use storage array protection features. D: Restoring the redundancy of an Oracle ASM disk group after a transient disk path failure can be time consuming. This is especially true if the recovery process requires rebuilding an entire Oracle ASM failure group. Oracle ASM fast mirror resync significantly reduces the time to resynchronize a failed disk in such situations. When you replace the failed disk, Oracle ASM can quickly resynchronize the Oracle ASM disk extents. To use this feature, the disk group compatibility attributes must be set to 11.1 or higher. Not C: You can set the DISK_REPAIR_TIME disk group attribute to delay the drop operation by specifying a time interval to repair the disk and bring it back online. * The redundancy levels are: / External redundancy Oracle ASM does not provide mirroring redundancy and relies on the storage system to provide RAID functionality. Any write error cause a forced dismount of the disk group. All disks must be located to successfully mount the disk group. / Normal redundancy Oracle ASM provides two-way mirroring by default, which means that all files are mirrored so that there are two copies of every extent. A loss of one Oracle ASM disk is tolerated. You can optionally choose three-way or unprotected mirroring. / High redundancy Oracle ASM provides triple mirroring by default. A loss of two Oracle ASM disks in different failure groups is tolerated.

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