A customer is migrating from a DMX to a VMAX. To minimize the outage window Open Replicator hot pull has been selected to perform the migration. Which Open Replicator license is required and which array should it be applied to?
A. Open Replicator/LM on the VMAX.
B. Open Replicator/LM on the DMX.
C. Open Replicator/DM on the VMAX.
D. Open Replicator/DM on the DMX.
When does the ACOFW behavior apply in a TimeFinder/Snap environment?
A. Writes to protected tracks on the source device
B. Writes to protected tracks on the virtual device
C. All writes to the source device
D. All writes to the virtual device
What is the maximum data change rate for which you would recommend TimeFinder/Snap over TimeFinder/Clone as a local replication solution?
A. 10%
B. 50%
C. 70%
D. 30%
A customer has a pair of VMAX arrays configured to replicate thin devices at one site to thin devices at another site using SRDF/A. The customer wants to implement TimeFinder/Clone replication of the R1 device on the source array and asks you to confirm this is a supported configuration. What do you advise the customer?
A. Yes, it is supported.
B. It is supported only if the precopy option is used.
C. No, it is not supported.
D. It is supported only if composite groups are used.
An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array.
They ask you to explain how the TimeFinder/Clone Copy on First Write (COFW) mechanism on the new
VMAX array differs from their DMX-3 array.
What do you tell the customer?
A. The VMAX array uses asynchronous COFW and the DMX-3 array uses synchronous COFW.
B. Both the VMAX and DMX-3 arrays use synchronous COFW.
C. The VMAX array uses synchronous COFW and the DMX-3 array uses asynchronous COFW.
D. Both the VMAX and DMX-3 array use asynchronous COFW.
An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. A colleague advised them TimeFinder/Clone performance would improve on the VMAX due to changes to the Copy on First Write (COFW) mechanism. The customer asks you to explain how the COFW mechanism changed on the VMAX. What do you advise the customer?
A. Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.
B. Uses synchronous copy on first write (COFW), which has no COFW penalty.
C. Uses asynchronous copy on first write (ACOFW), which holds protected writes in cache.
D. Uses synchronous copy on first write (COFW), which completes protected writes in cache.
A customer has a pair of VMAX arrays configured to replicate thin devices at one site to thin devices at another site using SRDF/A. The customer wants to implement TimeFinder/Clone replication of the R2 device on the target array and asks you to confirm this is a supported configuration. What do you advise the customer?
A. Yes, it is supported.
B. It is supported only if composite groups are used.
C. It is supported only if the precopy option is used.
D. No, it is not supported.
When terminating a TimeFinder/Snap session, what is the effect on the ability to access the data on the VDEV?
A. A host mount is required to access the data on the virtual device.
B. The hold on the target device is removed while the data remains available.
C. The data is available to the host if a mount is issued with the force flag.
D. The data is no longer available on the virtual device.
What describes the difference between Asynchronous and Synchronous Copy on First Write (COFW)?
A. Asynchronous mode results in fewer disk operations during COFW.
B. Asynchronous results in a shorter host response time as there is no COFW penalty compared to Synchronous.
C. Asynchronous mode results in more disk operations during COFW.
D. Asynchronous and Synchronous mode result in similar host response time as both suffer the COFW penalty.
Your customer is interested in using Timefinder/Snap. You have determined there needs to be fifty save devices to handle the change rate for 125 virtual devices. The Save devices and the virtual devices are the same size. What should be recommended if source volume performance is a consideration?
A. Recommend using Timefinder/Clone
B. Spread the Save devices across as many DAs and disks as possible
C. Recommend using RAID6 for the Save devices
D. Allocate enough disks to handle the change rate
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