单项选择题
All of the following RAID levels are available on an IBM System Storage DS8700 and DS8800 with the exception of:（）
A.RAID 1
B.RAID 5
C.RAID 6
D.RAID 10
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Which of the following is a benefit of the IBM Long Term File System (LTFS)? （）
A. management of the library files
B. management of the encryption keys and archives
C. helps to reduce tape, file management and archive costs
D. helps to control the write speed matching on LTO-4 drives -
单项选择题
On both the IBM SAN764B and the IBM SAN384B Fiber Channel Directors, all of the followingSmall Form Pluggable plus (SFP+) optical transceivers are supported EXCEPT:（）
A. 1Gbps+
B. 2Gbps+
C. 4Gbps+
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A customer is currently using EMC disk. They are having an issue with the time it takes to complete a backup. What IBM tool can be used to show how much improvement can occur in the time it takes to backup the disk?（）
A. TCOnow!
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C. Batch Magic
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