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Exam
Code: E10-001
Exam Name: Information Storage and Management Exam Version 2
Free One year updates to match real exam scenarios, 100% pass and refund Warranty.
E10-001 Test Answers Total Q&A: 344 Questions and Answers
Last Update: 07-20,2015
Exam Name: Information Storage and Management Exam Version 2
Free One year updates to match real exam scenarios, 100% pass and refund Warranty.
E10-001 Test Answers Total Q&A: 344 Questions and Answers
Last Update: 07-20,2015
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NO.1 Which NAS backup environment transfers data to be backed up over a private backup
network?
A. NDMP three-way
B. NDMP two-way
C. Server-based
D. Serverless
Answer: A
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NO.2 What is a characteristic of asynchronous remote replication?
A. Only the last update is transmitted if there are multiple writes to the same location in the buffer
B. Writes are committed to the target before being committed to the source
C. Reads are always serviced from the target replica
D. Distance between the two sites is restricted to less than 200 km
Answer: A
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NO.3 What is an element of a NAS head?
A. Control station
B. Storage controller
C. Data accepted in real time
D. Optimized operating system
Answer: D
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Explanation:
Components of NAS A NAS device has two key components: NAS head and storage. In some NAS
implementations, the storage could be external to the NAS device and shared with other hosts. The
NAS head includes the following components: CPU and memory One or more network interface cards
(NICs), which provide connectivity to the client network. Examples of network protocols supported by
NIC include Gigabit Ethernet, Fast Ethernet, ATM, and Fiber Distributed Data Interface (FDDI) An
optimized operating system for managing the NAS functionality. It translates file level requests into
block-storage requests and further converts the data supplied at the block level to file data NFS, CIFS,
and other protocols for file sharing Industry-standard storage protocols and ports to connect and
manage physical disk resources The NAS environment includes clients accessing a NAS device over an
IP network using file sharing protocols.
EMC E10-001 Student Resource Guide. Module 7: Network-Attached Storage (NAS)
NO.4 Refer to Exhibit:
Which type of cloud deployment model is represented in the exhibit?
A. Public
B. Private
C. Community
D. Hybrid
Answer: A
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NO.5 In a virtualized environment, which method enables a virtual machine to be rolled back in case
of a logical corruption to the virtual machine?
A. Virtual volume replication
B. VM snapshot
C. Storage array volume replication
D. VM clone
Answer: B
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NO.6 In a copy on first access (CoFA) technique, when is data copied from the source to the target?
A. All writes are issued to a location on the source
B. All writes are issued to a location on the target
C. A read or write is issued for the first time to a location on the target
D. A read is issued for the first time from a location on the source
Answer: C
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NO.7 How is the internal transfer rate of disk drives defined?
A. Speed at which data moves from the read/write head to the platter
B. Speed at which data moves from a platter's surface to the internal buffer
C. Speed at which data moves from internal buffer to the host interface
D. Speed at which data moves from the innermost cylinder to the read/write head
Answer: B
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NO.8 Which process minimizes the exposure to a loss of uncommitted cached data when there is a
power failure?
A. Cache vaulting
B. Cache mirroring
C. Low watermarking
D. Prefetching
Answer: A
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Explanation:
Cache Data Protection Cache is volatile memory, so a power failure or any kind of cache failure will
cause loss of the data that is not yet committed to the disk. This risk of losing uncommitted data held
in cache can be mitigated using cache mirroring and cache vaulting:
Cache mirroring: Each write to cache is held in two different memory locations on two independent
memory cards. If a cache failure occurs, the write data will still be safe in the mirrored location and
can be committed to the disk. Reads are staged from the disk to the cache; therefore, if a cache
failure occurs, the data can still be accessed from the disk. Because only writes are mirrored, this
method results in better utilization of the available cache. In cache mirroring approaches, the
problem of maintaining cache coherency is introduced. Cache coherency means that data in two
different cache locations must be identical at all times. It is the responsibility of the array operating
environment to ensure coherency. Cache vaulting: The risk of data loss due to power failure can be
addressed in various ways: powering the memory with a battery until the AC power is restored or
using battery power to write the cache content to the disk. If an extended power failure occurs, using
batteries is not a viable option. This is because in intelligent storage systems, large amounts of data
might need to be committed to numerous disks, and batteries might not provide power for sufficient
time to write each piece of data to its intended disk. Therefore, storage vendors use a set of physical
disks to dump the contents of cache during power failure. This is called cache vaulting and the disks
are called vault drives. When power is restored, data from these disks is written back to write cache
and then written to the intended disks. EMC E10-001 Student Resource Guide. Module 4: Intelligent
Storage System
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