Which of the following scenarios can preliminarily positioning storage array controller is abnormal or fault?(Select 2 Answers)

after the storage array is powered on, the fault indicator light of the front panel flashes orange
in the case of serial port cable and serial port parameters without exception, no printed information in the controller serial
controller state indicator light is red; it has inability to access the storage system
storage is powered on, front panel system failure indicator light red show that the controller must be failure

Answer(s): B,C

SAS domain is composed of SAS Expander and SAS terminal equipment, and connect through the SAS bus.

Answer(s): A

Which of the following description of module function within SAN storage array system is correct? (Select 2 Answers)

IBS: multipath control module interaction with the host multipath, responsible for sending the read/write command to the appropriate controller
FC_front: specific processing the transport layer of host interface protocols, for example: FC, SCSI (iSCSI), SAS
DB: management and save the system configuration data
HMP: responsible for the communication management between the controller (mainly PCIe)

Answer(s): B,C

Which of the following description of storage system performance tuning is correct?

must be tuned under online business
the tuning of storage system can be done with the host alone, should not influence each other
storage system's performance tuning belongs to systemic tuning, need to understand customer IO model, the size of the business, comprehensive analysis of the server and storage-side resources utilization, focus on storage RAID level, stripe depth, the distribution of LUN mapping to host, etc
None of the above is correct

Answer(s): C

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