query version

check IO of LUN

scanning LUN

the host switch

under CLI check RAID LUN state, whether if it is abnormal

in storage debug mode, through the command of iostat –x –d 1 to check IO of storage system,

the average service time of some disk (svctm) over a period of time is obviously more than other disk, %util is close to 100%, and other disk are free, can judge the hard disk performance

on host side check LUN IO state under multipath

check the link state in host side and ISM storage interface

copy divided into synchronous replication and remote replication

copy divided into asynchronous replication and remote replication

copy divided in to inside this array replication and remote replication

copy divided into synchronous replication and asynchronous replication

check storage RAID LUN statem, if it is normal

check storage physical hard disk read and write state, if it is normal

check FC or iSCSI link state, if it is normal

login array user name and password

designated IP address discovery, which shows finding equipment according to the specified IP address of the equipment management network port

same subnet discovery, which shows that the search range is the user's specify IP address subnet

designated IP addresses discovery, which shows finding equipment according to the specified IP addresses of the equipment management network port

the specified mask discovery, which shows that search range is the user's defined the address network segment of specified mask

True

False

True

False

timing snapshot in stopped state

the same source LUN has multiple snapshots at the same time roll back

remote copy of main LUN can snapshot rollback

WORM state of source LUN in read-only state rollback

IP can't be connected

port restriction

VLAN Set is not reasonable

FC port lack of light power

component redundancy

hot standby dis technology

cache mirroring technology

smart prefetching technique

True

False

parallel link

cross link

FC link

iSCSI link

with the increase of striping depth, IOPS random write first don't increase, after arrive to a certain degree, IOPS random write will continue increasing

with the increase of striping depth, IOPS random write first will continue to increase, after arrive to a certain degree, IOPS random write can achieve stability

with the increase of striping depth, IOPS random write first will continue to increase, after arrive to a certain degree, IOPS random write will continue decreasing

with the increase of striping depth, IOPS random write first will continue to increase, after arrive to a certain degree, IOPS random write will still continue increasing

the source LUN failure

target LUN failure

link failures

there is insufficient space on the resource pool

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

True

False

topological structure of FC-AL is network, topological structure of of FC-SW is circular

FC-AL use AL-PA query equipment, FC-SW use Name Server query equipment

when there is new equipment join in, FC-AL need to interrupt network, FC-SW don't need to

interrupt the network

FC-AL through the hub as connection device, FC-SW optical switches as connected devices

wide port is composed of multiple phy

SAS address of each phy is made up the wide port is the same

port connected with wide port is not wide port

wide bandwidth is the sum of the each phy bandwidth

lack of sdb3 and sdb4, there is problem in disk partition table, should be restored partition table

the disk only has a primary partition

the disk has six logical partitions

the disk has seven logical partitions

Multiple points can communicate at the same time

each node failure is independent, single node failure will not affect the other nodes

devices share the bandwidth

support multiple transmission rate at the same time

True

False

stmsboot -e

stmsboot -u

stmsboot -d

stmsboot -L

in Debug_information directory, the most important information is message and SES_log

log_reset.txt record system restart times and reasons

log_debug.txt record system kernel log information

log_restart.txt record system restart times and reasons

True

False

the disk

CD-ROM

the tape

Switches

True

False

cat /etc/iscsi/initiatornamE. iscsi

iscsiadm -m node

iscsiadm list initiator-node

cfgadm

True

False

most can add 1 subordinate LUN

most can add 2 subordinate LUN

most can add 4 subordinate LUN

random add subordinate LUN

True

False

host - > SAN network - > storage system controller - > disk storage system

disk storage system - > storage system controller - > SAN network - > host

disk storage system - > SAN network - > storage system controller - > host

host - > storage system controller - > SAN network - > disk storage system

iometer support graphical configuration interface

iometer is mainly used to test the performance of file system

iozone can only use the command line configure interface

iozone is mainly used to test the performance of block device

A FC 300GB disk set to global hot spare disk

A SATA 1TB disk set to global hot spare disk

A FC 300GB disk and a SATA 1TB disk set to global hot spare disk, respectively.

In this configuration, this device cannot configure global hot sparE.

True

False

the source LUN writing strategy write-through

target LUN writes policy write-back not mirror

link failures

there is insufficient space on the resource pool

True

False

True

False

The subsequent releases of both S5000V1R5 and S5000TV1R1 can achieve a smooth upgrade, no need to upgrade the intermediate version

S5000TV1R1 upgrade to V1R5, need to upgrade to the V1R2 first, then upgrade to V1R5, directly from V1R1 upgrade to V1R5 may cause the DB loss, management port IP, log, license loss and other unusual problems

before upgrade, need to backup the DB, system configuration information and system log

before upgrade, don't have to check the version supporting table and manual of the version, because the system support version detection