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技术知识

EMC VMAX 标识故障驱动器的 Location

Having completed a VMAX ‘Health Check’ through ‘Unisphere’ it has been highlighted that a drive has failed:
 

ID_Failed_Drive1

Running the command symdisk list -failed will display the details of the failed disk (-v for more detail):
 

ID_Failed_Drive2

You can also check if the failed disk has been spared out by issuing the command symdisk list -isspare:
 

ID_Failed_Drive3

Determining the Drive Location based on the information provided:
 

ID_Failed_Drive5

‘Ident/Symb’ = ‘9B’ identifies the Director and the MOD that the drive is connected to at the Back-End. Thus we can gather at this stage that the drive is connected to Director 9 (Engine5).
On both directors of Engine5(9&10) there are two Back-End IO modules (MOD0 & MOD1) per director, MOD0 has connections A0,A1,B0,B1 and MOD1 has connections C0,C1,D0,D1. MOD0 on both the even and odd directors connect to DAE’s 9,13,10,14 with MOD1 on both directors connecting to DAE’s 11,15,12,16. The 8 Redundant Loops on Engine5 connect up as follows:
DAE9=LOOP0 (A0)
DAE10=LOOP2 (B0)
DAE11=LOOP4 (C0)
DAE12=LOOP6 (D0)
DAE13=LOOP1 (A1)
DAE14=LOOP3 (B1)
DAE15=LOOP5 (C1)
DAE16=LOOP7 (D1)

‘Int’ = ‘C’ stands for interface, this is the port used on the MOD.
C = Port 0
D = Port 1
Thus far we can determine that the Drive is located on LOOP2 (9B 0).
 

ID_Failed_Drive7

‘TID’ = ‘1’ refers to the target ID, or the disk location on the Loop.

From all this information we can determine that the location of the Failed drive (‘9B 0 1’) is ‘Drive Bay-1A, DAE-10, Disk-01’:
 

ID_Failed_Drive4

If you have access to SymmWin then you can Toggle the disk LED:

ID_Failed_Drive6
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