AFF A200 - single path ha

[nemar07]

Hi Community,

We have bought month ago AFF-A200 array with 12 internal disks (no additional shelves) . Engineer that cabled this array on site, cabled it wrong (SAS Cables)

Controller 1 0a to Controller 2 0a

Controller 1 0b to Controller 2 0b

Should be 0a to 0b and 0b to 0a.

No errors at all on SysMGR, sysconfig -a shows it as 

System Storage Configuration: Single-Path HA

As it has only internal disks, can it be recabled nondisruptively ?

Thanks 

[christsai · Accepted solution]

Hi nemar07

Yes, you can recable SAS cable nondisruptively , if you only have internal disks and dont have any additional shelves.

[AaronLim]

do you even need the SAS cabling on A220? with single path HA, will it affect disk failover to different controllers? Thx. 

[andris]

If a FAS or AFF controller with embedded storage has no additional external SAS storage shelves, the Node1 0a -> Node2 0b and Node1 0b -> Node1 0a SAS cable connections are a minor reliability enhancement to give you multipath HA connectivity for that internal shelf of drives. But, the internal path to the drives is deemed highly reliable - In fact, NetApp has stopped including the 2 x SAS cables for systems with only internal storage due to this fact.