Multipaths behavior

[Brezlord]

Hi all, I'm using EMC KTN-STL3 15 bay enclosures which are connected up via 2 SAS links and the work great. Under Linux if you use an EMC SATA to SAS interposer the SATA disk shows up with 2 paths as it should. Under TrueNAS they do not mulipath. Is this a shortcoming / incompatibility of FreeBSD or is this feature disabled under TrueNAS core?

 

[sretalla]

What is gmultipath list telling you?

Although you would probably know if it was being used since your disks would be something like disk1, disk2 instead of da0, da1...

 

[Brezlord]

Thanks for your reply. gmultipath list only shows the SAS disks. sas2ircu 1 display shows the SATA disk twice.

Code:

Device is a Hard disk
  Enclosure #                             : 2
  Slot #                                  : 102
  SAS Address                             : 5006048-0-5833-b609
  State                                   : Ready (RDY)
  Size (in MB)/(in sectors)               : 953869/1953525167
  Manufacturer                            : ATA
  Model Number                            : WDC WD1003FZEX-0
  Firmware Revision                       : 1A01
  Serial No                               : WDWCC6Y6FERU2J
  GUID                                    : N/A
  Protocol                                : SATA
  Drive Type                              : SATA_HDD
 
Device is a Hard disk
  Enclosure #                             : 3
  Slot #                                  : 102
  SAS Address                             : 5006048-0-6802-4614
  State                                   : Ready (RDY)
  Size (in MB)/(in sectors)               : 953869/1953525167
  Manufacturer                            : ATA
  Model Number                            : WDC WD1003FZEX-0
  Firmware Revision                       : 1A01
  Serial No                               : WDWCC6Y6FERU2J
  GUID                                    : N/A
  Protocol                                : SATA
  Drive Type                              : SATA_HDD

 

[sretalla]

In my experience it has always intervened automatically to do things I didn't want... I guess you might look into using gmultipath to set it up the way you want...