Multipath disks detected on a -A backplane

Notice: Page may contain affiliate links for which we may earn a small commission through services like Amazon Affiliates or Skimlinks.

Rand__

Well-Known Member
Mar 6, 2014
6,626
1,767
113
Does anyone know why FreeNas (latest) would see half my drives as multipath disks on a -A backplane?

I have 13 drives in it ( SAS3, all the same, 12 HGST,1 Sun) and about half of them have been detected as multipath, the other half not...

Can't do anything with the degraded multipath disks ... so want to get rid of that.
No idea why that would happen on a non Expander backplane in the first place...

Code:
perl disklist.pl
partition  label                                       zpool         device  disk                   size  type  serial                        rpm  sas-location     multipath         multipath-mode  multipath-state
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
da0p2      gptid/f6566c10-2517-11e6-8514-000c29e88918  freenas-boot  da0     VMware Virtual disk      68  SSD   (null)                          0
                                                                     da2     HGST HBCAC2DH4SUN800G   800  SSD   001640J41XNX        41V01XNX    0
                                                                     da7     HGST HUSMM3280ASS204    800  SSD   41V07MAX                        0  SAS3224(1):1#1
                                                                     da8     HGST HUSMM3280ASS204    800  SSD   41V06W9X                        0  SAS3224(1):1#2
                                                                     da9     HGST HUSMM3280ASS204    800  SSD   41V07NVX                        0  SAS3224(1):1#3
                                                                     da10    HGST HUSMM3280ASS204    800  SSD   41V07BTX                        0  SAS3224(1):1#8
                                                                     da11    HGST HUSMM3280ASS204    800  SSD   41V07JYX                        0  SAS3224(1):1#9
                                                                     da3     HGST HUSMM3280ASS204    800  SSD   41V07NWX                        0  SAS3224(0):1#4   multipath/disk4   ACTIVE          DEGRADED
                                                                     da4     HGST HUSMM3280ASS204    800  SSD   41V07P3X                        0  SAS3224(0):1#5   multipath/disk6   ACTIVE          DEGRADED
                                                                     da5     HGST HUSMM3280ASS204    800  SSD   41V07GYX                        0  SAS3224(0):1#6   multipath/disk7   ACTIVE          DEGRADED
                                                                     da1     HGST HUSMM3280ASS204    800  SSD   41V06W7X                        0  SAS3224(0):1#0   multipath/disk16  ACTIVE          DEGRADED
                                                                     da6     HGST HUSMM3280ASS204    800  SSD   41V07B5X                        0  SAS3224(0):1#7   multipath/disk18  ACTIVE          DEGRADED
                                                                     da13    HGST HUSMM3280ASS204    800  SSD   41V07NXX                        0  SAS3224(1):1#11  multipath/disk35  ACTIVE          DEGRADED
                                                                     da12    HGST HUSMM3280ASS204    800  SSD   41V07P1X                        0  SAS3224(1):1#10  multipath/disk36  ACTIVE          DEGRADED
 

Rand__

Well-Known Member
Mar 6, 2014
6,626
1,767
113
Hm maybe it was because I had them in an expander system before... but not all old disks seem to have been affected... weird
Found a fix though:

Code:
 gmultipath list
Geom name: disk35
Type: AUTOMATIC
Mode: Active/Passive
UUID: 204fcff3-9fe8-11e9-a0f7-0050568b85f8
State: DEGRADED
Providers:
1. Name: multipath/disk35
   Mediasize: 800166075904 (745G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r0w0e0
   State: DEGRADED
Consumers:
1. Name: da13
   Mediasize: 800166076416 (745G)
   Sectorsize: 512
   Stripesize: 4096
   Stripeoffset: 0
   Mode: r1w1e1
   State: ACTIVE

 gmultipath destroy disk35

 perl disklist.pl
partition  label                                       zpool         device  disk                   size  type  serial                        rpm  sas-location
------------------------------------------------------------------------------------------------------------------------------------------------------------------
da0p2      gptid/f6566c10-2517-11e6-8514-000c29e88918  freenas-boot  da0     VMware Virtual disk      68  SSD   (null)                          0
                                                                     da1     HGST HUSMM3280ASS204    800  SSD   41V06W7X                        0  SAS3224(0):1#0
                                                                     da2     HGST HBCAC2DH4SUN800G   800  SSD   001640J41XNX        41V01XNX    0
                                                                     da3     HGST HUSMM3280ASS204    800  SSD   41V07NWX                        0  SAS3224(0):1#4
                                                                     da4     HGST HUSMM3280ASS204    800  SSD   41V07P3X                        0  SAS3224(0):1#5
                                                                     da5     HGST HUSMM3280ASS204    800  SSD   41V07GYX                        0  SAS3224(0):1#6
                                                                     da6     HGST HUSMM3280ASS204    800  SSD   41V07B5X                        0  SAS3224(0):1#7
                                                                     da7     HGST HUSMM3280ASS204    800  SSD   41V06W9X                        0  SAS3224(0):1#3
                                                                     da8     HGST HUSMM3280ASS204    800  SSD   41V07NVX                        0  SAS3224(0):1#8
                                                                     da9     HGST HUSMM3280ASS204    800  SSD   41V07MAX                        0  SAS3224(0):1#2
                                                                     da10    HGST HUSMM3280ASS204    800  SSD   41V07BTX                        0  SAS3224(1):1#8
                                                                     da11    HGST HUSMM3280ASS204    800  SSD   41V07JYX                        0  SAS3224(1):1#9
                                                                     da12    HGST HUSMM3280ASS204    800  SSD   41V07P1X                        0  SAS3224(1):1#10
                                                                     da13    HGST HUSMM3280ASS204    800  SSD   41V07NXX                        0  SAS3224(1):1#11
 
Last edited:

Rand__

Well-Known Member
Mar 6, 2014
6,626
1,767
113
Hm, it's still weird since not all of the drives of the old installation were no multipath enabled (eg not the SUN disk da2), but one of the new ones instead.
O/c I cloned the old VM, so maybe FN had some remains of that multipath config in its bowels and just picked 7 (random /how ever identified) disks instead.
But I am old enough that I don't need to solve every riddle I encounter, so happy its working now :)