[Bug 824790] Re: IBM DS3400 Will Not Bring Up Second Path

[Peter Petrakis]

** Changed in: multipath-tools (Ubuntu)
     Assignee: Ubuntu Storage Development Team (ubuntu-storage-dev) => (unassigned)

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Title:
   IBM DS3400 Will Not Bring Up Second Path

Status in “multipath-tools” package in Ubuntu:
  Invalid

Bug description:
  System configuration is an IBM HS21 blade connected to an IBM DS3400 SAN.
  The system is running Ubuntu 10.10 with multipath-tools version: 0.4.8-14ubuntu4.10.10.2
  The Ubuntu OS is installed on an internal disk and not the SAN.

  multipathd> show paths 
  hcil dev dev_t pri dm_st chk_st next_check 
  0:0:0:0 sda 8:0 0 [undef][ghost] [orphan] 
  1:0:0:0 sdb 8:16 3 [undef][ready] [orphan] 
  2:1:1:0 sdc 8:32 1 [undef][ready] [orphan] 

  It appears everything is working but multipathd cant define the maps,
  a multipath -v 6 shows

  "360080e50001b5f4c00003d284e37e864: domap (0) failure for
  create/reload map"

  That is the uuid of the path associated with /sda and /sdb but it cant
  seem to create it.

  libdevmapper: ioctl/libdm-iface.c(1740): dm reload 360080e50001b5f4c00003d284e37e864 OF [16384] 
  libdevmapper: ioctl/libdm-iface.c(1757): device-mapper: reload ioctl failed: Invalid argument 
  libdevmapper: ioctl/libdm-iface.c(1740): dm remove 360080e50001b5f4c00003d284e37e864 NF [16384] 
  libdevmapper: libdm-common.c(799): 360080e50001b5f4c00003d284e37e864: Stacking NODE_DEL (replaces other stacked ops) 
  libdevmapper: ioctl/libdm-iface.c(1740): dm info 360080e50001b5f4c00003d284e37e864 NF [16384] 
  360080e50001b5f4c00003d284e37e864: domap (0) failure for create/reload map 
  360080e50001b5f4c00003d284e37e864: remove multipath map 
  sda: orphaned 
  sdb: orphaned

  The SAN is on devices sda and sdb.  The internal root disk is sdc.
  The device sda is reporting I/O errors in syslog because multipath
  cannot bring up the path.

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