[dm-devel] Missing path

[Domenico Viggiani]

After adding a LUN from a EMC Clariion CX700 to a system with already many
of these, I noticed that multipath doesn't see a path:

360060160eb241700284f88a159efdc11
[size=450 GB][features="1 queue_if_no_path"][hwhandler="1 emc"]
\_ round-robin 0 [prio=1][enabled]
 \_ 1:0:0:70  sdbo 68:32  [active][ready]
\_ round-robin 0 [enabled]
 \_ 0:0:3:70  sdbn 68:16  [active][ready]
 \_ 1:0:1:70  sdbp 68:48  [active][ready]

>From SCSI layer, it is OK:

Host: scsi0 Channel: 00 Id: 02 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi0 Channel: 00 Id: 03 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi1 Channel: 00 Id: 00 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04
Host: scsi1 Channel: 00 Id: 01 Lun: 70
  Vendor: DGC      Model: RAID 5           Rev: 0219
  Type:   Direct-Access                    ANSI SCSI revision: 04

but one device is missing under /dev:

brw-rw----  1 root disk 68,  16 Mar 11 14:44 /dev/sdbn
brw-rw----  1 root disk 68,  32 Mar 11 14:45 /dev/sdbo
brw-rw----  1 root disk 68,  48 Mar 11 14:45 /dev/sdbp

How can I fix this?

Thanks in advance
-- 
Domenico Viggiani