Md3800i not accessible from some nodes

[NdK73]

Hello all.

I just added an MD3800i (ISCSI) to my cluster.
I configured it to not require authentication, to rule out possible problems.
The first node sees it and can access the LUN, but the other two nodes seems to be unable to see the LUN.

Is there something I could be missing? MD38xx admin software seems doesn't allow for definition of ACLs (like the host groups in MD32xx), but maybe I'm overlooking something?

Tks.

 

[NdK73]

Here's what I find in dmesg after a reboot:

Loading iSCSI transport class v2.0-870.
iscsi: registered transport (tcp)
iscsi: registered transport (iser)
scsi5 : iSCSI Initiator over TCP/IP
scsi6 : iSCSI Initiator over TCP/IP
scsi7 : iSCSI Initiator over TCP/IP
scsi8 : iSCSI Initiator over TCP/IP
scsi 5:0:0:0: Direct-Access     DELL     MD38xxi          0810 PQ: 1 ANSI: 5
scsi 6:0:0:0: Direct-Access     DELL     MD38xxi          0810 PQ: 1 ANSI: 5
scsi 7:0:0:0: Direct-Access     DELL     MD38xxi          0810 PQ: 1 ANSI: 5
scsi 8:0:0:0: Direct-Access     DELL     MD38xxi          0810 PQ: 1 ANSI: 5
scsi 5:0:0:0: rdac: LUN 0 (IOSHIP) (unowned)
scsi 5:0:0:0: Attached scsi generic sg8 type 0
scsi 7:0:0:0: rdac: LUN 0 (IOSHIP) (unowned)
scsi 7:0:0:0: Attached scsi generic sg9 type 0
scsi 6:0:0:0: rdac: LUN 0 (IOSHIP) (unowned)
scsi 6:0:0:0: Attached scsi generic sg10 type 0
scsi 8:0:0:0: rdac: LUN 0 (IOSHIP) (unowned)
scsi 8:0:0:0: Attached scsi generic sg11 type 0
scsi 5:0:0:31: Direct-Access     DELL     Universal Xport  0810 PQ: 0 ANSI: 5
scsi 5:0:0:31: Attached scsi generic sg12 type 0
scsi 7:0:0:31: Direct-Access     DELL     Universal Xport  0810 PQ: 0 ANSI: 5
scsi 7:0:0:31: Attached scsi generic sg13 type 0
scsi 6:0:0:31: Direct-Access     DELL     Universal Xport  0810 PQ: 0 ANSI: 5
scsi 8:0:0:31: Direct-Access     DELL     Universal Xport  0810 PQ: 0 ANSI: 5
scsi 6:0:0:31: Attached scsi generic sg14 type 0
scsi 8:0:0:31: Attached scsi generic sg15 type 0
SCTP: Hash tables configured (established 65536 bind 65536)

The sessions seems OK:

# service open-iscsi status
Current active iSCSI sessions:
tcp: [1] 192.168.1.23:3260,2 iqn.1984-05.com.dell:powervault.md3800i.600a0980005850b500000000540a410c
tcp: [2] 192.168.1.21:3260,1 iqn.1984-05.com.dell:powervault.md3800i.600a0980005850b500000000540a410c
tcp: [3] 192.168.1.24:3260,2 iqn.1984-05.com.dell:powervault.md3800i.600a0980005850b500000000540a410c
tcp: [4] 192.168.1.22:3260,1 iqn.1984-05.com.dell:powervault.md3800i.600a0980005850b500000000540a410c

The message I got from the node where it's working is a bit different and actually sees the LUN:

scsi11 : iSCSI Initiator over TCP/IP
scsi 11:0:0:0: Direct-Access     DELL     MD38xxi          0810 PQ: 0 ANSI: 5
scsi 11:0:0:0: rdac: LUN 0 (IOSHIP) (owned)
sd 11:0:0:0: Attached scsi generic sg7 type 0
sd 11:0:0:0: [sdh] 70316863488 512-byte logical blocks: (36.0 TB/32.7 TiB)
scsi 11:0:0:31: Direct-Access     DELL     Universal Xport  0810 PQ: 0 ANSI: 5
scsi 11:0:0:31: Attached scsi generic sg8 type 0

# service open-iscsi status 
Current active iSCSI sessions:
tcp: [1] 192.168.1.21:3260,1 iqn.1984-05.com.dell:powervault.md3800i.600a0980005850b500000000540a410c

(actually it has been connected when there was only one cable to the MD3800 hence the single session, but that shouldn't impact LUN's visibility).

Wondering what those "unowned" means...