Promise Vtrak Ex30 and Multipathing under Linux

219 Views
Last Post 05 December 2016

Björn Albers posted this 02 December 2016

Hello,

I'm unable to connect our Promise Vtrak E630fD on Linux via Multipath.

Has anybody had success with this or further ideas?

Background: Both Vtrak controllers are connected directly to the server via fibre channel links.

The server (HP ProLiant DL 380 Gen9) runs on Ubuntu Linux:

$ cat /etc/lsb-release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=16.04

DISTRIB_CODENAME=xenial

DISTRIB_DESCRIPTION="Ubuntu 16.04 LTS"

$ uname -a

Linux gandalf 4.4.0-51-generic #72-Ubuntu SMP Thu Nov 24 18:29:54 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

I see both fibre channel connections are up:

$ cat /sys/class/fc_host/host?/port_state

Online

But by default only one device (/dev/sdb) appears.

This was fixed by enabling ALUA on the controllers - big thanks to Promise Support.

After the other device /dev/sdc comes up, which gets multiple times reported as "Not Ready" via dmesg:

[ 5.933339] scsi 1:0:0:0: Direct-Access Promise VTrak E630f 1017 PQ: 0 ANSI: 5

[ 5.951674] sd 1:0:0:0: Attached scsi generic sg2 type 0

[ 5.954112] sd 1:0:0:0: [sdb] 54687497984 512-byte logical blocks: (28.0 TB/25.5 TiB)

[ 5.954874] sd 1:0:0:0: [sdb] Write Protect is off

[ 5.954886] sd 1:0:0:0: [sdb] Mode Sense: 97 00 10 08

[ 5.955309] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, supports DPO and FUA

[ 5.965887] sd 1:0:0:0: [sdb] Attached SCSI disk

[ 6.228751] scsi 2:0:0:0: Direct-Access Promise VTrak E630f 1017 PQ: 0 ANSI: 5

[ 6.244989] sd 2:0:0:0: Attached scsi generic sg3 type 0

[ 6.245454] sd 2:0:0:0: [sdc] 54687497984 512-byte logical blocks: (28.0 TB/25.5 TiB)

[ 6.246795] sd 2:0:0:0: [sdc] Write Protect is off

[ 6.246796] sd 2:0:0:0: [sdc] Mode Sense: 97 00 10 08

[ 6.247416] sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, supports DPO and FUA

[ 6.257116] sd 2:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE

[ 6.257118] sd 2:0:0:0: [sdc] tag#0 Sense Key : Not Ready [current]

[ 6.257131] sd 2:0:0:0: [sdc] tag#0 Add. Sense: Logical unit not accessible, target port in standby state

[ 6.257146] sd 2:0:0:0: [sdc] tag#0 CDB: Read(16) 88 00 00 00 00 00 00 00 00 00 00 00 00 08 00 00

[ 6.257149] blk_update_request: I/O error, dev sdc, sector 0

I think here lies the problem.

Why makes the second connection trouble?

Therefore one path is always marked as "failed":

$ sudo multipath -l

vtrak (222c30001552d2e42) dm-2 Promise,VTrak E630f

size=25T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw

`-+- policy='round-robin 0' prio=0 status=active

|- 1:0:0:0 sdb 8:16 failed undef running

`- 2:0:0:0 sdc 8:32 active undef running

Thanks for your help in advance!

Björn

2 Comments

Order By: Standard | Latest | Votes

Devendra Kumar posted this 02 December 2016

Hi Bjorn,

It looks like this issue needs to be analyzed with the help of subsystem report of the unit to find out the problem. Please open a case at http://support.promise.com or call us at (408) 228-1500 to troubleshoot the issue.

Please follow the steps to save the service report.

Please login to the web interface of the unit and follow the below steps to save the complete subsystem report.

1. Click Save Service Report in the Header.

Information for the report is gathered and compiled. This action takes up to a few minutes, depending on the size of your RAID system.

2. Click the Save File option, then click the Save button. The report saves to your Host PC as a compressed HTML file.

Regards
Dev

Björn Albers posted this 05 December 2016

Hello Dev,

I've just sent the service report.

Regards,

Björn

Promise Vtrak Ex30 and Multipathing under Linux

Search

Categories