st reservation conflicts

[thinktank]

Hi,

We have a Netbackup 7.0 environment with few media servers. We are adding some more media servers which are on HP C class Bade servers.

Hardware/OS : 

HP BL685c G7s in a HP flexfabric C7000 chassis on RH5U8 (OS).

 As soon as i zone shared drives to the blade servers on these chasis, i get SCSI reservation conflicts messages in the /var/log/messages. This is prior to installing Netbackup. Any idea  ?

Jun 12 10:46:49 ashprdcatdb02e kernel: st 2:0:1:0: reservation conflict
Jun 12 10:46:49 ashprdcatdb02e kernel: st1: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 10:46:49 ashprdcatdb02e kernel: st 2:0:4:0: reservation conflict
Jun 12 10:46:49 ashprdcatdb02e kernel: st4: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 10:46:49 ashprdcatdb02e kernel: st 2:0:6:0: reservation conflict
Jun 12 10:46:49 ashprdcatdb02e kernel: st6: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 10:55:18 ashprdcatdb02e ntpd[10669]: synchronized to 172.20.5.42, stratum 3
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:1:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st1: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:2:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st2: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:3:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st3: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:4:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st4: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:5:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st5: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:06:50 ashprdcatdb02e kernel: st 2:0:9:0: reservation conflict
Jun 12 11:06:50 ashprdcatdb02e kernel: st9: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
Jun 12 11:13:22 ashprdcatdb02e ntpd[10669]: synchronized to 172.20.5.41, stratum 3
Jun 12 11:26:50 ashprdcatdb02e kernel: st 2:0:9:0: reservation conflict
Jun 12 11:26:50 ashprdcatdb02e kernel: st9: Error 110018 (sugg. bt 0x0, driver bt 0x0, host bt 0x11).
 

Rajiv.

Sep 2012 - Any other suggestions ? The symantec docs did not help.

Thanks.

[SAF]

Hello Thinktank, have you checked this info from Symantec site:

http://www.symantec.com/business/support/index?page=content&id=HOWTO32842

The info refers these four helpfull links:

http://www.symantec.com/business/support/index?page=content&id=HOWTO32843#v12948584

http://www.symantec.com/business/support/index?page=content&id=HOWTO32837#v12948511

http://www.symantec.com/business/support/index?page=content&id=HOWTO32844#v12948595

http://www.symantec.com/business/support/index?page=content&id=HOWTO32767#id-SF830142689

Let us know if it helps.

SAF

[Nicolai · Accepted solution]

It's quite normal when more host access the same devices. If a device is SCSI reserved to a host it will only respond to that host until it released. I assume you see these messages because the tapedrives are in use, and the new media servers try to poll the device from the OS layer.

http://www.symantec.com/docs/HOWTO13888