Modifying properties to use scsi-3 reservation for disks with two paths in sun cluster
Hi
I am having two node cluster. I was trying to change the to use scsi3 reservation for all disks having two paths. Please let me know where I went wrong or there any issue to implement the same.
On node1
Now above command hanged & no # prompt was coming on the terminal.
In above process, I want to follow process where I was trying to add first another quorum d4 & then remove the d6 quorum & then change the default_fencing properties of d6 & then add the d6 as quorum & then remove the d4 as quorum. Moreover I am not concern about d8 & d11 as those are local disk . After above process scsi3 reservation was implemented properly.
Need to abruptly shutdown both the nodes as even cluster shutdown comman was not working.
While rebooting both the nodes as nothing was working after running last command, I am getting following the messages on both nodes.
NOTICE: CMM: Cluster Doesn't have operational quorum yet; waiting for quorum
Then I used the following procedure on both nodes to recover my cluster where I deleted quorum device d4 entries from infrastructure file & reboot the nodes. After rebooting the nodes in cluster I wanted to follow another procedure where I will put the cluster in installed mode & remove d6 from quorum device & change it default_fencing properties to global & then add d6 as quorum device.
On node1
Again after running last command that got hanged & didn't got any # prompt.
I need to shutdown abruptly both the nodes again.
Kindly let me know how can I make d6(quorum device) as scsi3 reservation
Last edited by sb200; 09-04-2015 at 04:27 PM..
Reason: to explaing in better way
I've read your post a few times but find it difficult to determine exactly what's happening. However, without a doubt, although you might find it unavoidable to "abruptly shutdown" the cluster, for scsi3 LUNs this is bad news.
In scsi2 reserve/release the reservation(s) are cleared with a scsi reset (ie, a reboot) but in scsi3 the reservations are persistent and survive a reboot. Therefore such reservations need to be cleared somehow.
Thanks for the input Hicksb8. I am doing this on my practice cluster luns are iscsi based.
I am just trying to implement the SCSI3 reservation on two path devices in cluster.
In first logs I just wanted to change the global_ default fencing to prefer3 mean scsi3 where it change all the reservation of shared disks from scsi2 to scsi3 except quorum device d6 which have I have to change it manually by adding d4 device as quorum (while adding this d4 device(Scsi3) in cluster, my command got hanged ). If my command didn't got hanged & went smoothly then remove the d6 from quorum device control then change the default_fencing parameter of device d6 to global from pathcount . After this I wanted to add the d6 in quorum device. & remove the d4 from quorum control. As in two node cluster we cannot directly remove the d6 (single)quorum device due to quorum of the server will be compromised untill & unless we put the cluster in installedmode which I did in seconds logs.
In both the above logs/procedure you will notice I am trying to add disk which is having scsi 3 reservation. Is due to adding the scsi3 reservation disk in quorum control my cluster got hanged both the times in above mention both logs meaning even simple "clq status" got hanged then I need to take the cluster reboot . As per my knowledge only these two process are to implement scsi3 reservation on two path devices.
My cluster is 3.2 & kindly let me know is their any way to implement scsi3 reservation on two path devices including quorum device.
Last edited by sb200; 09-05-2015 at 08:12 AM..
Reason: Wanted to add more information for clearity
Now even I have been thinking that due to my iscsi setup in cluster is not supporting scsi 3 reservation
As you notice my inital logs I am able to add another LUN as quorum device in two node cluster mean LUN based on scsi2 reservation.
Currently I am using iscsitadm command to create LUNs on solaris machine & mapping those LUNS to two solaris nodes.
Kindly share your further view on my current setup
It depends on whether your SAN controller supports SCSI3 reservation irrespective of whether you have SCSI3 disks in the array. There may be a manufacturer's firmware upgrade.
You didn't answer my question as to what make/model the SAN is?
(Do you have two userid's on this forum? I started a dialogue with OP 'sb200' but now being answered by 'amity'.)
Hi guys,
I need some help to better understand how to determine if a disk have persistent SCSI reservation. I know that we should use the "Persisten Reservation Utility" but we are not allowed to run that tool. Since we have the output from some grab utility and specifically we have the... (0 Replies)
Hi All,
I am a RH Linux admin that recently started working at a company with a number of SUN Servers so it's been an interesting transition.
Considering the last person left with very little documentation left behind so I have been picking up most issues half complete, or troubleshot.
... (7 Replies)
Hello experts -
I am planning to install a Sun cluster 4.0 zone cluster fail-over. few basic doubts.
(1) Where should i install the cluster s/w binaries ?. ( global zone or the container zone where i am planning to install the zone fail-over)
(2) Or should i perform the installation on... (0 Replies)
Yesterday my customer told me to expect a vcs upgrade to happen in the future. He also plans to stop using HDS and move to EMC.
Am thinking how to migrate to sun cluster setup instead.
My plan as follows leave the existing vcs intact as a fallback plan.
Then install and build suncluster on... (5 Replies)
Hi,
I am installing perl and rsnapshot on the OS of a Western Digital MyBook disk.
To install perl the ./Configure command tells me that both 'tr' and 'split' are missing. I don't find them on the net.
Where can I download them?
Thanks.
Charles. (2 Replies)
First time writer....take it easy on me.
I had a situation where I lost all paths to EMC disk. There was a failure on the EMC frame. After that was repaired, my server had a difficult time reclaiming all disks and veritas had marked the disks as failed. Veritas was confused. What are some of... (3 Replies)
Hello agian !
What is the difference between SCSI and IDE hard disks ?
I have Intel PC and when i check i have Generic IDE TYPE DISK0
is IDE hard disk is ok for Solrais ? or should i buy the SCSI hard disk ?
Thanks
Abid Malik (3 Replies)