Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-31 Thread Maciej Bogucki
Tomasz Sucharzewski napisaƂ(a): Hello, Ryan O'Hara wrote: 4 - Limitations ... - Multipath devices are not currently supported. What is the reason - it is strongly required to use at least two HBA in a SAN network, which is useless when using scsi reservation. Hello, There is need

Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-31 Thread Maciej Bogucki
I believe that this is only a limitation for RHEL4. RHEL5 should have a fix that allows dm-multipath to properly pass ioctls to all devices. Hello, One problem is registration, but another problem is un-registration fe. when there is failover from one HBA to another and failback. Third problem

Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-28 Thread Jeff Macfarland
Nice overview. Wish I had this a few weeks ago :-) I am curious as to why LVM2 is required? With simple modification of the scsi_reserve (and maybe fence_scsi), using an msdos partitioned disk seems to work fine. This is only in testing but I haven't seen any issues as of yet. Ryan O'Hara

Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-28 Thread Tomasz Sucharzewski
Hello, Ryan O'Hara wrote: 4 - Limitations ... - Multipath devices are not currently supported. What is the reason - it is strongly required to use at least two HBA in a SAN network, which is useless when using scsi reservation. Regards, Tomasz Sucharzewski On Fri, 28 Mar 2008 09:20:53 -0500

Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-28 Thread Alex Kompel
On Fri, Mar 28, 2008 at 8:15 AM, Ryan O'Hara [EMAIL PROTECTED] wrote: The reason for the cluster LVM2 requirement is for device discovery. The scripts use LVM commands to find cluster volumes and then gets a list of devices that make up those volumes. Consider the alternative -- users would

Re: [Linux-cluster] SCSI Reservations Red Hat Cluster Suite

2008-03-28 Thread Jeff Macfarland
True. Any solution for auto discovery? I've no problem with statically defining a device, but that would be pretty nice if possible. Alex Kompel wrote: On Fri, Mar 28, 2008 at 8:15 AM, Ryan O'Hara [EMAIL PROTECTED] wrote: The reason for the cluster LVM2 requirement is for device discovery. The