Hello, I want to run fencing based on SCSI-3 persisten reservation protocol. I have two servers with GFS filesystem and I want to write to all of them at one time. But when I start scsi_reserve on the second node I get: ---cut--- Aug 10 11:26:08 host2 scsi_reserve: register of device /dev/sdb1 succeeded Aug 10 11:26:08 host2 kernel: scsi0 (0,0,1) : reservation conflict Aug 10 11:26:08 host2 kernel: 492 [RAIDarray.mpp]Array_Module_0:1:0:1 IO FAILURE. vcmnd SN 35975 pdev H0:C0:T0:L1 0x00/0x00/0x00 0x00000018 mpp_status:3 Aug 10 11:26:08 host2 kernel: scsi2 (0,0,1) : reservation conflict Aug 10 11:26:08 host2 kernel: SCSI error : <2 0 0 1> return code = 0x18 ---cut--- So I think that RH4U5 only supports SCSI-2 persistent reservations. But here [1] we can read that RH4U5 support for SCSI-3 persistent group reservations. SCSI-3 is a group reservation: every node has a key on a dedicated area on the disk and when a node has to leave, another node will just kick off its key. So it is what I'm looking for. [1] - http://www.desktoplinux.com/news/NS3524659857.html Best Regards Maciej Bogucki -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
