On 3/2/06, Maxim Kozover <maximkoz@xxxxxxxxxxxxxxxx> wrote: > Hi Andrew! > Today I tested disconnecting QLogic port. > Adapter 4 is connected via switch to a storage and 3 LUNs are seen via > the adapter. > Only 1 rport is created (for FCP Target) while in Emulex case there > were 3: (Fabric Port, Directory Server and FCP Target, FCP Initiator). > # ls /sys/class/fc_remote_ports/ > rport-4:0-0 > # cat /sys/class/fc_remote_ports/*/roles > FCP Target > > Default dev_loss_tmo is 6 (1+5) while in Emulex case the default was 35. > > After disconnecting the cable between the HBA and the switch > qla2xxx 0000:03:01.0: LOOP DOWN detected (2). > rport-4:0-0: blocked FC remote port time out: removing target and saving binding > > # ls /sys/class/fc_remote_ports/ > rport-4:0-0 > # cat /sys/class/fc_remote_ports/*/roles > unknown > > Relevant scsi devices are removed from /proc/scsi/scsi. > > After reconnecting the cable > qla2xxx 0000:03:01.0: LIP reset occured (f7f7). > qla2xxx 0000:03:01.0: LOOP UP detected (2 Gbps). > > # ls /sys/class/fc_remote_ports/ > rport-4:0-0 > # cat /sys/class/fc_remote_ports/*/roles > FCP Target > > However, scsi devices don't reappear in /proc/scsi/scsi. > When I issue rescan, the command is stuck > echo - - - > /sys/class/scsi_host/host4/scan Historically the qlogic driver rescan is a 2-phase process: 1) schedule the rescan, e.g.: echo scsi-qlascan > /proc/scsi/qla2xxx/4 2) rescan, e.g.: echo - - - > /sys/class/scsi_host/host4/scan BUT, I've just used scsi-qlascan to discover _new_ devices... not existing devices that experienced FC connection loss. I assume the qla driver _should_ just bring those lost devices back? But does the historic 2-phase rescan for new devices speak to why the qlogic driver doesn't automagically bring the old devices back? Or has the latest qlogic driver in mainline advanced past this 2-phase requirement in general? regards, Mike Mike - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
