Hello, we are using FCP attached tape devices on SLES 9 s390x SP3 for TSM for over one year now, in the last weeks we've added other tape models from same vendor. After getting syslog message "kernel: zfcp: warning: unknown incoming ELS 0x21100014 for adapter 0.0.c108" we have troubles with some to all tape devices on this fcp adapter. On another fcp adapter on the same system a second set of the same tape devices is working without problems. If we try to reset the fcp adapter with chccwdev -d/-e, IO's on the tape devices are working for some time, but after message "kernel: zfcp: warning: unknown incoming ELS 0x21100014 for adapter 0.0.c108" the tape devices stop working again. Extended Link Services (ELS) 0x21100014 appears to be PRLO (Process Logout). I did search for some more information in the internet, did find some issues if scsi initiator does not login again to target after PRLO ? Currently I'm trying to get more information by looking at fcp trace data produced while testing with TSM mttest command. In the trace I see that the target port and unit is reopened (and a soft error is returned to the application ?): zfcp: zfcp_erp_port_forced_reopen_internal(499): forced reopen of port 0x500104f000752a69 on adapter 0.0.c108 zfcp: zfcp_fsf_send_fcp_command_task_handler(4162): Setting DID_SOFT_ERROR and SUGGEST_RETRY zfcp: zfcp_fsf_send_fcp_command_task_handler(4333): scpnt->result =0x100b0000 zfcp: zfcp_fsf_open_unit_handler(3317): unit 0x0000000000000000 on remote port 0x500104f000752a69 on adapter 0.0.c108 opened, port handle 0x516
Does anyone have an idea what's going on here or why the zfcp driver doesn't handle PRLO ? Thank You ! Andreas Mayer Telekom Austria ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
