We have an older model SANs device that we are not having much luck with
connecting to our Red Hat Linux (5.3) under z/VM 5.4. We specified the LUN as 0
on the SANs device. It is a CorData SAN and we are contacting the vendor.
All seems to go well until I try to echo the LUN into unit_add
Following the Red Hat Installation Guide for adding FCP devices dynamically:
>From VM, attach 0000 to LSSB1 as 0900
att 0000 LSSB1 as 0900
>From LSSB1
lscss
Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs
----------------------------------------------------------------------
0.0.0592 0.0.0000 3390/0A 3990/E9 F0 F0 FF 50515253 00000000
"
0.0.0900 0.0.0022 1732/03 1731/03 80 80 FF 08000000 00000000
cd /sys/bus/ccw/drivers/zfcp/0.0.0900
echo 1 > online
lscss
Device Subchan. DevType CU Type Use PIM PAM POM CHPIDs
----------------------------------------------------------------------
0.0.0592 0.0.0000 3390/0A 3990/E9 F0 F0 FF 50515253 00000000
"
0.0.0900 0.0.0022 1732/03 1731/03 yes 80 80 FF 08000000 00000000
dmesgf
scsi0 : zfcp
zfcp: The adapter 0.0.0900 reported the following characteristics:
WWNN 0x5005076400c77aed, WWPN 0x5005076401e2a15c, S_ID 0x00000c00,
adapter version 0x4, LIC version 0x70b, FC link speed 2 Gb/s
zfcp: Point-to-Point fibrechannel configuration detected at adapter 0.0.0900
Peer WWNN 0x1000000402e00621, peer WWPN 0x2000000402e00621, peer d_id 0x000d00
echo 0x2000000402e00621 > /sys/bus/ccw/drivers/zfcp/0.0.0900/port_add
cd 0x2000000402e00621
echo 0x00 > unit_add
at this point the session is hung
from an new session
dmesg
zfcp: resetting unit 0x0000000000000000
zfcp: host/bus reset because of problems with unit 0x0000000000000000
lszfcp -a
0.0.0900 host0
Bus = "ccw"
availability = "good"
card_version = "0x0004"
cmb_enable = "0"
cutype = "1731/03"
devtype = "1732/03"
failed = "0"
hardware_version = "0x00000000"
in_recovery = "1"
lic_version = "0x0000070b"
modalias = "ccw:t1731m03dt1732dm03"
online = "1"
peer_d_id = "0x000d00"
peer_wwnn = "0x1000000402e00621"
peer_wwpn = "0x2000000402e00621"
status = "0x4500092e"
Class = "fc_host"
maxframe_size = "2112 bytes"
node_name = "0x5005076400c77aed"
permanent_port_name = "0x5005076401e2a15c"
port_id = "0x000c00"
port_name = "0x5005076401e2a15c"
port_type = "Point-To-Point (direct nport connection"
serial_number = "IBM02000000077AED"
speed = "2 Gbit"
supported_classes = "Class 2, Class 3"
supported_speeds = "4 Gbit"
tgtid_bind_type = "wwpn (World Wide Port Name)"
Class = "scsi_host"
cmd_per_lun = "1"
host_busy = "1"
proc_name = "zfcp"
sg_tablesize = "538"
state = "recovery"
unchecked_isa_dma = "0"
unique_id = "0"
Interesting the wwpn seems to be communicated fine but the LUN causes a
problem. The unit is getting reset on the Linux side and going into recovery.
The logs in the SANs device don't show anything. The lszfcp command reports a
status of "0x4500092e". Any insight or what steps to take next would be
appreciated.
Thanks
Bobby Bauer
Center for Information Technology
National Institutes of Health
Bethesda, MD 20892-5628
301-594-7474
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