Last question I hope. I've since created an /etc/zfcp.conf file with the
following.
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300c28276 0x0:0x502f000000000000
I ran "mk_initrd" and zipl. Upon reboot a I noticed the following in the
logs,
sd: allocated major 8
sd: find_free_slot ...<7>sd: ... found 08:00
Attached scsi disk sda at scsi0, channel 0, id 1, lun 0
sd: find_free_slot ...<7>sd: ... found 08:10
Attached scsi disk sdb at scsi1, channel 0, id 1, lun 0
zfcp: FSF: zfcp_fsf_send_fcp_command_task_handler: status for
SCSI Command:
00000000 0000
zfcp: FSF: zfcp_fsf_send_fcp_command_task_handler: SCSI status
code 0x2
00000000 00000000 00000202 00000000 00000020 00000000
70000600 00000018 00000000 29000000 00000400 00000000 00000000
00000000
SCSI device sda: 7812544 512-byte hdwr sectors (4000 MB)
sda: sda1
zfcp: FSF: zfcp_fsf_send_fcp_command_task_handler: status for
SCSI Command:
00000000 0000
zfcp: FSF: zfcp_fsf_send_fcp_command_task_handler: SCSI status
code 0x2
00000000 00000000 00000202 00000000 00000020 00000000
70000600 00000018 00000000 29000000 00000400 00000000 00000000
00000000
SCSI device sdb: 7812544 512-byte hdwr sectors (4000 MB)
sdb: sdb1
zfcp: config: zfcp_unit_enqueue: Warning: A Unit with SCSI LUN
0x0 already exists. Skipping record.
zfcp: SCSI: zfcp_config_parse_record_add: warning: unable to add
record: 0xa210 1:0x5005076300d08276 0:0x502f000000000000
zfcp: SCSI: zfcp_add_map_proc_write: Warning: One or several
mapping entries were not added to the module configuration.
It seems as though I am not "multipathing". Where did I go wrong???
SLES8/zVM 5.1.
Mark Wiggins
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Seader, Cameron
Sent: Wednesday, December 22, 2004 10:34 AM
To: [email protected]
Subject: Re: FCP question
you are correct.
-Cameron
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Wiggins, Mark
Sent: Wednesday, December 22, 2004 08:32
To: [email protected]
Subject: Re: FCP question
Ok, so lets take this a step further. Is there a one-to-one correlation
between FCP channel on VM and WWPN on switch? In other words, this
works...
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300d08276 0x0:0x502f000000000000
This does not...
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa210 0x1:0x5005076300c28276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300d08276 0x0:0x502f000000000000
0xa310 0x1:0x5005076300c28276 0x0:0x502f000000000000
Notice the difference in the WWPN's for each address.
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Seader, Cameron
Sent: Wednesday, December 22, 2004 9:40 AM
To: [email protected]
Subject: Re: FCP question
This would be called multipathing.
-Cameron
-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Wiggins, Mark
Sent: Wednesday, December 22, 2004 07:37
To: [email protected]
Subject: FCP question
I've been reading through a lot of documentation and "Googled" the heck
out of this thing but have yet to run across what I want to do so I'm
questioning whether or not it's feasible. The question really revolves
around redundancy. In most references to connecting an FCP device to
Linux (we're running SuSE SLES8 on z/VM 5.1), they talk about connecting
1 FCP channel on VM, to 1 WWPN on a switch to multiple LUN's on the
shark. In other words, something like this
On VM
ATTACH a210-a211 TO LINUX1 (Documentation suggested a QDIO
pair of addresses)
On Linux
rmmod zfcp
modprobe qdio
modprobe scsi_mod
insmod zfcp loglevel=0 map="\
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000"
modprobe sd_mod
With the key word mentioned above, "REDUNDANCY", is it possible/feasible
to do the following?
On VM
ATTACH a210-a211 TO LINUX1
ATTACH a310-a311 TO LINUX1
On Linux
rmmod zfcp
modprobe qdio
modprobe scsi_mod
insmod zfcp loglevel=0 map="\
0xa210 0x1:0x5005076300d08276 0x0:0x502f000000000000;\
0xa210 0x2:0x5005076300c28276 0x0:0x502f000000000000;\
0xa310 0x3:0x5005076300d08276 0x0:0x502f000000000000;\
0xa310 0x4:0x5005076300c28276 0x0:0x502f000000000000"
modprobe sd_mod
Notice the 2 different WWPN's for the 2 different addresses (a210 and
a310). Am I completely missing something here???
Mark Wiggins
University of Connecticut
Operating Systems Programmer
860-486-2792
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