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тАО02-13-2001 09:28 AM
тАО02-13-2001 09:28 AM
Multiple Device ID's For LUN's
To elaborate - An IOSCAN shows four device ID's for each LUN, two for the FC card with path 8/8 and two for the other FC card 8/12.
Most of the disks are configured to use a prefered SAN controller of "A" but one or two are configured to "B". When controller "B" is failed the SAN reports that the SAN Volumes have been moved to controller "B". However the disks are not available to the HP-UX system anymore under any of the four device ID's.
Example -
LUN 0 shows the following Device Ids under IOSCAN c9t0d0,c12t0d0,c8t0d0 & c11t0d0. I have assigned c9t0d0,c12t0d0 as alternate and primary in a volume group and both of these ID's are assigned to controller "A" (prefered)on the SAN. However the other two device ID's which are assigned to controller "B" and for which I can perform a diskinfo to prove they are the same disks, can not be controlled by LVM. All disks are configured RAID 5.
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тАО02-23-2001 07:43 AM
тАО02-23-2001 07:43 AM
Re: Multiple Device ID's For LUN's
it shows up alternate link. With the FC60 the device files
for the lun can be confusing.
Send the ioscan too. Test your links with pvchange -s
/dev/dsk/whatever.
amdsp -a
may give something too.
If the host sees the disks, LVM should work.
(unless you need controller firmware upgrade)
Bill
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тАО03-09-2001 05:24 AM
тАО03-09-2001 05:24 AM
Re: Multiple Device ID's For LUN's
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тАО03-22-2001 03:55 AM
тАО03-22-2001 03:55 AM
Re: Multiple Device ID's For LUN's
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тАО03-23-2001 04:16 AM
тАО03-23-2001 04:16 AM
Re: Multiple Device ID's For LUN's
Your patch levels of the Scsi Pass Thru and
SCSI driver would be interesting too.
Try connecting to the RS232 interface to get status at the back of the controllers.
Later,
Bill