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тАО05-22-2003 05:40 AM
тАО05-22-2003 05:40 AM
LUN Security still showing emulation type in ioscan output
disk 10 0/4/0/0.1.24.0.0.0.0 sdisk CLAIMED DEVICE HITACHI OPEN-8*4
/dev/dsk/c13t0d0 /dev/rdsk/c13t0d0
disk 12 0/4/0/0.1.24.0.0.1.0 sdisk CLAIMED DEVICE HITACHI OPEN-8*4
/dev/dsk/c13t1d0 /dev/rdsk/c13t1d0
disk 14 0/4/0/0.1.24.0.0.2.0 sdisk CLAIMED DEVICE HITACHI OPEN-8*4
/dev/dsk/c13t2d0 /dev/rdsk/c13t2d0
disk 16 0/4/0/0.1.24.0.0.3.0 sdisk CLAIMED DEVICE HITACHI OPEN-E*2
/dev/dsk/c13t3d0 /dev/rdsk/c13t3d0
disk 22 0/4/0/0.1.24.0.0.4.0 sdisk CLAIMED DEVICE HITACHI OPEN-E
/dev/dsk/c13t4d0 /dev/rdsk/c13t4d0
This last device OPEN-E is the only real device. All other devices are dummy devices that should not be in the list for this path. If you check disk_info all have zero byte capacity except the last one which is the real lun.
I have run the diskinfo command on these devices which returns 0 bytes (what I expect). My question is; is this correct behaviour? I was under the assumption that these devices would show up with "HITACHI DISK SUBSYSTEM" in the output rather than the emulation type which can be rather confusing.
Can anyone address this?
Thanks.
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тАО05-22-2003 05:48 AM
тАО05-22-2003 05:48 AM
Re: LUN Security still showing emulation type in ioscan output
a) Why are these disks showing up?
b) Why is the device description showing "OPEN*4" etc?
Answers,...
a) The Disks with cXtYd0 (last digit = Zero) are included as place holders, so that HP-UX can generate the proper cXtYdZ device file. However, because they are not "visible", they return Zero size.
b) Dunno, but have you got the latest Fibre and SCSI patches on the HP Host?
Share and Enjoy! Ian
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тАО05-23-2003 04:20 AM
тАО05-23-2003 04:20 AM
Re: LUN Security still showing emulation type in ioscan output
The 9960 can map these 'LUN 0's as pseudo 'disk subsystem' devices only, if these luns do not exist on its port. If they exits, as in your case (maybe used by other server?) the 9960 uses the description of the real lun for the pseudo devices, too.
Regards, Bernd
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тАО05-23-2003 05:40 AM
тАО05-23-2003 05:40 AM
Re: LUN Security still showing emulation type in ioscan output
Can I ask what is the desire to see these represented differently?
/dev/rdsk/c11t0d0 0 0 CL2G 1:a7 OPEN-9 0 00059999 0127
/dev/rdsk/c11t0d4 0 4 CL2G 1:54 OPEN-9 7042 00059999 0127
/dev/rdsk/c11t2d0 2 0 CL2G 3:95 OPEN-9 0 00059999 0127
/dev/rdsk/c11t3d0 3 0 CL2G 1:ba OPEN-9*3 0 00059999 0127
/dev/rdsk/c11t4d0 4 0 CL2G 2:1a OPEN-9 0 00059999 0127
Share and Enjoy! Ian
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тАО05-23-2003 06:09 AM
тАО05-23-2003 06:09 AM
Re: LUN Security still showing emulation type in ioscan output
disk 12 0/2/0/0.1.22.0.0.0.1 sdisk NO_HW DEVICE HP OPEN-E
/dev/dsk/c21t0d1 /dev/rdsk/c21t0d1
I can imagine it should be similar setting for Hitachi arrays too. Ask Hitachi, please -:)
HTH,
Wojtek
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тАО05-23-2003 12:27 PM
тАО05-23-2003 12:27 PM
Re: LUN Security still showing emulation type in ioscan output
I would like to be able to see the output as "HITACHI DISK SUBSYSTEM" in the output. The reason for this is that there are a number of sysadmins who may be accessing this box at any given time and I don't want any confusion as to which are real and which are Dummy disks.
I wrote a script that checks for 0 byte size in diskinfo output that gets around this.
Thanks all.
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тАО06-25-2003 11:56 AM
тАО06-25-2003 11:56 AM
Re: LUN Security still showing emulation type in ioscan output
The default is to check every I/O, which is likely the situation you find yourself in.
So yes, I think this is normal behavior. If you want to report the device as not present you need your HDS engineer to set a system mode bit (global setting). This may give you what you want but seems quite risky to me.
Good Luck.
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тАО06-25-2003 12:24 PM
тАО06-25-2003 12:24 PM
Re: LUN Security still showing emulation type in ioscan output
He informed me that this is the way HDS arrays work with HP-UX. It appears as though the description field shows the disk description although LUN security is preventing the actual disk from appearing.
The disk description is stored somewhare is shared memory which is able to penetrate through LUN Security. Not a problem for me though. I just wrote a script to check the filesize of the disk . If 0 bytes, then I flag that as an HDS disk.
Thanks for all responses.