Thanks, John.
I guess I'll have to get some larger 2145 volumes and play around again. I
tried SCSIDISC against our big volumes on a 2107, which are of varying
sizes between 500GB and 1TB, and didn't notice any negative values. Weird,
but I'll mess around with it and see what I can find. Thanks for the
heads up.
Regards,
Eric
Eric Farman
z/VM I/O Development
IBM Endicott, NY
"Romanowski, John (OFT)" <[EMAIL PROTECTED]>
Sent by: The IBM z/VM Operating System <[email protected]>
11/26/2007 09:41 AM
Please respond to
The IBM z/VM Operating System <[email protected]>
To
[email protected]
cc
Subject
Re: Questions about LUN DASD volumes
Eric,
large LUN that I referred to was a 957GB LUN in an IBM SVC 2145. reported
LUN size (bytes) was correct, but prefixed with a minus sign.
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Eric R Farman
Sent: Monday, November 26, 2007 9:06 AM
To: [email protected]
Subject: Re: Questions about LUN DASD volumes
How large is large? I can't put my hands on one larger than 70GB at the
moment, and it looks fine. Will look for the huge disks tomorrow to try
them.
As for the fields reported as "XXXXX," that's due to some kind of I/O
error when trying to get a LUN to decribe itself. This sometimes occurs
because of an ACL restriction, as some DASD controllers will gladly tell
us a LUN exists, but reject any I/O directed at it. In those cases,
description I/O such as the SCSI Inquiry or Read Capacity commands will
fail, and we cannot fill in that information.
Regards,
Eric
Eric Farman
z/VM I/O Development
IBM Endicott, NY
"Romanowski, John (OFT)" <[EMAIL PROTECTED]>
Sent by: The IBM z/VM Operating System <[email protected]>
11/21/2007 03:49 PM
Please respond to
The IBM z/VM Operating System <[email protected]>
To
[email protected]
cc
Subject
Re: Questions about LUN DASD volumes
on some occasions SCSIDISC will report LUN_SIZE_(bytes) as a negative
number. Seen that only for large LUNs.
On other occasions some of the fields, LUN_SIZE too, will be reported as
XXXXX?s
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From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Steve Wilkins
Sent: Wednesday, November 21, 2007 3:43 PM
To: [email protected]
Subject: Re: Questions about LUN DASD volumes
Compliments of Eric R. Farman, a sample of the SCSIDISC output:
_FCP_CH_ ______WWPN______ _____LUN_ID_____ _VENDOR_ PROD MODL _SERIAL_
CODE _BLK_SIZE_ _DISKBLKS_ __LUN_SIZE_(bytes)__
0000B098 5005076300CA04DA 5100000000000000 IBM 2105 F20 10013262
.178 512 7617216 3900014592
0000B098 5005076300CA04DA 5101000000000000 IBM 2105 F20 10113262
.178 512 7617216 3900014592
0000B098 5005076300CA04DA 5102000000000000 IBM 2105 F20 10213262
.178 512 7617216 3900014592
0000B098 5005076300CA04DA 5103000000000000 IBM 2105 F20 10313262
.178 512 7617216 3900014592
0000B098 5005076300CA04DA 5104000000000000 IBM 2105 F20 10413262
.178 512 195328 100007936
0000B098 5005076300CA04DA 5105000000000000 IBM 2105 F20 10513262
.178 512 195328 100007936
0000B098 5005076300CA04DA 5106000000000000 IBM 2105 F20 10613262
.178 512 195328 100007936
0000B098 5005076300CA04DA 5107000000000000 IBM 2105 F20 10713262
.178 512 1953152 1000013824
0000B098 5005076300CA04DA 5108000000000000 IBM 2105 F20 10813262
.178 512 1953152 1000013824
0000B098 5005076300CA04DA 5109000000000000 IBM 2105 F20 10913262
.178 512 1953152 1000013824
0000B098 5005076300CA04DA 510A000000000000 IBM 2105 F20 10A13262
.178 512 1953152 1000013824
0000B098 5005076300CA04DA 510B000000000000 IBM 2105 F20 10B13262
.178 512 1953152 1000013824
Regards, Steve.
Steve Wilkins
IBM z/VM Development
