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re .1 et .2
Here are the 2 device descriptions. I have the feeling that the
custommer cannot
shadow them because the 2 disks are not of the same type and do not
present the same Total blocks.
So the question is: Is there a way to configure the KZPSC so as to
have the RZ28D be considered as of type RZ28D whith the correct size?
Soumetty
Disk $3$DRA2: (MDHS1), device type 1 Member JBOD, is online, mounted, file-
============================================
oriented device, shareable, available to cluster, error logging is enabled.
Error count 0 Operations completed 6013
Owner process "" Owner UIC [SYSTEM]
Owner process ID 00000000 Dev Prot S:RWPL,O:RWPL,G:R,W
Reference count 15 Default buffer size 512
Total blocks 4110336 Sectors per track 64
Total cylinders 4014 Tracks per cylinder 16
Allocation class 3
Volume label "MDHS1_DISK4" Relative volume number 0
Cluster size 4 Transaction count 15
Free blocks 268052 Maximum files allowed 411033
Extend quantity 5 Mount count 1
Mount status System Cache name "_$3$DKA0:XQPCACHE"
Extent cache size 64 Maximum blocks in extent cache 26805
File ID cache size 64 Blocks currently in extent cache 0
Quota cache size 157 Maximum buffers in FCP cache 774
Min ret. period 180-00:00:00.00 Max ret. period 181-00:00:00.00
Volume owner UIC [SYSTEM] Vol Prot S:RWCD,O:RWCD,G:RWCD,W:RWCD
Volume Status: subject to mount verification, write-back caching enabled.
MDHS1>SYSTEM> sh dev /full $3$dka100
====================================
Disk $3$DKA100: (MDHS1), device type DEC RZ28D, is online, mounted, file-
oriented device, shareable, available to cluster, error logging is enabled.
Error count 0 Operations completed 51003
Owner process "" Owner UIC [SYSTEM]
Owner process ID 00000000 Dev Prot S:RWPL,O:RWPL,G:R,W
Reference count 59 Default buffer size 512
Total blocks 4110480 Sectors per track 86
Total cylinders 2988 Tracks per cylinder 16
Allocation class 3
Volume label "MDHS1_DISK1" Relative volume number 0
Cluster size 9 Transaction count 40
Free blocks 2495016 Maximum files allowed 411033
Extend quantity 5 Mount count 1
Mount status System Cache name "_$3$DKA0:XQPCACHE"
Extent cache size 64 Maximum blocks in extent cache 249501
File ID cache size 64 Blocks currently in extent cache 1971
Quota cache size 157 Maximum buffers in FCP cache 774
Min ret. period 180-00:00:00.00 Max ret. period 181-00:00:00.00
Volume owner UIC [SYSTEM] Vol Prot S:RWCD,O:RWCD,G:RWCD,W:RWCD
Volume Status: subject to mount verification, write-back caching enabled.
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| You guess correctly that the disks cannot be shadowed due to different
characteristics (block count, sectors, tracks, cylinders).
I do not know the KZPSC but I've heard of something called "transparent mode"
which presents the disk exactly as it is, perhaps this is what you need to
find the correct configuration parameters in the documentation.
If you can convince the KZPSC to pass on the disk's characteristics exactly,
you can shadow it to the other one.
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