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The Question is:
I can not add an HSZ controlled disk into a shadow set of HSJ controlled disks. The disks are of the same family
(9 GB disks: 17768677 VMS blocks, RZ40-AS and RZ1DB-CA)
I can also not shadow two disk that are both controlled on the HSZ.
The operating system disk is on the HSJ and is shadowed.
The HSZ/DKA disk is shown mounted alone here:
VTEST2_System >>
VTEST2_System >> mount/noass/over=id vtest2$dka205
%MOUNT-I-MOUNTED, TEST205 mounted on _VTEST2$DKA205:
VTEST2_System >> show dev disk$test205/full
Disk VTEST2$DKA205:, device type DEC HSZ50-AX, is online, allocated, deallocate
on dismount, mounted, file-oriented device, shareable, available to cluster,
error logging is enabled.
Error count 0 Operations completed 81
Owner process "SYSTEM" Owner UIC [SYSTEM]
Owner process ID 0000091B Dev Prot S:RWPL,O:RWPL,G:R,W
Reference count 2 Default buffer size 512
Total blocks 17768677 Sectors per track 169
Total cylinders 5258 Tracks per cylinder 20
Volume label "TEST205" Relative volume number 0
Cluster size 18 Transaction count 1
Free blocks 17768160 Maximum files allowed 467596
Extend quantity 5 Mount count 1
Mount status Process Cache name "_VTEST2$DKA201:XQPCACHE"
Extent cache size 64 Maximum blocks in extent cache 1776816
File ID cache size 64 Blocks currently in extent cache 0
Quota cache size 0 Maximum buffers in FCP cache 3224
Volume owner UIC [1,1] Vol Prot S:RWCD,O:RWCD,G:RWCD,W:RWCD
Volume Status: subject to mount verification, write-back caching enabled.
VTEST2_System >> dismount/nounload disk$test205
I try to mount the HSZ based disk into the shadow here:
VTEST2_System >> mount dsa500:/shadow=(vtest2$dka205:) test500 test500
%MOUNT-I-MOUNTED, TEST500 mounted on _DSA500:
%MOUNT-I-SHDWMEMFAIL, _VTEST2$DKA205: failed as a member of the shadow set
-MOUNT-F-NOTSHDWDEV, not a valid shadow set member
%MOUNT-I-ISAMBR, _$4$DUA500: (HSJ002) is a member of the shadow set
%MOUNT-I-ISAMBR, _$4$DUA600: (HSJ002) is a member of the shadow set
VTEST2_System >>
VTEST2_System >>
VTEST2_System >> show dev dsa500/full
Disk DSA500:, device type MSCP served SCSI disk, is online, mounted, file-
oriented device, shareable, available to cluster, error logging is enabled.
Error count 0 Operations completed 294223
Owner process "" Owner UIC [SYSTEM]
Owner process ID 00000000 Dev Prot S:RWPL,O:RWPL,G:R,W
Reference count 1 Default buffer size 512
Total blocks 17768677 Sectors per track 169
Total cylinders 5258 Tracks per cylinder 20
Volume label "TEST500" Relative volume number 0
Cluster size 18 Transaction count 1
Free blocks 17742528 Maximum files allowed 467596
Extend quantity 5 Mount count 1
Mount status System Cache name "_VTEST2$DKA201:XQPCACHE"
Extent cache size 64 Maximum blocks in extent cache 1774252
File ID cache size 64 Blocks currently in extent cache 0
Quota cache size 0 Maximum buffers in FCP cache 3224
Volume owner UIC [1,1] Vol Prot S:RWCD,O:RWCD,G:RWCD,W:RWCD
Volume Status: subject to mount verification, write-back caching enabled.
Disk $4$DUA500:, device type MSCP served SCSI disk, is online, member of shadow
set DSA500:, error logging is enabled.
Error count 0 Shadow member operation count 1547
Host name "HSJ002" Host type, avail HSJ5, yes
Alternate host name "HSJ003" Alt. type, avail HSJ5, yes
Allocation class 4
Disk $4$DUA600:, device type MSCP served SCSI disk, is online, member of shadow
set DSA500:, error logging is enabled.
Error count 0 Shadow member operation count 15856
Host name "HSJ002" Host type, avail HSJ5, yes
Alternate host name "HSJ003" Alt. type, avail HSJ5, yes
Allocation class 4
VTEST2_System >>
The Answer is : Shadowing requires that non-zero device allocation classes be configured, and it requires that device geometries (tracks, sectors, platters) match.
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