Allpriv> sh dev /full dsa87: Disk DSA87:, device type Generic SCSI disk, is online, mounted, file-oriented device, shareable, available to cluster, error logging is enabled, device supports bitmaps (no bitmaps active). Error count 0 Operations completed 448745 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 41943040 Sectors per track 128 Total cylinders 2560 Tracks per cylinder 128 Volume label "DISK87" Relative volume number 0 Cluster size 41 Transaction count 1 Free blocks 40887127 Maximum files allowed 499321 Extend quantity 5 Mount count 3 Mount status System Cache name "_DSA0:XQPCACHE" Extent cache size 64 Maximum blocks in extent cache 4088712 File ID cache size 64 Blocks in extent cache 3696437 Quota cache size 0 Maximum buffers in FCP cache 4136 Min ret. period 1-00:00:00.00 Max ret. period 1-00:00:00.00 Volume owner UIC [SYSTEM] Vol Prot S:RWCD,O:RWCD,G:RWCD,W:RWCD Volume Status: ODS-2, subject to mount verification, write-back caching enabled. Volume is also mounted on SERV22, SERV10. Disk $1$DGA6117:, device type HSV110, is online, device has multiple I/O paths, member of shadow set DSA87:, shadow set virtual unit, served to cluster via MSCP Server, error logging is enabled. Error count 0 Shadow member operation count 409802 Current preferred CPU Id 0 Fastpath 1 Host name "SERV21" Host type, avail AlphaServer ES40, yes Alternate host name "SERV10" Alt. type, avail AlphaServer ES45 Model 1B, yes Allocation class 1 I/O paths to device 5 Path MSCP (SERV10), primary path. Error count 0 Operations completed 330661 Path PGA0.5000-1FE1-5001-459D (SERV21), current path. Error count 0 Operations completed 61224 Path PGA0.5000-1FE1-5001-4598 (SERV21). Error count 0 Operations completed 5970 Path PGB0.5000-1FE1-5001-4599 (SERV21). Error count 0 Operations completed 5970 Path PGB0.5000-1FE1-5001-459C (SERV21). Error count 0 Operations completed 5977 Disk $1$DGA6217:, device type HSV110, is online, device has multiple I/O paths, member of shadow set DSA87:, shadow set virtual unit, served to cluster via MSCP Server, error logging is enabled. Error count 0 Shadow member operation count 407965 Current preferred CPU Id 0 Fastpath 1 Host name "SERV21" Host type, avail AlphaServer ES40, yes Alternate host name "SERV22" Alt. type, avail AlphaServer ES40, yes Allocation class 1 I/O paths to device 5 Path MSCP (SERV22), primary path. Error count 0 Operations completed 0 Path PGA0.5000-1FE1-5001-4518 (SERV21), current path. Error count 0 Operations completed 75502 Path PGA0.5000-1FE1-5001-451C (SERV21). Error count 0 Operations completed 332463 Path PGB0.5000-1FE1-5001-451D (SERV21). Error count 0 Operations completed 0 Path PGB0.5000-1FE1-5001-4519 (SERV21). Error count 0 Operations completed 0 $ DEFINE/SYSTEM/EXEC SITE_1 1 $ DEFINE/SYSTEM/EXEC SITE_2 2 $! $! At the SITE_1 site ... $ MOUNT/SYSTEM DSA87/SHAD=($1$DGA6117:,$1$DGA6217:) DISK87 $ SET DEVICE/SITE=SITE_1 DSA87: $! $! At the SITE_2 site ... $ MOUNT/SYSTEM DSA87/SHAD=($1$DGA6117,$1$DGA6217:) DISK87 $ SET DEVICE/SITE=SITE_2 DSA87: $! $! At both sites, the following would be used: $ SET DEVICE/SITE=SITE_1 $1$DGA6117: $ SET DEVICE/SITE=SITE_2 $1$DGA6217: