Forming the shadow set with the newly installed or upgraded
disk as the master causes the other disks in the shadow set to be
updated with a copy of the disk. (In a single-member shadow set,
although no other disks exist to be updated, the shadow set can
be used to facilitate replacement of a failed drive.)
After forming the shadow set, you can then dismount one of
the shadow set members and keep it as a backup. After you perform
the steps recommended in this chapter, you can place another volume
into the shadow set instead of doing the final backup, or re-add
the volume that was dismounted.
Form the shadow set as follows:
Enter the SHOW DEVICE D command to display
a list of disks available on your system. For example:
$ SHOW DEVICE D Device Device Error Volume Free Trans Mnt Name Status Count Label Blocks Count Cnt $11$DKB100: (NODE1) Online 0 $11$DKB200: (NODE1) Mounted 0 I64083 918150 1 31
DSAn: is the
virtual unit name of the shadow set, where n is
a unique number from 0 to 999.
upgraded-disk: is the name
of the shadowed system disk on which you just upgraded or installed
new-member: is the name of
the disk you want to add as a member of the shadow set.
volume-label is the volume
label of the shadow set you just upgraded or the disk you are creating.
NOTE: When you form the shadow set, the contents of the new
member are replaced by the contents of the disk you upgraded. Specifying
the /CONFIRM qualifier reminds you of this fact, confirming that
you are specifying the correct name of a disk that either is blank
or contains files you no longer need.
%MOUNT-F-SHDWCOPYREQ, shadow copy required Virtual Unit - DSA54 Volume label I64A083 Member Volume label Owner UIC $11$DKB100: (NODE1) SCRATCH [100,100] Allow FULL shadow copy on the above member(s)? [N]: YES
NOTE: Before continuing with the next step in this chapter,
after the shadow copy completes, dismount one of the shadow set
members to use as a backup. Normally, this should be the unit you
just added to the upgraded volume when you formed the shadow set
(in the preceding example, $11$DKB100:).
For OpenVMS I64, to add a shadowed system disk in a multiple-member
shadow set to the EFI boot device list and dump device list, HP
recommends using the OpenVMS I64 Boot Manager utility (SYS$MANAGER:BOOT_OPTIONS.COM).
Be sure to add all members to both lists.