If you have upgraded a disk in a volume shadowing
environment, you must now re-form the shadow set. If you want to
form a shadow set for a newly installed system disk, you can do this
now or later. To do so requires that the VOLSHAD license has been
entered and loaded. In addition, you must set several system parameters,
as explained in Section 7.4, and then you must run AUTOGEN and reboot the system, as explained
in Section 7.6.
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, 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:
the SHOW DEVICE D command to display a list of disks available on
your system. For example:
$ SHOW DEVICE DDevice Device Error Volume Free Trans Mnt
Name Status Count Label Blocks Count Cnt
$11$DKB100: (NODE1) Online 0
$11$DKB200: (NODE1) Mounted 0 I64084 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 OpenVMS.
new-member: is the name of the disk you want to add as a member of the shadow
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/CONFIRM/SYSTEM DSA54: /SHADOW=($11$DKB200:,$11$DKB100:) I64084%MOUNT-F-SHDWCOPYREQ, shadow copy required
Virtual Unit - DSA54 Volume label I64A084
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
For OpenVMS Integrity servers, 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 Integrity
servers Boot Manager utility (SYS$MANAGER:BOOT_OPTIONS.COM). Be sure
to add all members to both lists.