Volume Copy Using the vol copy Command Set15-7

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You need the volume copy operation number if you want to stop a volume copy oper-
ation or change the volume copy operation speed.
For more information about obtaining the volume copy operation number, see
Checking the Status of a Volume Copy Operation.

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When the filer is copying a volume, the filer displays messages indicating the percent-
age of the volume copy operation completed and the number of minutes remaining.
When the filer finishes copying all data, it displays the filer prompt.
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Each filer supports up to four simultaneous volume copy operations. Whether a filer
can execute a vol copy start command depends on how many volume copy
operations are already in progress on the filer or filers specified in the volcopy
start command, as illustrated in the following examples.
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You can enter the following two vol copy start commands on a filer to copy
volumes locally:
vol copy start vol0 vol1
vol copy start vol2 vol3
When these commands are in progress, you cannot enter additional
vol copy start commands because four volume copy operations are already
running on the filer. Two of the operations are for reading the vol0 and vol2 volumes,
and two of the operations are for writing the vol1 and vol3 volumes.
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Suppose you enter the following three vol copy start commands on a filer
named filerA to copy volumes to another filer named filerB.
vol copy start vol0 filerB:vol0
vol copy start vol1 filerB:vol1
vol copy start vol2 filerB:vol2
When these commands are in progress, filerA runs three volume copy operations to
read the volumes, and filerB runs three volume copy operations to write the volumes.
You can enter an additional vol copy start command to copy between filerA
and filerB because the command adds one more volume copy operation to each filer.
However, you cannot enter an additional vol copy start command to copy vol-
umes locally on either filerA or filerB. This is because the additional command would
create two volume copy operations, one for reading and one for writing, on the filer