IBM TotalStorage DS300 Best Practices Manual page 196

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7. On the Device tab the Flashcopy type Parent can be seen.

Figure 4-159 Flashcopy source logical drive — Device properties

8. The tab Flashcopy children exists only for Flashcopy source logical drives.

This tab lists the dates when the Flashcopy was taken. It also shows the Data

Space and the Virtual space. Data space is the current space required for

this Flashcopy in the array. Virtual space shows the maximum size to which

the Data space can grow up. In worst case this amount of free space is in the

array required. This depends on the amount of changed data in the source or

target logical drive. The figure shows also the second Flashcopy does not

require data space. This is because the COW area and COW lookup table are

shared between those two Flashcopys.

Figure 4-160 Flashcopy children properties of a Flashcopy source logical drive

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