2 preparing for compatible flashcopy operations, Requirements of compatible flashcopy – HP XP P9500 Storage User Manual
Page 34
2 Preparing for Compatible FlashCopy operations
This chapter describes how to prepare for Compatible FlashCopy operations.
Requirements of Compatible FlashCopy
You can establish a Compatible FlashCopy relationship not only for simplex volumes, but also for
non-simplex BC Z S-VOLs or T-VOLs in the status other than simplex.
The following table shows other requirements on using Compatible FlashCopy.
Table 19 Requirements of Compatible FlashCopy
Requirement
Item
I-2105 and I-2107
Controller emulation type
The controller emulation type of an S-VOL and a T-VOL must be the same.
FC Z can use the volume whose LDKC:CU:LDEV (LDKC: control unit image: logical
device ID) is between 00:00:00 and 00:FE:FF.
Available volume
The following table shows the emulation types supported by Compatible FlashCopy and the
condition for the combination of S-VOL and T-VOL.
Table 20 Emulation types supported by Compatible FlashCopy
Emulation type of T-VOL
Emulation
type of
3390-A
3390-M
3390-L
3390-9
3390-3
3390-2
3390-1
3380-3
S-VOL
NO
NO
NO
NO
NO
NO
NO
OK
3380-3
NO
OK
OK
OK
OK
OK
OK
NO
3390-1
OK
OK
OK
OK
OK
OK
OK
NO
3390-2
OK
OK
OK
OK
OK
OK
OK
NO
3390-3
OK
OK
OK
OK
OK
OK
OK
NO
3390-9
OK
OK
OK
OK
OK
OK
OK
NO
3390-L
OK
OK
OK
OK
OK
OK
OK
NO
3390-M
OK
OK
OK
OK
OK
OK
OK
NO
3390-A
If the emulation type is started with 3390, you can specify the volumes of different emulation types
for S-VOL and T-VOL. However, you cannot establish a relationship using a 3380-3 volume and
a volume whose emulation type is started with 3390. In case of 3380-3 volume, you must specify
3380-3 volumes both for S-VOL and T-VOL.
The specified extent must be within the range of the user cylinders in each volume.
Calculating the maximum number of Compatible FlashCopy relationships
Compatible FlashCopy can establish up to 1,048,575 relationships. However, it may not be able
to establish up to 1,048,575 relationships depending on the number of resources that are required
for the copy operation. These resources vary according to the attributes such as emulation type,
capacity, size of the data that is copied, and position of the extent of the volumes. These resources
also vary due to the extents that are used for establishing the relationships.
You can use the Compatible FlashCopy Information dialog box to check the number of remaining
resources that are currently available. Check the FC Z Information dialog box when you create a
FC Z relationship.
34
Preparing for Compatible FlashCopy operations