User guide

• Pair 1 is a Cnt Ac-S pair.
• Pair 2 is a Cnt Ac-J pair.
• Pair 3 is a Cnt Ac-J pair for delta resync.
• Pairs 4, pair 5, and pair 6 are FS pairs.
1. Create 3DC multi-target and delta resync pairs (pairs 1, 2, and 3).
2. Create pair 4.
3. Create pairs 5 and 6.
Thin Provisioning
Note the following if you are using FS, THP, and Thin Provisioning Z (THP Z) in a single storage
system:
• If you are expanding the THP V-VOL capacity, you cannot create FS pairs that have an THP
V-VOL as the P-VOL.
• You can use a maximum volume size of 4 TB (4,398,046,511,104 bytes) THP volume as a
FS P-VOL.
If you specify TB, GB, or MB as the unit when creating a volume, you cannot create a volume
of 4 TB (4,398,046,511,104 bytes). To create a volume of 4 TB (4,398,046,511,104 bytes),
for unit, specify block.
The following table explains how the maximum LDEV capacity differs depending on the
specified unit.
Maximum LDEV capacityUnit specification
3.99TB
4,095.99GB
4,194,303.75MB
8,589,934,592block
24 Overview of Fast Snap