Dell EMC Data Domain FS15 SSD Shelf Hardware Manual page 22

Installing the Shelves
DD system Memory
required
(GB)
3
DD640 20
DD660 16
DD670 16
DD670 36
DD690 16
Data Domain ES30 Expansion Shelf and FS15 SSD Shelf Hardware Guide
22
Do not mix ES30s and ES20s in the same set. A set is the group of shelves
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connected together and to the same Data Domain system's controller ports.
Do not mix SAS-based ES30 shelves with any other shelf type in the same set.
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For redundancy, the two connections from a Data Domain system to a set of
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shelves must use ports on different SAS HBAs or SAS I/O modules. The DD2500
and DD6300 systems are an exception to this rule.
Use the Installation and Configuration Guide for your controller to minimize the
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chance of a cabling mistake.
A Data Domain system cannot exceed its maximum raw external shelf capacity,
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regardless of added shelf capacity.
When used, a FS15 shelf does not count against the capacity total but it is counted
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for shelf limits.
Note
ES30-45 SATA shelves must be running DD OS 5.4 and later and are only
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supported on the DD990, DD4200, DD4500, DD6300, DD6800, DD7200, DD9300,
DD9500, and DD9800 systems.
ES30 SAS shelves must be running DD OS 5.4 and later and are only supported on
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DD2500, DD4200, DD4500, DD6300, DD6800, DD7200, DD9300, DD9500, and
DD9800 systems.
DD OS 5.6 does not support the ES20 shelves on the DD9500 systems. However,
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in DD OS 5.7 and later, ES20 shelves can be attached to a DD6300, DD6800 and
DD9300, or DD9500 or DD9800 system only for the period of time necessary to
complete the shelf migration process.
DD OS 5.7 and later support 4TB drives on the DD4500, DD6300, DD6800,
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DD7200 (256GB), DD9300, DD9500, and DD9800 systems.
DD OS 5.7 and later do not support the DD660, DD690, DD880 systems.
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ERSO systems do not support HA or DD Cloud Tier.
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HA systems do not support SATA drives.
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Table 10 Shelf configuration supported per Data Domain system
SAS ES30 ES20
cards/ support support
port per (TB) (TB)
card
2x4 15, 30 No
support
2x2 15 8, 16
2x4 15 16
(Optional)
2x4 15, 30 16, 32
(Optional)
2x2 15 8, 16
Max Max
shelves number
1
per set of sets
1 2
3 2
1 1
2 2
2 2
Max external Max RAW
capacity external
available capacity
2 8
(TB) (TB)
24 30
18 24
12 16
48 64
24 32