Dell EMC Data Domain FS15 SSD Shelf Hardware Manual page 45

System Minimum
appliance shelf
count
4200 1
(192)
4500 2
(288)
7200 3
(384)
The maximum number of shelves displayed in the product's cabling table cannot be
l
exceeded.
You cannot have more than four ES20s in a single set (maximum preference is
l
three).
You cannot have more than five ES30s in a single set (maximum preference is
l
four).
You can have a maximum of seven ES30s for systems with Extended Retention
l
software.
There are no specific placement or cabling requirements for the metadata shelves
l
for DD Cloud Tier configurations. These shelves can be installed and cabled the
same way as standard ES30 shelves.
Note
An ES20 requires more power than an ES30. Ensure that your rack is configured to
handle the power needs.
The tables below show how to configure a mixed system. To use the tables, go to the
appropriate system. Then find the number of ES20s that are to be configured in the
first column. The next column defines the number of ES20 sets. If there are multiple
rows with the same number of ES20s then pick the row with the appropriate number
of ES20 SATA shelves. The next column in that row defines the number of sets of
ES30 SATA shelves. Finally, there may be entries for the number of desired ES30 SAS
shelves and the number of sets to be used.
If the combinations of shelves exceed the supported usable storage, there may not be
an entry. The entries are based on the smallest usable storage per shelf type (12TB for
ES20, 12 TB for ES30 SATA, and 24TB for ES30 SAS). Always check that the sum of
the usable storage of all of the shelves does not exceed the supported usable storage
of the configuration.
Table 20 Minimum and maximum configurations
Maximum appliance DD Cloud Tier
shelf count systems in TB
16
l
l
20
l
l
20
l
l
Systems without Extended Retention or DD Cloud Tier all support four chains. The
following tables show combinations of ES20 and ES30 shelves. For combinations of
any two types of shelves, these tables can be used as a guide.
Extended Retention
systems (ER) in TB
189 DD OS 5.4 and earlier: 576
l
90 for DD OS 5.5 and later: 385
l
metadata
285 DD OS 5.4 and earlier: 1152
l
120 for DD OS 5.5 and later: 576
l
metadata
428 DD OS 5.4 and earlier: 1728
l
240 for DD OS 5.5 and later: 768
l
metadata
DD4200, DD4500, and DD7200 cabling
Installing the Shelves
Max shelves
for ER
32
40
56
45