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connecting Multiple Expansion Shelves
ExPanSion ShElF cablinG
The system supports any combination of 15 and 30 TB ES30 shelves up to
a maximum of 56 shelves or 1680 TB of raw storage. Multiple expansion
shelves are connected together and to the controller with qualified SAS
cables. Save extra SAS cables for future shelf expansion.
ES30 Expansion Shelves
4 Use a SAS cable with mini-SAS connectors for any ES30 SAS connection.
These are keyed and marked. For the Host HBA, use the end.
4 Cables should be dressed to the side of the rack and supported with
velcro straps to allow for easy removal of a controller or power supply.
4 In the DD990 the strings are not contiguous. The order of shelf addition
is designed for easy expansion from a standard DD990 system and to
(nearly) fill a rack before adding the next rack. The gaps in the racks are
positioned to create a standard expansion rack that is just re-cabled based
on its rack number position.
hot aDDition oF ExPanSion ShElvES
Add shelves following the instructions in the Install Hardware section. The
ES30 uses the markings to indicate a HOST port and to indicate an
EXP'N port. Cabling between adjacent shelves in a string is done with the 1M
SAS cables that are delivered with the shelves. Cable from the B Controller
EXPANSION port of lower shelf to the B controller HOST port of the next
higher shelf in the string. Then cable from the A Controller HOST port of
lower shelf to the A controller EXPANSION port of the next higher shelf.
When adding shelves to an existing string, move the cable from the B
controller HOST port to the new shelf. Then add the shelf-to-shelf 1M
cables. 5M cables are used to provide the maximum flexibility. Loop any
excess and use the Velcro straps to attach to a convenient place in the rack.
The first 24 shelves that are added are the first 4 shelves in strings V1-V6.
The third rack adds shelves 5 to 7 of strings V1, V4, V6, and V5, in that order
(V1.5, V1.6, V1.7, V4.5, V4.6, and so on). Instead of using 1M cables for
the shelf-to-shelf connections between shelves 4 and 5 of these strings, 5M
cables are necessary.
FiGurE 4: rEcoMMEnDED ES30 cablinG DiaGraM
cablinG inStructionS
String HBA port Shelf port
1
9A
1
5B
2
8B
2
5A
3
9B
3
4A
4
5D
4
9C
5
5C
5
8C
6
9D
6
4D
7
8A
7
4B
8
4C
8
8D
The fourth rack first adds the seven 7 shelves of string V7 and then shelves 5-7
of strings V3 and V2, in order. The fifth rack only has the 7 shelves of string V8.
Power-up and Final configuration
4 Power on the expansion shelf or shelves using the instructions in the
Install Hardware section.
4 Use the storage add enclosure when ready to put the enclosure
into use and expand the capacity of the system. The enclosure-id is
always 2 for the first added shelf, and 3 for the second. The Data Domain
controller always has the enclosure-id of 1 (one).
storage add tier active|archive enclosure
enclosure-id
(matches factory configuration)
EMC DATA DOMAIN DD990 WITH DD EXTENDED RETENTION INSTALLATION AND SETUP GUIDE | SIDE 1
B controller HOST port of shelf V1.1
A controller HOST port of the highest number shelf in V1 2M/3M
B controller HOST port of shelf V2.1
A controller HOST port of the highest number shelf in V2 2M/5M
B controller HOST port of shelf V3.1
A controller HOST port of the highest number shelf in V3 2M/5M
B controller HOST port of shelf V4.1
A controller HOST port of the highest number shelf in V4 3M/5M
B controller HOST port of shelf V5.1
A controller HOST port of the highest number shelf in V5 3M/5M
B controller HOST port of shelf V6.1
A controller HOST port of the highest number shelf in V6 3M/5M
B controller HOST port of shelf V7.1
A controller HOST port of the highest number shelf in V7
B controller HOST port of shelf V8.1
A controller HOST port of the highest number shelf in V8
NOTE:
This guide describes the installation
of new systems comprised of all-ES30
shelf models. Configurations including a
mix of ES20 and ES30 shelves are subject
to additional configuration constraints.
The instructions for mixing ES30 and ES20
shelves are in the ES30 Hardware Guide.
Length
2M
2M
2M
3M
3M
3M
2M
5M
5M
5M
NOTE:
In Figure 4 the
shelves are labeled
VN.M. VN refers to string
"N" and the "M" is the
number of the shelf in
the string. For example,
V3.2 refers to the second
shelf in the third string.
The cabling and racking
are designed so that
shelves are added from
the bottom up in a rack.
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