Disk Drives In Carriers (Ddics) (5U Enclosures) - Lenovo Storage D1212 Hardware Installation And Maintenance Manual

Disk Drives in Carriers (DDICs) (5U Enclosures)

Each drive is housed in a carrier (see Figure 36 "A Disk Drive In Carrier (DDIC)" on page 31) that enables
secure insertion of the drive into the drawer and contains the appropriate transition card:
• SAS carrier transition card.
DDIC Population Rules
• The minimum number of drives that a chassis can support is 14.
• Drives must be added in rows (14 drives at a time).
• Install drives successively by number and alternately between the top drawer and the bottom drawer.
Namely install first at slots 0 to 13 in the top drawer and then at slots 42 to 55 in the bottom drawer. After
that, install at slots 14 to 27, and so on. For DDIC slot numbers, seeFigure 19 "Drive Location" on page 16.
– The number of rows must not differ by more than one row between the top and bottom drawers.
– Population of rows should start from the front of the enclosure.
• Always install solid-state drives (SSD) firstly.
• Hard disk drives (HDD) and SSDs can be mixed in the same drawer.
• Drives in the same row should be the same form factor (2.5 inch or 3.5 inch).
Note: When mixing SSDs and HDDs in the top front row (slot 0 - slot 13), up to four SSDs can be installed
in the first four slots (slot 0 - slot 3).
• HDDs in the same row must have the same rotational speed.
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Lenovo Storage D1212/D1224/D3284Hardware Installation and Maintenance Guide