Drive Ids - Lenovo System x3750 M4 Installation And Service Manual

SATA hard disk drives, 2.5-inch hot-swap SATA solid state drives, and 1.8-inch hot-swap SATA solid state
drives (see "Supported SAS/SATA drive backplane configurations" on page 57 for more information).
• You can mix 2.5-inch hot-swap SAS and SATA hard disk drives, 2.5-inch hot-swap SATA solid-state
drives, and 1.8-inch hot-swap SATA solid-state drives in the same server as long as you use the same
type of drives within the same array.
• When you are upgrading drive backplane configurations, you must install all 1.8-inch solid state drive
backplanes to the right of all 2.5-inch hard disk drive or 2.5-inch solid state drive backplanes. All 2.5-inch
backplanes must be installed to the left of all 1.8-inch backplanes. See "Drive IDs" on page 56 for drive
ID assignment information and "Supported SAS/SATA drive backplane configurations" on page 57 for
information about the combination of supported drive backplane configurations.
• The 8x2.5-inch hot-swap drive backplane with controller expander must be installed in backplane bays 3
and 4. See "Connecting the SAS cables" on page 64 for more information about cabling the SAS cables.
• The electromagnetic interference (EMI) integrity and cooling of the server are protected by having all bays
and PCIe slots covered or occupied. When you install a drive, save the EMC shield and filler panel from
the bay in the event that you later remove the device.

Drive IDs

Hot-swap-drive ID locations are described in this section.
The hot-swap-drive ID that is assigned to each drive is printed on the front of the server. The following
illustrations show the locations of the IDs of the drives. The ID numbers and the drive bay numbers are
the same.
Notes:
• The drive bay IDs can vary, depending on the combination of the SAS/SATA backplanes installed in
the server.
• When upgrading drive backplane configurations, you must install all 1.8-inch solid-state drive backplanes
to the right of all 2.5-inch hard disk drive or 2.5-inch solid-state drive backplanes. All 2.5-inch drive
backplanes must be installed to the left of all 1.8-inch drive backplanes.
• If you install a 8x1.8-inch drive backplane assembly, the drive IDs that are indicated on the server front
bezel will no longer be valid. Use the drive ID labels that come with the backplane to renumber the
drive IDs on the bezel.
• When you install a combination of 2.5-inch and 1.8-inch drive backplanes in the same server, the drive
bay ID numbering is reset by skipping bay ID numbers based on the number of 2.5-inch drive backplanes
that are installed to the left of the 1.8-inch drives backplanes. For example, if the server has a 4x2.5-inch
drive backplane and a 8x1.8-inch backplane configuration, the drive bay IDs of the four drives in the
4x2.5-inch drive backplane are 0 through 3. The drive bay IDs of the eight drives in the 8x1.8-inch
drive backplane start with an ID of 8 through 15. Since the drive bay IDs of the drives in the 4x2.5-inch
backplane are 0 through 3, the IDs reset and skip four ID numbers (because the first backplane supports
four drives). The drive IDs in the 8x1.8-inch drive backplane start with an ID of 8 through 15.
If a 8x2.5-inch drive backplane had been installed, instead of the 4x2.5-inch drive backplane, the IDs are
reset and skip eight ID numbers. The drive IDs of the drives in the 8x1.8-inch drive backplane would start
at 16 through 23. See the following example illustrations and the illustrations in "Supported SAS/SATA
drive backplane configurations" on page 57 for more information.
In the following illustration, the drive bay IDs are in sequential order because all of the drive backplanes
are 2.5-inch drive backplanes.
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Lenovo System x3750 M4 Installation and Service Guide