Optical drives
The RD550 server models with 3.5-inch drives support the optical drive options listed in the following
table. Server models with 2.5-inch drive bays do not support an internal optical drive; a supported external
optical drive listed in the following table can be used instead.
Table 13. Optical drives
Description Part number
Maximum
supported
Internal optical drives
Lenovo ThinkServer Slim SATA DVD-RW Optical Disk Drive 4XA0F28607 1
Lenovo ThinkServer Slim SATA DVD-ROM Optical Disk Drive 4XA0F28608 1
External USB optical drives
ThinkPad UltraSlim USB DVD Burner 4XA0E97775 1
The Slim SATA DVD-RW Optical Disk Drive and the USB DVD Burner support the following types of media:
CD-R, CD-ROM, CD-RW, DVD-R, DVD-R (dual-layer recording), DVD-RAM, DVD-RW, DVD+R, DVD+R
(dual-layer recording), and DVD+RW.
The Slim SATA DVD-ROM Optical Disk Drive supports the following types of media: CD-R, CD-ROM, DVD-
R, DVD-R (dual-layer recording), DVD+R, DVD+R (dual-layer recording).
I/O expansion
The RD550 server supports up to two AnyFabric slots and up to three PCIe slots with riser cards that are
installed into two riser sockets on the system planar (one riser socket supports installation of one riser
card). The slot form factors are as follows:
Up to five slots for 2.5-inch drive bay models:
AnyFabric slot 1 (PCIe 3.0 x8) (system planar)
AnyFabric slot 2 (PCIe 3.0 x8) (system planar)
PCIe slot 1: PCIe 3.0 x8; low profile (Riser card 1)
PCIe slot 2: PCIe 3.0 x8; low profile (Riser card 1)
PCIe slot 3: PCIe 3.0 x16; low profile (Riser card 2; requires the second CPU to be installed)
Up to three slots 3.5-inch drive bays models:
AnyFabric slot (PCIe 3.0 x8) (system planar)
PCIe slot 1: PCIe 3.0 x16; low profile (Riser card 1)
PCIe slot 2: PCIe 3.0 x16; low profile (Riser card 2; requires the second CPU to be installed)
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