IBM x3650 M3 Product Manual page 16

These options have the following descriptions:
69Y4236 upgrades models with four hot-swap HDD bays to eight hot-swap HDD bays. This option

requires a ServeRAID M1015, M5014, or M5015.
59Y3825 upgrades models with eight hot-swap HDD bays to 16 hot-swap HDD bays. This option

includes a SAS expander card that fits into a dedicated RAID slot, and RAID controller occupies one
of the four PCIe slots, limiting the number of available slots to three.
69Y5034 upgrades models with eight hot-swap HDD bays to 16 hot-swap HDD bays. This option

includes two ServeRAID M5015 RAID controllers (without batteries). The number of available PCIe
slots is three.
59Y3806 upgrades models with eight hot-swap HDD bays to eight hot-swap HDD bays plus an

internal tape drive (DDS5, DDS6, or RDX). This includes the riser card with USB and SAS tape
connectors, replacing the standard SAS RAID riser card.
IBM System x3650 M3 16