Because of this dense layout, there is no space left on the motherboard for an Ultra M2 drive, although this is where it would be very useful for caching I / o operations, or for the operating system, if you plan to install Windows. For Linux, VMware and FreeBSD, there is an internal USB 3.0 Type A port where you can install a low USB flash drive with bootloader and OS kernel.
The Board has a large number of connectors and a whole block of jumpers. Here are just a few:
Pins for connecting the NMI button (a softer alternative to reset)
- A module for connecting the TPM
- Thermocouple connection sensor (TR1)
- Output to front VGA port
- Output to two USB 3.0 ports
- Output to two USB 2.0 ports
Rebooting through the NMI is a softer alternative to reset, as it helps to avoid data loss when writing heavily to the disk.
One network port LAN1 allocated for the needs of remote management of the BMC. Remote monitoring is assigned to the Aspeed AST2400 chip (network controller – Realtek RTL8211E), the most common server solution for the current day. In fact, although the Board is declared as a 3-port, there are two active network ports here, but their total speed of 20 Gbit/s will be more than enough for the next 5-6 years.
It should be noted that although the motherboard has 3 PCI Express 3.0 slots, they share the data bus with the following restrictions:
- Upper PCI Express 3.0 16x (PCIE5 slot) when you turn on the SAS controller LSI3008, goes from 16x mode to 8x mode.
- The bottom PCI Express 3.0 16x (slot PCIE7) shares 8 lanes with the middle slot PCI Express x8 (PCIE6), so when you connect there expansion Board switches to 8x.
The form factor of the average pcie6 slot allows you to install long expansion cards designed for 16x, but when you install the motherboard for its intended purpose, in the cloud storage, most likely all three slots will remain empty, since there is simply nothing to put in them: everything you need is already integrated on the motherboard.with such a tight layout, there is no space left on the motherboard for an Ultra M2 drive, although this is where it would be very useful for caching I / o operations, or for the operating system, if you plan to install Windows. For Linux, VMware and FreeBSD, there is an internal USB 3.0 Type A port where you can install a low USB flash drive with bootloader and OS kernel.
The processor socket has a Narrow ILM format, which is important to consider when choosing a cooler. For outdoor servers you can find on sale cooling system Noctua NH D9DX i4 height 3U. With low-profile coolers, in General, there are no problems – for 2U cases you can use Supermicro SNK-P0048AP4, and for 1U – Dynatron T318 or Dynatron R31.
The motherboard has 4 DDR4 RDIMM/LRDIMM slots with frequencies 1600/1866/2133 MHz and 2400 MHz for Xeon E5-1600/2600 V4 processors. The maximum supported capacity of one RDIMM module is 32 GB and that of the LRDIMM module is 64 GB. If we assume that on 1 TB of disk space it is desirable to have 1 GB of RAM for cache and deduplication tables, then this will be enough for 1U case, clogged with 12 hard drives of 21 TB each.
We would like to note the support of 6 fans, each of which is connected to a 4-pin PWM socket with led indication. If the cooler stops, a red light will light up near the PWM connector. The automatic adjustment of the CPU cooler usually keeps the fan speed at a minimum.
On the back panel only a minimum set of outputs: two USB 2.0, two USB 3.0, three RJ45, VGA, RS232 ports and a UID indicator.