<story><title>Build a Raspberry Pi CM4 4-Bay NAS with Wiretrustee Carrier Board</title><url>https://www.cnx-software.com/2021/02/01/build-a-raspberry-pi-cm4-4-bay-nas-with-wiretrustee-carrier-board/</url></story><parent_chain></parent_chain><comment><author>geerlingguy</author><text>There are a few people currently working on NAS boards based on the CM4. A few different approaches in terms of chipsets used and performance targets.&lt;p&gt;I&amp;#x27;m trying to track them in this GitHub issue [1] but a couple people have remained more or less anonymous as they don&amp;#x27;t want to attract attention too early.&lt;p&gt;The single PCIe lane is the biggest limitation if you&amp;#x27;re looking for raw speed (350 MB&amp;#x2F;sec is kind of the upper real-world sustained transfer limit), though since the gigabit Ethernet port is on a different interface, you can still expect to get 80-100 MB&amp;#x2F;sec network transfer speeds.&lt;p&gt;Something like this, with the right case and OMV or other adequate software would be a relatively competitive replacement for low-end NASes.&lt;p&gt;I&amp;#x27;m also exploring building a 2.5G NAS with a CM4, but the PCIe bus speed limitation is what kinda hamstrings that. Hopefully the next Pi revision has a 4x (at least) lane, like the RockPro64.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;github.com&amp;#x2F;geerlingguy&amp;#x2F;raspberry-pi-pcie-devices&amp;#x2F;issues&amp;#x2F;25&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;github.com&amp;#x2F;geerlingguy&amp;#x2F;raspberry-pi-pcie-devices&amp;#x2F;iss...&lt;/a&gt;</text></comment>
<story><title>Build a Raspberry Pi CM4 4-Bay NAS with Wiretrustee Carrier Board</title><url>https://www.cnx-software.com/2021/02/01/build-a-raspberry-pi-cm4-4-bay-nas-with-wiretrustee-carrier-board/</url></story><parent_chain></parent_chain><comment><author>smarx007</author><text>Nothing against cool RPi projects but be aware that a motherboard with a NAS-grade Celeron, like ASRock J4105M, sells for $85 or so (but needs RAM, $20 for 4GB roughly). At $105, this leaves this carrier board around $35 of budget if you can get RPi CM4 4GB for $70. Plus all the doubts about reliability mentioned above.</text></comment>