January 24, 20233 yr http://iocrest.com/index.php?id=2335 Just following up from discussions on other M.2 multi-port SATA HBAs that are deemed ok like ASmedia ASM1166 and JMicron JMB585, and looked around to see if an 8 port SATA M.2 existed. Hard to tell what chipset is on this little guy. Edit: Found the Aliexpress direct URL that is broken on the iocrest description page: https://www.aliexpress.us/item/3256804231379766.html?gatewayAdapt=glo2usa4itemAdapt&_randl_shipto=US A purported buyer left this review; "JMB585 + JMB575 combination. not dual 585 card." Edited January 25, 20233 yr by Fragbert
January 25, 20233 yr 6 hours ago, Fragbert said: JMB575 that's a port multipler and it is not recommended
July 15, 20232 yr If I'm reading this right: Quote After some research, I’ve learned that the JMB585 is the HBA, while the JMB575being a port-multiplier. This is a very common setup in server storage configuration - an HBA paired with a port multiplier. My old R730xd has a PERC card connected to a backplane, which is the port multiplier part. I am intrigued to see that this kind of configuration can be achieved in such a small form factor. Nonetheless, nothing is perfect. While it provides 8 SATA 6Gb/s ports, it does come with compromises. In this technical document from JMicron, the manufacturer of both of these chips, the JMB585 is a PCIe 3.0 x2 to 5 SATA 6Gb/s chip. If it’s only five ports, where do rest of the three come from? The answer lies with the JMB575 chip, which acts as a multiplier by using one of the SATA ports that the JMB585 has, and multiply that to four more SATA ports. one of the two connectors may offer 4 ports from the JMB585.
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