Other Parts Discussed in Thread: TMUXHS4412, , DS160PR412
Hi TI Team,
We are meeting SSD detection issue with a M.2 NVMe SSD when we are using TI MUX (TMUXHS4412) .
We have tried to change from MUX to re-driver MUX (DS160PR421 / DS160PR412 ) that looks can solve this 8TB SSD detection issue.
But some of SSDs became abnormal from normal detected by MUX. You can review below result that difference with W/o & with re-driver.
And the re-driver level that we set at Tx Level：2 & Rx Level：0. Could you help us to understand how to solve this kind of seesaw effect.
| W/o Re-driver: TMUXHS4412 PCIE MUX | ||||||
| SSD | Capacity | SSD controller | NAND Flash | SSD Spec. | Result | |
| OWC 8T SSD | 8TB | PHISON PS5018-E18-41 | TA81G85AYV | R：6500MB/Sec W：7200MB/Sec |
|
|
| Samsung 980 Pro | 2TB | Samsung Elpis S4LV003 | Samsung 136-Layer 3D V-NAND TLC | R：6900MB/Sec W：7450MB/Sec |
Link OK R：2545 / W：3221 |
|
| Samsung 990 Pro | 2TB | Samsung S4LV008 (Pascal) | Samsung 176-Layer 3D TLC V-NAND v7 / K9DVGY8J5D-DCK0 |
R：6900MB/Sec W：7450MB/Sec |
Link OK R：2524 / W：3186 |
|
| With Re-driver: DS160PR412RUAR & DS160PR421 PCIE Re-device Tx Level：2 & Rx Level：0 | ||||||
| SSD | Capacity | SSD controller | NAND Flash | SSD Spec. | Result | |
| OWC 8T SSD | 8TB | PHISON PS5018-E18-41 | TA81G85AYV | R：6500MB/Sec W：7200MB/Sec |
|
|
| Samsung 980 Pro | 2TB | Samsung Elpis S4LV003 | Samsung 136-Layer 3D V-NAND TLC | R：6900MB/Sec W：7450MB/Sec |
Can't be detected SSD | |
| Samsung 990 Pro | 2TB | Samsung S4LV008 (Pascal) | Samsung 176-Layer 3D TLC V-NAND v7 / K9DVGY8J5D-DCK0 |
R：6900MB/Sec W：7450MB/Sec |
Can't be detected SSD | |
