So far i’ve tried 3 different sd card readers, each one works fine in my other switch
I’ve also tried multiple micro sd cards and they have their expected speed in the other switch
Lastly even though the connector on the board looked fine and all the pins tested fine I went ahead and replaced it with a brand new connector and it did not solve the issue.
As far as i can tell there are no issues with the 4 data lines, each one has about 2m resistance to ground and has continuity from the pad to the top of the pin on the connector
This is a v2 board with a rp2040 installed, I wonder if it could be one of the solder points on the flex cable because I am sure when I first grabbed a nand backup it was done in 13 minutes and the emunand was made in half the time vs how long it took yesterday (33 minutes) when I wiped the sd card thinking that was the issue
Went over the two points and they appear fine on the mod chip flex cable
Is it normal for the SNS line to ground when a micro sd card is inserted into the reader?
Also in the sd card hekate page, I see the following regardless of the card reader I use
SDMMC1 Errors:
Init fails: 1 (0)
Read/Write fails: 0 (0)
Read/Write errors: 0 (0)
Yes I’ve tried different sd cards, they run at full speed in my other test switch
I’ve also tried 3 sd card readers that all read at full speed in the other switch
The data line traces go straight to the apu so I don’t know what else to check, I don’t have another had-cpu-01 board to compare resistance readings
Would a poor clk signal from the apu cause this? I don’t have an oscilloscope to test it
honestly not too sure on the clock signal relating to the card reader, but there is not much to check on these things as they interface directly with the APU. Maybe double check the FPC connector and see if there are any issues with missing pins or bad connection.
I replaced the connector even though I found no issues with the original one, all the pins are solid and as far as I can tell should make contact with the readers pins, I could try to run 4 jumper wires from the connectors data lines straight to a card reader but it is small and sounds like a hassle
Anyone with a HAD-CPU-01 able to let me know how much resistance to ground the sd card connectors VCC line has?
This board has upwards of 2m+ resistance (black probe on ground)
while a HAC-CPU-01 board I have has a resistance of 10k on that line
While the switch is on the line does have 3.3v in any case
Thanks, my resistance is a good amount higher but since the connector receives its 3.3v i doubt this rail is the issue, earlier boards have a 10k resistor to ground on this line which is why I measured 10k on my earlier boards
I bought a different brand of micro sd card and the issue has been resolved.
For some reason this switch doesn’t like silicon power sd cards, I tried multiple SP cards and they all have poor speeds
I replaced it with a patriot micro sd card and get the expected ~80 Mib/s
The SP cards run at full speed in my two other switches
Changed sd card with same results however i dont notice any slow speeds the only issue is i have to use hekate v4.6 to read and verify the emmc as the latest version always fails to verify aroung 69% no matter what brand i use. ive ruled out any issue with the sd card reader connection
Any ideas? Could is be the emmc itself i have a spare 64gb samsung and a t48 emmc programer but dont really want to swap the 32gb if its not the issue
