HDDs only show 1 at a time

[DonCamillo]

So i have a little problem with connecting my external HDDs. 
If i connect 1 of them it is recognized as SDC
https://imgur.com/lxLe2Oc

As soon as i connect the second one SDC vanishes and SDE shows up.

https://imgur.com/RQd9mn6
fdisk -l lists them just fine:

Disk /dev/sdc: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: U3              
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/sde: 7.28 TiB, 8001563222016 bytes, 15628053168 sectors
Disk model: U3              
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

however their serial number show up as beeing identical:
 

udevadm info --query=all --name=/dev/sdc | grep ID_SERIAL
E: ID_SERIAL=IB-1122-_U3_0000000048E5-0:0
E: ID_SERIAL_SHORT=0000000048E5
udevadm info --query=all --name=/dev/sde | grep ID_SERIAL
E: ID_SERIAL=IB-1122-_U3_0000000048E5-0:0
E: ID_SERIAL_SHORT=0000000048E5

inside unraid they SDC shows this:
https://imgur.com/3rB7e7H

inside unraid they SDE shows this:

https://imgur.com/ZGhnQr7


Both are connected via USB with this thingy:
https://www.amazon.de/dp/B085LTKD2S?psc=1&ref=ppx_yo2ov_dt_b_product_details
going from the description name `IB-1122-U3` it seems like linux recognizes the adapter as the HDD, while unraid itself manages to differentiate the HDD, but cant get them mounted correctly. is there any way to get this fixed?

[trurl]

Should be OK to use them one at a time as Unassigned Devices. 

 

USB not recommended for assigned disks for many reasons. 

[DonCamillo]

nope, both at a time wont show up as unassigned drives. as soon as both are connected i get this in the log and SDC is replaced with SDE.
 

emhttpd: device /dev/sdc problem getting id

anyhow. my setup i'm using only has 1 sata and 1 nvme slot, which both are used for my cache. so the only option is to use external USB-drives or SATA drives with adapters. 

Edited May 21 by DonCamillo

[JorgeB]

31 minutes ago, DonCamillo said:

nope, both at a time wont show up as unassigned drives

This is normal because both report the same serial, this can happen with USB bridges, and Unraid requires unique serials.

[DonCamillo]

any way to identify via ID_PART_TABLE_UUID instead of ID_SERIAL?

 

[JorgeB]

Not AFAIK.