Brand new disks downgraded to 1.5Gps

[Dmitriyus]

According to the disk identity screen. 3 out of the 10, identical 20TB drives I just installed are being downgraded to 1.5Gps. They were all ordered direct from Western Digital. I've tried moving them around to different slots but it doesn't change anything. Thanks!

3 of the disk look like this:
 

Device model: WDC WD201KFGX-68BKJN0
Serial number: XXXXXXXXXX
LU WWN device id: 5 000cca 2edc10dea
Firmware version: 83.00A83
User capacity: 20,000,588,955,648 bytes [20.0 TB]
Sector sizes: 512 bytes logical, 4096 bytes physical
Rotation rate: 7200 rpm
Form factor: 3.5 inches
Device: Not in smartctl database 7.3/5440
ATA version: ACS-5 (minor revision not indicated)
SATA version: SATA 3.5, 6.0 Gb/s (current: 1.5 Gb/s) <<<<<<<<<<<<<<<-----------------
Local time: Fri Dec 8 12:47:10 2023 CST

Other 7 all show this as the only difference:

SATA version: SATA 3.2, 6.0 Gb/s (current: 3.0 Gb/s)

Hardware Info:
 

OS: Unraid 6.12.3
Chassis: SuperChassis 846BA-R920B
Motherboard: Supermicro X9DRH-7TF/7F/iTF/iF , Version 1234567890
Backplane 24-Port 4U SAS 6Gbps direct-attached backplane, support up to 24x 3.5-inch SAS2/SATA3 HDD/SSD
HBA card: Broadcom / LSI SAS2008 PCI-Express Fusion-MPT SAS-2 [Falcon] (rev 03) SAS/SATA
EXPANDER CARD: HP 487738-001
Memory: 112 GiB DDR3 Multi-bit ECC
PROCESSORS x2: Intel® Xeon® CPU E5-2680 v2 @ 2.80GHz
Mellanox Technologies MT26448 [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0)

 

Edited December 8, 2023 by Dmitriyus
ease of reading

[Vr2Io]

HP 487738-001 was 3Gbps expander, if disk connect to it, interface may run in 1.5G / 3G.

[Dmitriyus]

All of the sas breakout cables from the backplane are ran to the expander and then connected to the HBA from the expander.

[Vr2Io]

Change to 6Gb expander was the solution.

[Dmitriyus]

Is the HP 487738-001 known to do this or just a guess at what the problem is?

[JorgeB]

I have one and it works fine with the disks I have there, but they are older models, since it's an older expander it can have issues with newer disks, look for a firmware update, IIRC needs to be >2.08 to support SATA2, which yours should already be, if that doesn't help I would also recommend getting a newer expander.

[Dmitriyus]

If it was downgrading all 10 identical new disks I bought to SATA1 that would make sense, but 7 are functioning at SATA2 and 3 are stuck in SATA1. 

Edited December 9, 2023 by Dmitriyus

[JorgeB]

It can be related to the total number of devices connected, or maybe total number of that model.