[LSI 9261 8i + BPN-SAS-846EL1 SAS Expander - SATA3 6Gbps Disks Running at only 1.5Gbps]

3 hours ago, ijuarez said:

Looks like your hardware should do the 6GB, what's the model of the 4TB you added?

Those are Western Digital (WD) Purple Disk 4TB SATA6Gb/s 64M Surveillance Hard Drive (WD40EJRX). 

[LSI 9261 8i + BPN-SAS-846EL1 SAS Expander - SATA3 6Gbps Disks Running at only 1.5Gbps]

4 minutes ago, ijuarez said:

Post what your system is

your backplane may only be able to do 3 and is reducing the speed of the disk because its too fast.

 

 

 

Hi ijuarez,

 

MB: Supermicro X10SLL-F

CPU: Intel Xeon E3-1240L V3

RAM: Dual Samsung 8Gb DDR3 ECC

Chassis: Supermicro SC846 with BPN-SAS-846EL1 Backplane

HBA: LSI 9261 8i

OS: Windows Server 2016 Standard

 

Thank you.

 

B.C.

 

 

[LSI 9261 8i + BPN-SAS-846EL1 SAS Expander - SATA3 6Gbps Disks Running at only 1.5Gbps]

Hi all,

 

Recently I added some 4TB WD SATA3 6Gbps disks into my raid system. It works but only runs at 1.5Gbps. MegaRaid Storage Manager shows me that the "Drive Speed" is 6.0Gbps and the "Negotiated Link Speed" is 1.5Gbps.

 

Then I tried to put some HGST 2TB SATA3 disks into the system. They also ran at 1.5Gbps.

 

However, I have a bunch of 640G WD6401AALS disks (very old) running at 3Gbps for almost a decade.

 

Is there any configuration that I need to change? Or it's just that the link speed of new generation hard drives is limited by my backplane/HBA.

 

Thank you.

 

B.C.