vonericsen
commented
2 days ago Hi @putnam,
Sorry you are having issues in your system. To make sure I am following your issue this is what you have seen happening:
- Installed new drives, started seeing resets during heavy loads
- Disabled EPC and seemed to resolve it
- Resets are back
Is this correct?
From the standards, disabling EPC should hold across resets and power cycles. Are you seeing that the EPC feature is being enabled again even when you have not sent the enable?
As for firmware updates, sometimes those can help (both HBA side and drive side). From the Seagate support site there is a Firmware update finder that you can provide a serial number to check for new firmware. You don't need the other Windows only tool (it basically scans and opens that webpage for you with the SN already loaded). If you scroll to the bottom of this page you can provide a serial number of a drive to check for newer firmware. I don't know if that would resolve the issue, but you can try it.
I am asking around to see if any of the customer support engineers have run into this as well, but I have not heard anything yet.
putnam
I have a bunch (11 each) of ST24000NM000C and ST16000NM001G drives that cause major issues with my SAS3008-based HBA (the onboard HBA on the Supermicro H12SSL-CT, but also just on a regular 9300-8i). Specifically the HBA hits some failure mode under heavy write loads to these new X24's and the driver triggers a whole HBA reset. Heavy reads seem to not be affected.
The X18 default EPC settings vary vs. the X24's. They seem to have Idle_A set to 1 and Idle_B set to 1200; the X24 firmware only has Idle_A set to 1. The first time I saw this occur, I disabled EPC on the new X24's with --EPCfeature disable, and I thought it was resolved, but the next time I had a pretty sustained write load it happened again.
I didn't have this issue when it was purely the X18 disks on this adapter. It was only once the X24s were added to the mix that I saw this occur. It also does not occur with HGST/WD disks.
All X18 disks are on SN02, except one RMA refurbed ST16000NM000J on SN04. All X24 disks are on SN02. The SAS3008 HBA is on 16.00.14.00. It is actively cooled and temp is monitored and not overheating. Disks are all attached on a Supermicro 846 SAS3 backplane/LSI expander on 66.16.11.00. Kernel is 6.10.11-amd64, current Debian testing/trixie.
Here's dmesg during a heavy write load triggering the problem:
I contacted Seagate support and uh, they told me to install some Windows-only software to monitor for firmware updates and didn't know how to respond to anything technical at all. So I hope maybe through you guys this info is useful.