[Bug 291915] server hung, login hangs on [zfs]

[email protected] Tue, 21 Jul 2026 09:36:06 +0000

Newsgroups	gmane.os.freebsd.bugs
Message-ID	<[email protected]/bugzilla/>

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291915

Dave Cottlehuber <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Not A Bug

--- Comment #2 from Dave Cottlehuber <[email protected]> ---
This has taken a while to track down, but it appears to be buggy firmware
and/or controllers in some batches of Samsung NVMe drives, disconnecting
completely from the bus:

- Samsung SSD 990 PRO 2TB 0B2QJXG7
- Samsung SSD 990 PRO 4TB 0B2QJXG7

They're not disconnecting due to excessive heat; Samsung advises applying
https://semiconductor.samsung.com/consumer-storage/support/tools/ the December
2025 update is supposed to help address this.

*(8B2QJXD7) To improve read-operation stability. (Release : December 2025)
*(7B2QJXD7) To address the intermittent non-recognition and blue screen issue.
(Release: September 2025)
*(4B2QJXD7) To address reports of high temperatures logged on Samsung Magician.
(Release: December 2024)

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