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Bug#1144113: linux-image-6.12.94+deb13-arm64: Kernel fails to read external SSD drive

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Hi John,

On Tue, Aug 11, 2026 at 11:23:43AM +0100, John Rowley wrote:
> Package: src:linux
> Version: 6.12.94-1
> Severity: important
> X-Debbugs-Cc: debian-arm@lists.debian.org, dpkg@johnrowley.me
> User: debian-arm@lists.debian.org
> Usertags: arm64
> 
> Hi,
> 
> After rebooting into 6.12.94+deb13-arm64, I noticed my external USB SSD drive
> wasn't present anymore, I checked journalctl to see:
> 
>   Apr 13 19:38:08 pi.home kernel: sd 0:0:0:0: [sda] 3907029168 512-byte logical blocks: (2.00 TB/1.82 TiB)
>   Apr 13 19:38:08 pi.home kernel: sd 0:0:0:0: [sda] Write Protect is off
>   Apr 13 19:38:08 pi.home kernel: sd 0:0:0:0: [sda] Mode Sense: 24 00 00 00
>   Apr 13 19:38:08 pi.home kernel: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
>   Apr 13 19:38:08 pi.home kernel:  sda: sda1 sda2
>   Apr 13 19:38:08 pi.home kernel: sd 0:0:0:0: [sda] Attached SCSI disk
>   Apr 13 19:38:16 pi.home kernel: sd 0:0:0:0: [sda] Synchronizing SCSI cache
>   Apr 13 19:38:16 pi.home kernel: sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
> 
> Some quick searching revealed this could be due to a failing drive, but after
> booting back into my previous kernel (6.12.86+deb13-arm64), the drive came
> back and appears to be working fine again.
> 
> I've checked the drive's health using smartmontools and everything seems okay,
> the drive doesn't seem to be failing at all. It doesn't support SMART
> self-tests, so I couldn't run any of those.
> 
> I assume this could be an upstream bug but I can't find anything that matches
> my circumstances exactly.
> 
> Drive is a Crucial X9 Pro 1TB Portable SSD (model: CT2000X9PROSSD9).

6.12.94-1 is not the most current kernel for Debian trixie, can you
pleae update to 6.12.101-1 and report back if you still encounter the
problems?

Can you please in such case provide the full context of Kernel log?

Regards,
Salvatore

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Bug#1144113: linux-image-6.12.94+deb13-arm64: Kernel fails to read external SSD drive John Rowley <dpkg@johnrowley.me> - 2026-08-11 12:40 +0200
  Bug#1144113: linux-image-6.12.94+deb13-arm64: Kernel fails to read external SSD drive Salvatore Bonaccorso <carnil@debian.org> - 2026-08-11 13:00 +0200

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