Bug#1086230: linux: LTFS mount failure on ATTO H680 due to possible pm80xx driver SCSI length mismatch

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From	Joseppe <joseppe.mayer19@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1086230: linux: LTFS mount failure on ATTO H680 due to possible pm80xx driver SCSI length mismatch
Date	Tue, 29 Oct 2024 10:40:01 +0100
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Source: linux
Version: src:linux
Severity: normal
X-Debbugs-Cc: joseppe.mayer19@gmail.com

Dear Maintainer,

I’m reporting an issue encountered with LTFS on Debian 12 using the ATTO ExpressSAS H680 HBA, potentially due to a compatibility problem with the pm80xx driver.

Problem Details:

What led up to the situation?

Attempting to mount a tape with LTFS using the ATTO ExpressSAS H680 HBA.

What exactly did you do (or not do) that was effective (or ineffective)?

Executed a standard LTFS mount operation, which consistently fails when attempting to read the tape index during the mount process.

What was the outcome of this action?

LTFS outputs the following error message, suggesting an issue with SCSI data transfer length handling:

LTFS30216W Length mismatch is detected. (Act = 524288, resid = 0, resid_sense = 523235).

As a result, the tape fails to mount.

What outcome did you expect instead?

I expected LTFS to mount the tape without issues, as it does on macOS with the ATTO vendor-specific driver.

Additional Information:
The same hardware works without issues on macOS, which suggests a potential bug or missing feature in the pm80xx driver regarding SCSI data transfer length handling for this device.

Please let me know if further information or testing is needed.



-- System Information:
Debian Release: 12.7
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.8.12-2-pve (SMP w/16 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8), LANGUAGE=en_US.UTF-8
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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Bug#1086230: linux: LTFS mount failure on ATTO H680 due to possible pm80xx driver SCSI length mismatch Joseppe <joseppe.mayer19@gmail.com> - 2024-10-29 10:40 +0100
  Bug#1086230: linux: LTFS mount failure on ATTO H680 due to possible pm80xx driver SCSI length mismatch joseppe mayer <joseppe.mayer19@gmail.com> - 2024-10-29 11:20 +0100
  Bug#1086230: linux: LTFS mount failure on ATTO H680 due to possible pm80xx driver SCSI length mismatch Salvatore Bonaccorso <carnil@debian.org> - 2024-10-29 11:20 +0100
  Processed: Re: Bug#1086230: linux: LTFS mount failure on ATTO  H680 due to possible pm80xx driver SCSI length mismatch "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-10-29 11:20 +0100
  Bug#1086230: marked as done (linux: LTFS mount failure on ATTO  H680 due to possible pm80xx driver SCSI length mismatch) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-11-02 15:40 +0100

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