linux-ext4 - [Bug 89511] USB-storage mount error

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Message-ID: <bug-89511-13602-IxFzIxiNFV@https.bugzilla.kernel.org/>
Date:	Sun, 07 Jun 2015 10:22:22 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 89511] USB-storage mount error

https://bugzilla.kernel.org/show_bug.cgi?id=89511

--- Comment #52 from Markus Rathgeb <maggu2810@...il.com> ---
> This is up to the SCSI developers.

So, could we CC someone?

So, if we keep the current situation everyone who ones such a buggy hardware
have the following options (IMHO):
1. create a udev rule, that sets "write through" for this hardware
2. using non-journal filesystems only
3. do not use this hardware anymore

But I think all that options are not good ones.

The udev rule will work on my machines then, but a USB drive is designed to be
mobile. And a mobile storage will be used on other machines, too, without
change some system stuff on that (missing permissions, ...).

I could understand if someone states that the hardware is buggy and there is
nothing to do. But I think this does not fit to the Linux Kernel. The kernel is
filled with a lot workarounds for hardware / implementations that is not
correct.

Could someone contact a SCSI developer, perhaps that stuff could comment their
ideas (e.g. for "if SYNCHRONIZE CACHE command is not working, fallback to write
through" and "what should happen when a drive really does have a write cache
but doesn't recognize the SYNCHRONIZE CACHE command").

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