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

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Date:	Fri, 09 Jan 2015 13:46:28 +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 #43 from Jun Itou <itou_jun@...oseek.jp> ---
When even 3.2.62 reboots an HDD in power supply on, it is "write through".
It only becomes "write back" when I reset an HDD.
Will it be that a bug of the material came to the front?
Only a controller of D8927GC-002 becomes "write back" when I initialize it, is
it the thing which it is not possible for in "write through" at the time of
recognition somehow?

root@...server:~# uname -a
Linux sv-server 3.2.62 #1 SMP Fri Jan 9 19:06:10 JST 2015 x86_64 GNU/Linux
root@...server:~# cat /sys/block/sdb/device/scsi_disk/*/cache_type
write through
root@...server:~# udevadm info --query=path --name=/dev/sdb
/devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/host3/target3:0:0/3:0:0:0/block/sdb
root@...server:~# echo -n "1-1" > /sys/bus/usb/drivers/usb/unbind
root@...server:~# echo -n "1-1" > /sys/bus/usb/drivers/usb/bind
root@...server:~# cat /sys/block/sdb/device/scsi_disk/*/cache_type
write back

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