From: Christoph Hellwig <hch@infradead.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Jeff DeFouw <mrj@plorb.com>,
"James E.J. Bottomley" <JBottomley@parallels.com>,
linux-scsi@vger.kernel.org, usb-storage@lists.one-eyed-alien.net
Subject: Re: [usb-storage] Re: 3.16 commit 89fb4cd errors on drives without SYNC CACHE
Date: Fri, 21 Nov 2014 02:17:33 -0800 [thread overview]
Message-ID: <20141121101733.GA23135@infradead.org> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1411201008290.1061-100000@iolanthe.rowland.org>
> usb-storage sets wce_default_on only for devices that are marked with
> the US_FL_WRITE_CACHE quirk flag. Currently only two devices have that
> flag: the Seagate Portable HDD (vendor ID 0x0bc2, product ID 0x2300)
> and the Western Digital My Password HDD (vendor ID 0x1058, product ID
> 0x070a).
So Jeff has a drive that on its own claims WCE=1 but doesn't support
SYNCHRONIZE_CACHE(10). I'm not sure what to do about it as it sounds
inherently dangerous.
next prev parent reply other threads:[~2014-11-21 10:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-16 1:14 3.16 commit 89fb4cd errors on drives without SYNC CACHE Jeff DeFouw
2014-11-20 6:42 ` Christoph Hellwig
2014-11-20 15:11 ` [usb-storage] " Alan Stern
2014-11-21 10:17 ` Christoph Hellwig [this message]
2014-11-21 15:08 ` Alan Stern
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