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From: Steven Scholz <steven.scholz@imc-berlin.de>
To: linux-ide@vger.kernel.org
Subject: when are buffers/caches flushed?
Date: Thu, 18 Aug 2005 12:51:03 +0200	[thread overview]
Message-ID: <43046817.803@imc-berlin.de> (raw)

Hi there,

According to an (old) man page of sync(2)

        According to  the  standard  specification  (e.g.,  SVID),
        sync()  schedules  the  writes,  but may return before the
        actual writing is done.   However,  since  version  1.3.20
        Linux  does actually wait.  (This still does not guarantee
        data integrity: modern disks have large caches.)

How about recent kernels? Does sync() block until buffers are flushed?
How can I find out if the disk caches are actually flushed?

I want to make sure that all data is flushed to my disk drive before powering 
down the system.

Thanks.

--
Steven


             reply	other threads:[~2005-08-18 10:51 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-08-18 10:51 Steven Scholz [this message]
2005-08-18 11:24 ` when are buffers/caches flushed? Tejun Heo
2005-08-18 11:34   ` Steven Scholz
2005-08-18 11:59     ` Tejun Heo
2005-08-18 12:12       ` Steven Scholz
2005-08-18 12:19         ` Tejun Heo
2005-08-18 12:24       ` Bartlomiej Zolnierkiewicz
2005-08-18 12:44         ` Tejun Heo
2005-08-18 13:03           ` Bartlomiej Zolnierkiewicz

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