Re: sync & asyck i/o

From: Stephen C. Tweedie (
Date: Tue Feb 06 2001 - 13:18:08 EST


On Tue, Feb 06, 2001 at 05:54:41PM +0000, David Woodhouse wrote:
> said:
> > Linux will obey that if it possibly can: only in cases where the
> > hardware is actively lying about when the data has hit disk will the
> > guarantee break down.
> Do we attempt to ask SCSI disks nicely to flush their write caches in this
> situation? cf.

No, we simply omit to instruct them to enable write-back caching.
Linux assumes that the WCE (write cache enable) bit in a disk's
caching mode page is zero.

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This archive was generated by hypermail 2b29 : Wed Feb 07 2001 - 21:00:24 EST