lkml.org 
[lkml]   [2001]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better
On Mon, 24 Sep 2001, Alan Cox wrote:

> > > better. Decent write caching on IDE devices (like the 2meg buffer on the IBM)
> > > can completely hide this issue.
> >
> > Decent write caching on IDE devices can eat your whole file system.
>
> YM bad write caching 8)

Well, drives do reorder their cache flushes, otherwise, they don't need
the cache.

> > Turn it off (I have no idea of internals, but I presume it'll still be a
> > write-through cache, so reading back will still be served from the
> > buffer). Do hdparm -W0 /dev/hd[a-h].
>
> You can't turn it off and on many drives you can't flush the cache either
> the operation is not implemented.

Those drives should be blacklisted and rejected as soon as someone tries
to mount those pieces rw. Either the drive can make guarantees when a
write to permanent storage has COMPLETED (either by switching off the
cache or by a flush operation) or it belongs ripped out of the boxes and
stuffed down the throat of the idiot who built it.

--
Matthias Andree

"Those who give up essential liberties for temporary safety deserve
neither liberty nor safety." - Benjamin Franklin
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:03    [W:0.157 / U:0.256 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site