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Date:      Sun, 24 Jan 1999 00:11:58 +0100
From:      "José Mª Alcaide" <jose@we.lc.ehu.es>
To:        "D. Rock" <rock@wurzelausix.CS.Uni-SB.DE>
Cc:        julian@whistle.com, current@FreeBSD.ORG
Subject:   Re: dirty fs after apm power off
Message-ID:  <36AA573E.29040BCB@we.lc.ehu.es>
References:  <199901232302.AAA06978@vodix.aremorika>

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D. Rock wrote:
> 
> This is what I also thought. But how do I turn off write caching on IDE
> disks. I know how to do on SCSI bit (mode page 8 byte 2 bit 2 clear), but
> I have absolutely no clue how this can be achieved on IDE disks.
> 
> I normally turn off write caching on all drives I install. The drive shouldn't
> shuffle the carefully sorted file system blocks.
> 

Some BIOSes have an APM setting that forces a delay before turning
the power supply off.

-- JMA
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José Mª Alcaide                         | mailto:jose@we.lc.ehu.es
Universidad del País Vasco              | http://www.we.lc.ehu.es/~jose
Dpto. de Electricidad y Electrónica     |
Facultad de Ciencias - Campus de Lejona | Tel.:  +34-946012479
48940 Lejona (Vizcaya) - SPAIN          | Fax:   +34-944858139
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               "Go ahead... make my day." - H. Callahan

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