linux-kernel - Re: power off disk drives while running

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <46C9B25B.9040208@cfl.rr.com>
Date:	Mon, 20 Aug 2007 11:25:15 -0400
From:	Phillip Susi <psusi@....rr.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
CC:	Robert Hancock <hancockr@...w.ca>,
	Brennan Ashton <comphappy@...il.com>,
	Marty Leisner <leisner@...hester.rr.com>,
	linux-kernel@...r.kernel.org
Subject: Re: power off disk drives while running

Jan Engelhardt wrote:
> An IDE reset bringing the disk up again -- that does not sound like
> it is powered down. Power down for me means: as if the plug was pulled.

Reset means "power on, initialize power on state".  While shutdown in 
this way, the drive has shut down and is not drawing any power.  The 
reset is required to enable power flow into the drive again so it comes 
online.  Essentially you have a transistor disconnecting the power 
inside the drive, and the reset pulse flips that transistor.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/