From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?utf-8?Q?Peter_M=C3=BCnster?= Subject: avoid disk spinup at system resume Date: Mon, 16 Mar 2015 13:28:21 +0100 Message-ID: <871tkpunx6.fsf@free.fr> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from plane.gmane.org ([80.91.229.3]:42312 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750736AbbCPMaE (ORCPT ); Mon, 16 Mar 2015 08:30:04 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1YXU9i-0005r0-Vu for linux-scsi@vger.kernel.org; Mon, 16 Mar 2015 13:30:03 +0100 Received: from arennes-651-1-149-36.w2-2.abo.wanadoo.fr ([2.2.212.36]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 16 Mar 2015 13:30:02 +0100 Received: from pmlists by arennes-651-1-149-36.w2-2.abo.wanadoo.fr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 16 Mar 2015 13:30:02 +0100 Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Hi, My SATA disk (sdb) spins up at every system resume. How could I avoid that please? Some details: - sdb not mounted - echo 0 >/sys/block/sdb/device/scsi_disk/2:0:0:0/manage_start_stop - hdparm -C /dev/sdb : "drive state is: standby" - s2ram - after wake up: "drive state is: active/idle" - kernel message at wakeup: "sd 2:0:0:0: [sdb] Synchronizing SCSI cache" - when doing "echo scsi remove-single-device 2 0 0 0 >/proc/scsi/scsi" before s2ram, sdb keeps sleeping after resume I need the disk only about once per week. I use s2ram several times per day, and I prefer that sdb keeps sleeping. TIA for any hints, -- Peter