Date: Thu, 22 Feb 2001 17:23:03 -0800 From: Richard Johnson <raj@cisco.com> To: Tony Finch <dot@dotat.at>, Kevin Oberman <oberman@es.net>, mobile@FreeBSD.ORG Subject: Re: Any ideas on keeping the disk spun down on laptop Message-ID: <14997.47991.879862.104215@kitab.cisco.com> In-Reply-To: <14997.39822.118192.470255@kitab.cisco.com> References: <200102112211.f1BMBCL23187@ptavv.es.net> <20010212211351.F35416@hand.dotat.at> <20010212234816.M35416@hand.dotat.at> <14997.39822.118192.470255@kitab.cisco.com>
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Richard Johnson writes:
> I wanted to mention, along these lines, that netbsd has a command
> which can program the disk controller to enter "idle" or "standby"
> mode after a number of seconds. The command is "atactl". I looked at
> how this is done. It's using a set of controller commands which
> apparently aren't supported under FreeBSD. The controller commands
> are:
Let me followup on my own message...
I put in the following kludge and it my disk drive now spins down
after 10 seconds just fine:
*** bk_ata-disk.c Tue Aug 22 01:41:29 2000
--- ata-disk.c Thu Feb 22 17:11:56 2001
***************
*** 151,156 ****
--- 151,162 ----
0, 0, 0, 0, ATA_C_F_ENAB_WCACHE, ATA_WAIT_INTR))
printf("ad%d: enabling write cache failed\n", adp->lun);
+ /* Try to turn on suspend mode after 30 seconds */
+ if (ata_command(adp->controller, adp->unit, 0xe2,
+ 0, 0, 0, 10, 0, ATA_WAIT_INTR))
+ printf("ad%d: suspend mode failed\n", adp->lun);
+
+
/* use DMA if drive & controller supports it */
ata_dmainit(adp->controller, adp->unit, ata_pmode(AD_PARAM),
ata_wmode(AD_PARAM), ata_umode(AD_PARAM));
It'd be nice to have this more easily configurable via an ioctl, of
course.
/raj
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