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Message-ID: <47120D65.3080008@samwel.tk> Date: Sun, 14 Oct 2007 14:36:53 +0200 From: Bart Samwel <bart@...wel.tk> To: crash@...ysoft.com CC: Mark Lord <lkml@....ca>, linux-kernel@...r.kernel.org Subject: Re: hdparm standby timeout not working for WD raptors? Mark Weber wrote: > On 10/12/07, Mark Lord <lkml@....ca> wrote: >> That's interesting. >> >> So, either something is regularly accessing/polling the drive, >> or it just doesn't work with the standby timer. >> >> Are there any interesting kernel messages being generated >> during execution of those commands? > > No messages to /var/log/messages as a result of those > commands; I ran several times and did a sync too, just > in case. > > I very much doubt that something is regularly accessing > the drives because I have a script that runs every 1/2 hour > to check and log status. The drives stay "standby" for > hours (even days) at a time unless I specifically access > something on the RAID array. Then, they stay "active/idle" > until I manually set them to "standby". > > Anything else you'd like me to try? Some things to check: * Run "hdparm -I" on your drive. In the "Capabilities" section there is a line "Standby timer values", for some drives this mentions a device specific minimum. I know some drives that ignore any setting below 60 seconds. * I also know of quite a number of drives where hdparm -B settings override the -S settings, even if you set the -S settings after the hdparm -B settings. You could try combinations with various values of hdparm -B, especially 1 and 255. Cheers, Bart - 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/
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