[Bug 59695] Re: High frequency of load/unload cycles on some hard disks may shorten lifetime

Ralph Corderoy ralph at inputplus.co.uk
Sun Jan 18 12:10:10 UTC 2009


I've acpi-support 0.109-0hardy2.  There's one remaining issue that I'll
point out in case others come searching.  One of my drives has a -B of
64 by default.  This is from `hdparm -I' having gone from power-up to
single-user mode.

In the past, I'd altered /etc/hdparm.conf to have `spindown_time = 60',
IOW `hdparm -S', for the drive and that gets applied on a normal boot.
It was working;  the drive would spindown after five minutes of
idleness.

Now, the drive's -B is being set, for the first time, to -B 254 on
booting.  As this is over 127, my drive never spins down from idleness.
Nor will it `spin down now, dammit' with `hdparm -y'.  (I'm working
around it with -B 127 after booting has finished.)

I don't know what the solution is, having not read through all the
comments to see the underlying problem that's trying to be solved, but
perhaps the drive's existing -B setting needs examining as part of
determining the new value, i.e. don't mess with the top-bit.

-- 
High frequency of load/unload cycles on some hard disks may shorten lifetime
https://bugs.launchpad.net/bugs/59695
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