Re: Head parking (was: IBM HDAPS things are looking up)
From: Lenz Grimmer
Date: Thu Jul 07 2005 - 03:43:23 EST
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Hi,
Jens Axboe wrote:
> ATA7 defines a park maneuvre, I don't know how well supported it is
> yet though. You can test with this little app, if it says 'head
> parked' it works. If not, it has just idled the drive.
Great! Thanks for digging this up - it works on my T42, using a Fujitsu
MHT2080AH drive:
lenz@metis:~/work/ibm_hdaps> sudo ./headpark /dev/hda
head parked
Judging from the sound the drive makes, this is the same operation that
the windows tool performs.
However, the head does not remain parked for a very long time,
especially if there is a lot of disk activity going on (I tested it by
running a "find /" in parallel). The head parks, but leaves the park
position immediately afterwards again. I guess now we need to find a way
to "nail" the head into the parking position for some time - otherwise
it may already be on its way back to the platter before the laptop hits
the ground...
Thanks again - this is another helpful bit in getting all the pieces
together.
Bye,
LenZ
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Lenz Grimmer <lenz@xxxxxxxxxxx> -o)
[ICQ: 160767607 | Jabber: LenZGr@xxxxxxxxxx] /\\
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