[ltp] HDAPS and drives that can't park & can you park 2 drives (main+ultraybay)?

[Adam Sloboda]

At Wed, 26 Dec 2007 16:15:56 -0800,
Marc MERLIN wrote:
> 
> On Wed, Dec 26, 2007 at 10:47:08AM +0100, Adam Sloboda wrote:
> > > Speaking of hdaps, I still get:
> > > Dec 25 20:53:35 gandalf kernel: scsi_protect_queue(): head NOT parked!..
> > > Dec 25 20:53:35 gandalf kernel: scsi_unprotect_queue(): No pending I/O,
> > > re-enabling power management..
> > > despite:
> > > gandalf:/usr/src/linux# echo unload > /sys/block/sda/queue/protect_method
> > 
> > Do you have "unload" method listed in /sys/block/sda/queue/protect_method?
> > I have no other idea...
> 
> Yes:
> gandalf:~# cat /sys/block/sda/queue/protect_method
> auto unload [standby]
> 
> > > But at least, the sensors work now, it's just a matter of figure out
> > > why my HD won't park (hints welcome) (I used the 'Latest sata/ide disk
> > > protection patch for 2.6.22.9 and 2.6.23-rc9' disk-protect-2.6.22.9-2.patch 
> > > from http://www.thinkwiki.org/wiki/HDAPS#Disk_head_parking)
> > 
> > The newer patch shouldn't hurt, I guess.
> 
> Ok, so I've fixed my other problems, but not this one yet.
> 
> HDAPS sensors work, as per hdaps-gl by using http://www.thinkwiki.org/wiki/Tp_smapi
> and make load HDAPS=1
> 
> My drive info is pasted below, and as 
> http://www.thinkwiki.org/wiki/Problem_with_APS_harddisk_parking
> says, when I shake, move my laptop, I get:
> kernel: scsi_protect_queue(): head park not requested, used standby!..
> with 
> gandalf:~# cat /sys/block/sda/queue/protect_method
> auto unload [standby]
> 
> If I set unload, I get:
> kernel: scsi_protect_queue(): head NOT parked!..
> kernel: scsi_unprotect_queue(): No pending I/O, re-enabling power management..

And can you hear that specific parking sound?

> 
> and back to auto:
> gandalf:/sys/block/sda/queue# echo auto > /sys/block/sda/queue/protect_method
> gandalf:/sys/block/sda/queue# echo 1 > /sys/block/sda/queue/protect
> kernel: scsi_protect_queue(): head park not requested, used standby!..
> kernel: scsi_unprotect_queue(): No pending I/O, re-enabling power management..
> 
> If I read this right, it means my sda drive does not support head parking,
> correct? I couldn't find details on standby, what does standby do exactly?
> (obviously, I'm guessing it tries not to use the drive, ubt I'm not sure how,
> and I already know that putting the drive to sleep is bad for the
> mechanics due to how often the daemon fires up)

Standby spins down -- it's slow and shortens lifetime (I don't
remember the expected lifetime numbers for notebook disks).

> 
> As a counter example, my sdb (original) drive:
> gandalf:/sys/block/sda/queue# echo 1 > /sys/block/sdb/queue/protect
> kernel: scsi_protect_queue(): head parked..
> kernel: scsi_unprotect_queue(): No pending I/O, re-enabling power management..
> 
> If I want to park my 2nd drive, do I need to run two /usr/sbin/hdapsd, one
> for sda, and one for sdb, or can it be told to do both drives at once?

Let me guess, this is the drive which came in with notebook?  Head
unloading won't work on any random disk.

Unloading for more drives probably needs simple patch or feature
request.

> 
> /dev/sda:
>  Model=Hitachi HTS541616J9SA00                 , FwRev=SB4OC70P, SerialNo=      SB2481SJK51V6E
>  Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
>  BuffType=DualPortCache, BuffSize=7516kB, MaxMultSect=16, MultSect=?16?
>  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
>  IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4 
>  DMA modes:  mdma0 mdma1 mdma2 
>  UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 
>  AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
>  Drive conforms to: ATA/ATAPI-7 T13 1532D revision 1:  ATA/ATAPI-2,3,4,5,6,7
> 
> gandalf:~# hdparm -i /dev/sdb
> /dev/sdb:
> 
>  Model=ST910021AS                              , FwRev=4.06    ,
> SerialNo=            3MH10Y43
>  Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
>  RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
>  BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=?16?
>  CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=195371568
>  IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
>  PIO modes:  pio0 pio1 pio2 pio3 pio4 
>  DMA modes:  mdma0 mdma1 mdma2 
>  UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 
>  AdvancedPM=yes: unknown setting WriteCache=enabled
>  Drive conforms to: Unspecified:  ATA/ATAPI-1,2,3,4,5,6,7
> 
> -- 
> "A mouse is a device used to point at the xterm you want to type in" - A.S.R.
> Microsoft is to operating systems & security ....
>                                       .... what McDonalds is to gourmet cooking
> Home page: http://marc.merlins.org/
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Adam