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The Wednesday 2007-06-20 at 15:48 +0200, Joachim Schrod wrote:
> > Now, external drives... that's interesting. I would report the problem to
> > bugzilla, the kernel should survive a disk sleep.
>
> I'll think about that -- have to judge the entry writing effort with the
> anticipated results of a 10.0 kernel error report.
Ah, 10.0... you are right, it should be reported against a 10.2 system at
least.
> But anyhow, you helped me further a lot:
And you me, because...
> > nimrodel:~ # hdparm -C /dev/sdb
> >
> > /dev/sdb:
> > drive state is: unknown
>
> This did not work here either, but I got reminded that there is sdparm to
> check and change the SCSI disk parameters. And voila, here we are:
...I had completely forgotten 'sdparm' :-)
> sdparm --command=ready /dev/sdc # check ready state
> sdparm --command=start /dev/sdc # start a sleeping disk
> sdparm --command=stop /dev/sdc # put a disk in standby
> sdparm -al -f /dev/sdc # list all known mode flags
> sdparm -6 -p po --clear=STANDBY /dev/sdc # turn off standby feature
> sdparm -6 -p po --defaults /dev/sdc # establish it again
I have looked at the man page, but didn't find out more. Perhaps there is
another one to learn the sleep timeout. Anyway, the sequence doesn't seem
to work on mine:
nimrodel:~ # sdparm --command=stop /dev/sda
/dev/sda: ST360020 A 0000
nimrodel:~ # sdparm --command=ready /dev/sda
/dev/sda: ST360020 A 0000
Ready
It is not stopped, even with the device umounted.
> Now I just need to observe if the disk gets too hot after I turned off the
> standby feature. Sadly, smartctl doesn't work for that disk, so I have no
> reliable method of checking its temperature.
No, smartctl doesn't work because the chipset of the usb boxes do not
support the necessary commands; at least that's what I read somewhere.
> But that's a minor inconvenience compared to the state before.
> Muchas gracias!
De nada :-)
- --
Cheers,
Carlos E. R.
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