Re: power off disk drives while running

2007-08-20 Thread Phillip Susi
Jan Engelhardt wrote: An IDE reset bringing the disk up again -- that does not sound like it is powered down. Power down for me means: as if the plug was pulled. Reset means "power on, initialize power on state". While shutdown in this way, the drive has shut down and is not drawing any

Re: power off disk drives while running

2007-08-20 Thread Phillip Susi
Jan Engelhardt wrote: An IDE reset bringing the disk up again -- that does not sound like it is powered down. Power down for me means: as if the plug was pulled. Reset means power on, initialize power on state. While shutdown in this way, the drive has shut down and is not drawing any power.

Re: power off disk drives while running

2007-08-18 Thread Brennan Ashton
On 8/18/07, Jan Engelhardt <[EMAIL PROTECTED]> wrote: > > On Aug 18 2007 14:22, Robert Hancock wrote: > >> I see this a a very important feature in the embedded system relm, I > >> have worked on two projects that required extreme power management, > >> and massive data storage. The ability to

Re: power off disk drives while running

2007-08-18 Thread Jan Engelhardt
On Aug 18 2007 14:22, Robert Hancock wrote: >> I see this a a very important feature in the embedded system relm, I >> have worked on two projects that required extreme power management, >> and massive data storage. The ability to fully turn off a drive while >> the system is running is key. It

Re: power off disk drives while running

2007-08-18 Thread Robert Hancock
Brennan Ashton wrote: On 8/18/07, Jan Engelhardt <[EMAIL PROTECTED]> wrote: On Aug 18 2007 12:08, Marty Leisner wrote: In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered

Re: power off disk drives while running

2007-08-18 Thread Brennan Ashton
On 8/18/07, Jan Engelhardt <[EMAIL PROTECTED]> wrote: > > On Aug 18 2007 12:08, Marty Leisner wrote: > > > >In embedded system design, it may be useful to poweroff the disks (as opposed > >to merely spinning them down). We want to leave the system running while > >the disk is powered down, and

Re: power off disk drives while running

2007-08-18 Thread Jan Engelhardt
On Aug 18 2007 12:08, Marty Leisner wrote: > >In embedded system design, it may be useful to poweroff the disks (as opposed >to merely spinning them down). We want to leave the system running while >the disk is powered down, and let the disk powerup when it needs to be >spun up. That means you

power off disk drives while running

2007-08-18 Thread Marty Leisner
In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered down, and let the disk powerup when it needs to be spun up. While the "power off mechanism" would be platform dependent, is

power off disk drives while running

2007-08-18 Thread Marty Leisner
In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered down, and let the disk powerup when it needs to be spun up. While the power off mechanism would be platform dependent, is

Re: power off disk drives while running

2007-08-18 Thread Jan Engelhardt
On Aug 18 2007 12:08, Marty Leisner wrote: In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered down, and let the disk powerup when it needs to be spun up. That means you also

Re: power off disk drives while running

2007-08-18 Thread Brennan Ashton
On 8/18/07, Jan Engelhardt [EMAIL PROTECTED] wrote: On Aug 18 2007 12:08, Marty Leisner wrote: In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered down, and let the disk

Re: power off disk drives while running

2007-08-18 Thread Robert Hancock
Brennan Ashton wrote: On 8/18/07, Jan Engelhardt [EMAIL PROTECTED] wrote: On Aug 18 2007 12:08, Marty Leisner wrote: In embedded system design, it may be useful to poweroff the disks (as opposed to merely spinning them down). We want to leave the system running while the disk is powered down,

Re: power off disk drives while running

2007-08-18 Thread Jan Engelhardt
On Aug 18 2007 14:22, Robert Hancock wrote: I see this a a very important feature in the embedded system relm, I have worked on two projects that required extreme power management, and massive data storage. The ability to fully turn off a drive while the system is running is key. It seems

Re: power off disk drives while running

2007-08-18 Thread Brennan Ashton
On 8/18/07, Jan Engelhardt [EMAIL PROTECTED] wrote: On Aug 18 2007 14:22, Robert Hancock wrote: I see this a a very important feature in the embedded system relm, I have worked on two projects that required extreme power management, and massive data storage. The ability to fully turn off