Re: Do we need to implement sr START/STOP management

[JiSheng Zhang <jszhang3@xxxxxxxxx>]

Hello,

2011/11/2 Robert Hancock <hancockrwd@xxxxxxxxx>:
> On 11/01/2011 12:35 AM, JiSheng Zhang wrote:
>>
> I believe the main reason disks are stopped during shutdown is that for many
> hard drives that use head unloading, it's much better for the lifespan of
> the drive to do a powered head unload on software command before powering
> off than an emergency unload caused by a loss of power. I don't believe that
> optical drives have such an issue.
>
I have talked with one cdrom firmware engineer, cdrom also need to put
the head at
"park" position. So we also need to let cdrom spin down when poweroff,
suspend etc for lifespan?

Assume /sbin/shutdown immediately after reading from cdrom and cdrom
has no time to spin down

Thanks,
Jisheng
--
To unsubscribe from this list: send the line "unsubscribe linux-ide" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html