Yinghai Lu wrote:
On Tue, Nov 6, 2007 at 8:09 PM, Yinghai Lu <yhlu.kernel@xxxxxxxxx> wrote:
On Nov 7, 2006 1:55 AM, Peer Chen <pchen@xxxxxxxxxx> wrote:
Modified and resent out the patch as attachment.
Description about the patch:
Add SGPIO support in sata_nv.c.
SGPIO (Serial General Purpose Input Output) is a sideband serial 4-wire
interface that a storage controller uses to communicate with a storage
enclosure management controller, primarily to control activity and
status LEDs that are located within drive bays or on a storage
backplane. SGPIO is defined by [SFF8485].
In this patch,we drive the LEDs to blink when read/write operation
happen on SATA drives connect the corresponding ports on MCP55 board.
I missed the start of this thread.... Is it possible to blink the
lights from user space? This is very useful when trying to locate a
dead or dying drive. for example, /dev/sdc dies, but I have no way of
knowing which one it is without unplugging all the cables one at a
time. A userspace utility that would allow me to blink a drive activity
light would be very useful.
--Yan
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