On 25/02/2011 3:21 AM, Mark Lord wrote:
On 11-02-24 05:06 AM, Tejun Heo wrote:
Near the rear:
JMB352 / 0834 LGBA1 A / 370JF3011 - This looks to be hooked up via
some capacitors to the DATA data lines on both sockets. If I haven't
mentioned before, this is a 2 x SATA drive bay cradle.
This is the SATA part.
A third tiny chip near the JMB352 is:
GL850A / MN2FA01G11 / 911SK03111 - Not 100% sure of the function of
this chip by following the tracks, but it looks like it might be
some kind of a clock source. That is a wild guess though!
This is USB thingie.
So, the offending part is JMB352. Justin, when JMB352 is doing e-SATA
interface, it's failing IDENTIFY. sata_sil fails to recognize it and
ahci (right? Steven) succeeds only after IDENTIFY failures and
retries. Any ideas what's going on? When doing e-SATA, is the chip
active or passive? ie. Does it just pass through the signals or do
some meddling inbetween?
Since this is a dual-SATA device, does it have TWO eSATA ports at the back,
or just one? If the latter, then I'd expect to find a port-multiplier in the chain.
Hi Mark,
There is only one eSATA port on the back of the cradle. From looking at
the specs of the JMB352[1], it seems that it has the capability to have
3 SATA channels. Two are used for the cradle bays, the third for the
uplink to the PC.
The PDF states:
"The SATA controller could be configured as host or device. The
3-port SATA II 3.0G controllers further supports the eSATA to dual SATA
communication."
[1] - http://www.jmicron.com/PDF/JMB352/JMB352.pdf
--
Steven Haigh
Email: netwiz@xxxxxxxxx
Web: http://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897
Fax: (03) 8338 0299
--
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
