Re: SATA port multiplier(Sil 3132) and JMicron 361-363

[Tejun Heo]

mikp wrote:
 The JMB361 controller is more quirky. I had to reboot and replug 3 or 4
 times before the PMP box started working normal. Here is syslog and dmesg 
 of boot 
 and reboot to finally get JMB361 working:
 The log messages are truncated.  Can you please post a clean kernel log
 including booting, detection of ata5 and detection failure?  Also,
 please give a shot at different shorter cable.

 I tested this morning with different cables (long and short) and the JMB361 
 worked successfully with the PMP every time. So it appears the previous 
 problem was related to the cable. Although the same cable did work with the 
 SI 3132.

I've seen that sometimes.  I don't know whether PMP devices are picky
about cable or e-SATA cables are crappy tho.

Thanks.

-- 
tejun
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SATA port multiplier(Sil 3132) and JMicron 361-363

[mikp]

My SII 3132 port multiplier works with the JMB363 controller on my motherboard 
using kernel-2.6.24-rc3 but not with the JMB361 esata controller which i have 
on a second motherboard.

I get messages:
   ata5.15: failed to read PMP GSCR[1] (Emask=0x4)
   ahci :00:12.0: controller can't do PMP, turning off CAP_PMP

The motherboard maker (ECS) and JMicron data claim that JMB361 has a port 
multiplier.

Is there any chance this controller can be made to work in linux? I am willing 
to test patches.
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