On Wed, 2008-04-02 at 16:32 -0700, Sanjay Gandotra wrote: > Hi, > > Ok, the issue I have is the following: > > I have connected a SATA Port Multiplier to AD-483000. And I have two sata drives connected to the Sata port multiplier (one at port 0 and second at port 1) > My Linux Kernel is 2.6.24.3. I am using the drivers in the kernel.. aic94xx and libsas > > The drive at port 0 of the sata port multiplier is detected nicely. The problem is that the second drive on the port multiplier is not detected. > After investigations.. I figured out that no one is trying to do sata port multiplier initialisation and detection. After reading the sata spec etc., I tried to modify libsas so that before detecting any sata device, it would send out FIS (soft reset ) to sata port 15 with SRST bit set to 1 followed by another FIS to sata port 15 with SRST bit set to 0. > > The first FIS goes out. I can see it on a SATA analyzer. The second FIS never goes out... > Adaptec's driver.. is giving errors for the first FIS. I'm afraid the basic source of the problem is that port multiplier support in libsas is stubbed out. No-one developing the driver actually has a port multiplier (and we assumed that everyone would use expanders anyway). The place to begin is in libsas/sas_ata.c:sas_discover_stat_pm() which basically returns -ENODEV at the moment. James -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
