Jan Wagner wrote: > First the minor(?) issue, the ICH10(R) datasheet > http://www.intel.com/Assets/PDF/datasheet/319973.pdf > says on page 527, PMS flag: port multipliers are not supported. The > PMFSE flag page 542 says neither port multipliers nor FIS pmp are > supported. ICH10R works fine with PMP in command-switching mode. FIS based switching is not supported and I agree the doc is somewhat confusing. > On our ASUS P5Q Pro motherboard with ICH10R, ahci detects 'pmp': > > ahci 0000:00:1f.2: AHCI 0001.0200 32 slots 6 ports 3 Gbps 0x3f impl SATA > mode > ahci 0000:00:1f.2: flags: 64bit ncq sntf stag pm led clo pmp pio slum > part ems > > In light of the datasheet, perhaps in ahci.c the CAP register (read-only > from host) 'pmp' flag should be actively reset to 0 for ich10r? > > Ayway the bigger issue with ICH10R is that the SATA disks detach > randomly during "heavy" i/o load. This happens withing just a few > seconds. If I disable NCQ (echo 1 > nr_requests), it takes "longer" to > happen, some ten seconds. I already ruled out the SATA cables, disks > themselves, and disk cages as a cause. > > The detaching happens at least in these (Ubuntu-patched) kernels: > > $ uname -rm > 2.6.27-2-generic i686 > > $ uname -rm > 2.6.24-19-generic i686 > > It happens with disks behind a port multiplier. The ich10r 'pmp' > "support" seems to work as CB- but not FIS-based, so it is slow, or just > broken. > > But the detaches also happen with disks connected to the native ich10r > ports. > > All in all ich10r seems to work very unreliably. So I was wondering if > support for ICH10R in ahci.c is not complete yet? > > > Or can someone here shout "ich10r ahci works for me"? ICH10 works fine w/ or w/o PMP. Can you please post full kernel log including boot messages and error messages? Thanks. -- tejun -- 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
