Hi,
We have reported earlier a strange bug at bugzilla.kernel.org (#4106 <http://bugzilla.kernel.org/show_bug.cgi?id=4106>): in our setup of a 20318 (the SATA150 TX4, not the fastrack one) we are systematically getting ata1: command timeout after copying between 200 and 600GB of data through the controller. Our setup is with 4 maxtor 6Y200M0, 2 of them in raid 0, and the other 2 in a LV group over a raid 0 md array. When copying from one array to the other one repeatedly, the machines freezes once out out of every 2 copy. We changed the drive order, but we still got the msg ata1 command timeout. We swapped the order of the cables, and still got ata1 command timeout. We got a few kernel panics with spin locks, but since finding this forum we added the line
writel(mask, mmio_base + PDC_INT_SEQMASK);
to pdc_interrupt, and that one was gone.
We have kernel 2.6.10-753 (fc3) with all relevant patches to the sata stuff, the last of which is the one Bartlomiej Zolnierkiewicz posted on 06/02/2005. http://marc.theaimsgroup.com/?l=linux-ide&m=110769875419863&w=2 <http://marc.theaimsgroup.com/?l=linux-ide&m=110769875419863&w=2>
After commenting out the line /* reduce TBG clock to 133 Mhz. */ /*tmp = readl(mmio + PDC_TBG_MODE); */ tmp &= ~0x30000; /* clear bit 17, 16*/ tmp |= 0x10000; /* set bit 17:16 = 0:1 */ /*writel(tmp, mmio + PDC_TBG_MODE); */
in pdc_host_init (total shot in the dark) the setup seems more stable, we have now gone through 3 cycles of stress test (600GB of copying) and have not seen the crash.
Earlier we tried the same stress test with ATA_DEBUG and ATA_VERBOSE_DEBUG defined, the error did not occur maybe because of it was slowed down with all the output)?
Later we tried commenting out the line that sets bmr burst (PDC_FLASH_CTL) and slew rate (PDC_SLEW_CTL) in pdc_host_init, and that slowed the setup to half it's orignal speed, but in that case the problem did not show up.
We outputted the command timeout and it's 0x35 (ATA_CMD_WRITE_EXT) protocol is 4 (ATA_PROT_DMA).
Any ideas? TIA, Francois Payette - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
