The last half year I've been installing FreeBSD on several machines. I installed it on my main desktop system a few weeks ago which normally runs Linux, but I get this panic under heavy disk I/O.
It even happened during the initial sysinstall, allthough I also have completed several buildworlds without problems. I can trigger it easily by accessing /usr (UFS) and a linux ext partition simultaneously, eg by copying large files to the /usr partition. Just bought a serial cable to enable the serial console of the various FreeBSD installations, which is of good use for this problem, because a crash dump is not written. Full boot output in the attachment Sun Jan 9 10:11:17 CET 2011 unknown: TIMEOUT - WRITE_DMA48 retrying (1 retry left) LBA=274799820^M ata2: timeout waiting to issue command^M ata2: error issuing WRITE_DMA48 command^M g_vfs_done():ad4s2f[WRITE(offset=28915105792, length=131072)]error = 6^M /usr: got error 6 while accessing filesystem^M panic: softdep_deallocate_dependencies: unrecovered I/O error^M cpuid = 0^M KDB: stack backtrace:^M #0 0xc08e0f77 at kdb_backtrace+0x47^M #1 0xc08b2037 at panic+0x117^M #2 0xc0ae2ecd at softdep_deallocate_dependencies+0x3d^M #3 0xc0925590 at brelse+0x90^M #4 0xc092829a at bufdone_finish+0x3fa^M #5 0xc092830d at bufdone+0x4d^M #6 0xc092bdf9 at cluster_callback+0x89^M #7 0xc09282f7 at bufdone+0x37^M #8 0xc0850ad5 at g_vfs_done+0x85^M #9 0xc09224d9 at biodone+0xb9^M #10 0xc084da69 at g_io_schedule_up+0x79^M #11 0xc084e0a8 at g_up_procbody+0x68^M #12 0xc0886fc1 at fork_exit+0x91^M #13 0xc0bcc144 at fork_trampoline+0x8^M Uptime: 2h56m27s^M Physical memory: 1515 MB^M Dumping 177 MB:ata2: timeout waiting to issue command^M ata2: error issuing WRITE_DMA command^M ^M ** DUMP FAILED (ERROR 5) **^M Automatic reboot in 15 seconds - press a key on the console to abort^M Rebooting...^M
crash_script
Description: Binary data
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