Hi all, I have several computers of different configurations (other motherboards, controllers). Each have 14-20 hdd devices (ATA & SATA). All hdd is WDC WDxxxxJD or WDC WDxxxxJB. Computers periodically crashed with "disk detached" (random disk id) error: subdisk10: detached ad10: detached g_vfs_done():ad10s1h[READ(offset=289109770240, length=65536)]error = 6 g_vfs_done():ad10s1h[READ(offset=289297481728, length=131072)]error = 6 g_vfs_done():ad10s1h[READ(offset=296795766784, length=131072)]error = 6 -- skipped -- panic: vinvalbuf: dirty bufs Uptime: 13h32m44s Cannot dump. No dump device defined. Automatic reboot in 15 seconds - press a key on the console to abort Rebooting... After reboot, it's quite likely (20-30 percents) that fsck (running in background mode) lock in ufs state and can't be killed even by SIGKILL. After it all others processes working with that device lock in ufs state too. It's appear on all FreeBSD 6 versions, from 6.0 RELEASE to 6.1-STABLE. -- Best regards, bymer mailto:bymer@infostore.org