search for: ata_command

...t we just upgraded the RAM on the server from 1 GB to 2 GB (DDR 400), perhaps a cable got slightly loose. I'm pretty certain the hard drives are good since the server ran fine prior to the memory upgrade. What do the errors below mean? Should I be worried? Apr 11 17:17:12 freebsd kernel: ad4: ata_command: addr=c000, command=c8, lba=432167635, count=4, feature=0 Apr 11 17:17:12 freebsd kernel: ad4: ata_command: addr=c000, command=ca, lba=13040031, count=32, feature=0 Apr 11 17:17:12 freebsd kernel: ad4: ata_command: addr=c000, command=ca, lba=17221247, count=32, feature=0 Apr 11 17:17:12 freebsd ker...

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Here's a patch against 4.8-RELEASE kernel that allows disk writes on softupdates-enabled filesystems to be delayed for (theoretically) arbitrarily long periods of time. The motivation for such updating policy is surprisingly not purely suicidal - it can allow disks on laptops to spin down immediately after I/O operations and stay idle for longer periods of time, thus saving considerable amount