ad* read errors

[Lowell Gilbert]

Warren <shinjii at virusinfo.rdksupportinc.com> writes:

> since i updated the ports/src/kernel 2 days ago i have had the followings 
> error splague me .. are these related or am i looking at hdd failure ?
> ========================
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=1519103
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=5266559
> ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=5266559
> ad0: FAILURE - READ_DMA timed out
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=15383527
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=1484415
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=25769279
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=5126031
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=25089095
> ad0: TIMEOUT - READ_DMA retrying (2 retries left) LBA=26332807
> ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=26332807
> ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=115046303
> ad1: TIMEOUT - READ_DMA retrying (2 retries left) LBA=189786975

It could well be disk failure, but check a couple of simpler things
first.  Number 1, make sure that you have turned on automatic sector
remapping on that disk.  How you do that can vary by disk
manufacturer, but see the FAQ entry on bad block remapping.  Number 2
is to get a new disk cable; cable problems are at least as common as
disk failures in my experience, and it's *really* annoying to replace
a disk and find that the problem wasn't the disk in the first place.

-- 
Lowell Gilbert, embedded/networking software engineer, Boston area
		http://be-well.ilk.org/~lowell/