are you trying to trim a really large section at once? i think that's what i see:
> [ - root] 3> date; ./trim /dev/rwd1d 4 2; date at least in my experience, the problem is that most devices take a while to handle a TRIM request, longer than the 30s timeout typically used. this is why blkdiscard(8) defaults to 32MiB chunks. maybe port that tool back, it's also supposed to match the linux command of the same name. it's not in netbsd-9, but last i tried, the interfaces the -current tool uses are available in -9 kernels. .mrg.
