To answer the original question, no karmic doesn't have trim in effect.
However I grew a pair and tried wiper.sh (from hdparm 9.27) - it definitely works for intel drives too.
this
Code:
########################################################################
X25-M UNTRIMMED iozone
########################################################################
random random
KB reclen write rewrite read reread read write
262144 4 55854 61601 77975 77408 18740 37199
262144 8 79397 74942 107490 107615 34600 39998
262144 16 92717 81941 147162 147530 60921 45298
262144 32 98133 86319 175378 175948 98278 49321
262144 64 102575 87223 200613 201029 141870 70205
262144 128 96168 100709 224931 223912 181481 79198
262144 256 95011 103151 233538 234261 212879 73557
262144 512 110951 93840 244588 242498 233184 95013
262144 1024 112000 94834 253001 248172 245917 76849
262144 2048 112031 95471 252609 250570 209723 69661
262144 4096 98865 107274 255614 255558 213758 75851
262144 8192 97032 93397 258498 258156 238280 111814
turned into this
Code:
########################################################################
X25-M TRIMMED iozone
########################################################################
random random
KB reclen write rewrite read reread read write
262144 4 55436 65711 79852 80149 19067 53292
262144 8 77232 84058 109771 110180 34861 78440
262144 16 88799 94750 149140 147288 61525 94093
262144 32 97577 101654 174621 171067 98781 100264
262144 64 101396 106724 197531 202331 143772 106063
262144 128 107555 106179 220295 218789 180567 109024
262144 256 109005 108426 231249 226626 211819 110158
262144 512 107378 110893 233207 235219 233527 109245
262144 1024 110281 111575 241247 240927 244339 111624
262144 2048 111814 112242 242394 243583 208330 110694
262144 4096 110209 112247 248230 248664 213787 112301
262144 8192 111614 112405 250563 250567 238135 112355
You gotta love intel's capped write speed...
The process is as fast as the intel tool under windows (a couple of seconds) and I guess it could be automated with cron if one edits out the verification questions.
It doesn't work on ntfs however, it only trimmed my ext4 partitions.
It really isn't that bad considering that only win7 users get auto trim.
Under vista and xp you need to use tools exactly like this.
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