After upgrading to snv_150, I''m getting continual writes at about 30 wps. The M40 is much more sluggish and has been doing this since last Thursday after upgrade. The iosnoop constantly shows large zpool-rpool writes on an idle system: UID PID D BLOCK SIZE COMM PATHNAME 0 5 W 178210772 2560 zpool-rpool <none> 0 5 W 176871923 512 zpool-rpool <none> 0 5 W 30083450 512 zpool-rpool <none> 0 5 W 178324968 1024 zpool-rpool <none> 0 5 W 29663747 1024 zpool-rpool <none> 0 5 W 30184485 5632 zpool-rpool <none> 0 5 W 31792446 7168 zpool-rpool <none> 0 5 W 176871922 512 zpool-rpool <none> 0 5 W 178208879 5632 zpool-rpool <none> 0 5 W 178324962 3072 zpool-rpool <none> 0 5 W 178325407 7168 zpool-rpool <none> ... ([semery at sulu:~])-> zpool status pool: rbackup state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM rbackup ONLINE 0 0 0 c8t0d0s7 ONLINE 0 0 0 errors: No known data errors pool: rpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 c9t0d0s0 ONLINE 0 0 0 errors: No known data errors Please let me know what other information you would like or if this has already been observed with 150. Thanks, Shawn. -- -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20101017/cf109bd6/attachment-0001.html>