Hi, My box panics when I use raidutil tool to turn off write-back for arrays and disks, as advised for database setup (because of no battery) and when getting status. Panic occurs immediately after issuing command 'raidutil -d 0 -w off d0b0t0d0', but sometimes it manages to complete and echo that write-back has been turned off. Several minutes after that it panics anyway, maybe on next disk, maybe on 'raidutil -d 0 -L all' to get information about status, maybe on reboot. Sometimes it panics after only one informational command 'raidutil -d 0 -L all' (immediate and several minutes later). Kernel config: include GENERIC ident CTRL1 options SC_HISTORY_SIZE=2000 options IPFIREWALL options IPFIREWALL_DEFAULT_TO_ACCEPT options IPFIREWALL_FORWARD options DUMMYNET options QUOTA options RACCT options RCTL device smbus device smb device ichsmb device ichwd options ASR_COMPAT raidutil is from port sysutils/asr-utils, ASR_COMPAT is added to kernel config to get it working. Several panic textdumps: http://pastebin.com/pnehc75B http://pastebin.com/NnpijeYJ http://pastebin.com/m8qJPPzD http://pastebin.com/UUUwcFMX http://pastebin.com/bP1BEbzG http://pastebin.com/1CWSEgqL No consistent backtrace among them - all different, so I am not including any in this message. vmcore.* dumps are preserved for a while, so they can be used if needed. I have to say that previously this box was running 7.4-release, and at least informational command 'raidutil -d 0 -L all' did not lead to panic. Any hint to help debugging this issue would be greatly appreciated. -- Best regards, Victor Popov