On Dec 16, 2011, at 12:47 AM, Jan Mikkelsen wrote: > On 16/12/2011, at 3:40 AM, Andrew Boyer wrote: >> On Dec 15, 2011, at 4:19 AM, Jan Mikkelsen wrote: >> >>> For the mfi controllers I have been testing recently (MegaRAID 9261-8i), >>> you need to install the sysutils/megacli port, and use that to clear the >>> "foreignness" of the disk you just added. Something like: >>> >>> MegaCli -CfgForeign -Clear -a0 >> >> I don't think that's what you want. You want to use -Import, not -Clear, to >> keep your data intact. > > OK. When I did a -Clear and recreated the drive as a single disk raid0 > volume, the data was still there, but I wanted it to go away.
The RAID identity is stored on a 512MB partition at the end of the disk. Clearing and recreating it doesn't actually affect your data, as you discovered. You can even plug one of your RAID0 disks into a non-RAID controller and your data will be there. mfiutil has a 'drive clear' feature to zero disks. Or you could just dd a few megs of zeroes to the beginning of the disk. > >> I recommend you always run with this configuration: >> >> # MegaCli -AdpSetProp AutoEnhancedImportEnbl -aALL >> # MegaCli -AdpSetProp MaintainPdFailHistoryEnbl -0 -aALL >> >> AutoEnhancedImportEnbl will bring the foreign disk back in on a reboot. LSI >> recommends turning off MaintainPdFailHistory when using single-disk RAID0 >> configurations. > > What does PD Fail History actually do? See: http://kb.lsi.com/KnowledgebaseArticle16570.aspx -Andrew -------------------------------------------------- Andrew Boyer abo...@averesystems.com _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
