Date: Fri, 16 Dec 2011 10:00:40 -0500 From: Andrew Boyer <aboyer@averesystems.com> To: Jan Mikkelsen <janm-freebsd-hackers@transactionware.com> Cc: freebsd-hackers@freebsd.org, Hugo Silva <hugo@barafranca.com> Subject: Re: mfi (Dell H700) + hot swapping doesn't appear to work with RC1 Message-ID: <937308E9-F456-4DB6-9C3C-215DE07E92B4@averesystems.com> In-Reply-To: <CA8A5F51-866E-4F85-985A-1A52B9601BCF@transactionware.com> References: <4EE8A005.5030607@barafranca.com> <9317551F-CBE0-4368-B798-498E58E240B2@sarenet.es> <2EA3FFF4-E6A2-4371-8891-26E99C551C67@transactionware.com> <4EEA1215.8060507@barafranca.com> <4EEA1A64.1040104@barafranca.com> <3A13B3B1-4CDE-4D5A-A6F3-E7DC5BB0E4E3@averesystems.com> <CA8A5F51-866E-4F85-985A-1A52B9601BCF@transactionware.com>
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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: >>=20 >>> 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: >>>=20 >>> MegaCli -CfgForeign -Clear -a0 >>=20 >> I don't think that's what you want. You want to use -Import, not = -Clear, to keep your data intact. >=20 > 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. >=20 >> I recommend you always run with this configuration: >>=20 >> # MegaCli -AdpSetProp AutoEnhancedImportEnbl -aALL >> # MegaCli -AdpSetProp MaintainPdFailHistoryEnbl -0 -aALL >>=20 >> AutoEnhancedImportEnbl will bring the foreign disk back in on a = reboot. LSI recommends turning off MaintainPdFailHistory when using = single-disk RAID0 configurations. >=20 > What does PD Fail History actually do? See: http://kb.lsi.com/KnowledgebaseArticle16570.aspx -Andrew -------------------------------------------------- Andrew Boyer aboyer@averesystems.com
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