Date: Wed, 19 Feb 2014 10:11:11 +1100 From: andrew clarke <mail@ozzmosis.com> To: freebsd@fongaboo.com Cc: questions@freebsd.org, Eitan Adler <eadler@freebsd.org> Subject: Re: ZFS on Hardware RAID controller Message-ID: <20140218231111.GB90045@ozzmosis.com> In-Reply-To: <alpine.BSF.2.00.1402181717580.4903@helix.wtfayla.net> References: <alpine.BSF.2.00.1402111550250.5347@helix.wtfayla.net> <CAF6rxgku91Rz037H-rpBCzc9G5bu5=KOiAm1Wms3%2B1Xcz%2BJjtQ@mail.gmail.com> <alpine.BSF.2.00.1402181717580.4903@helix.wtfayla.net>
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On Tue 2014-02-18 17:27:52 UTC-0500, freebsd@fongaboo.com (freebsd@fongaboo.com) wrote: > When we spoke, you noted that when installing ZFS on multiple disks > connected to a hardware RAID controller, it is best to config it to JBOD. > > I tried to explain this to a colleague, but they were skeptical. Would you > (or anyone) be willing to give me a one or two line sales-pitch on why one > should abandon traditional notions of RAID performance in favor of > allowing ZFS to do disk management? Without JBOD, the hardware RAID appears to FreeBSD as a single disk. There is little to nothing to be gained from running ZFS on a single disk. Without JBOD, should a disk in the RAID fail, "zpool status" won't be able to tell you which one. Regards Andrew
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