Date: Thu, 4 Nov 1999 17:31:17 -0500 (EST) From: Kelly Yancey <kbyanc@posi.net> To: Greg Lehey <grog@lemis.com> Cc: freebsd-fs@FreeBSD.ORG Subject: Re: feature list journalled fs Message-ID: <Pine.BSF.4.05.9911041728260.20726-100000@kronos.alcnet.com> In-Reply-To: <19991104170819.58641@mojave.sitaranetworks.com>
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> > Then only parity would need to be recalculated. It only doesn't work > > with RAID 5 because the data is supposed to be distributed uniformly > > across the disks, so restriping is required. > > Well, no, you've missed the point: with the exception of the first > stripe, *all* the data in the plex needs to be reshuffled, whether > you're doing RAID-4 or RAID-5. > > Greg Hmm. Yes, I suppose maintaining the location of data on the disk might be important :) [ looking for dunce cap ]. The new space would have to appear at the end of the volume, not scattered throughout it's internals :) Kelly -- Kelly Yancey - kbyanc@posi.net - Richmond, VA Director of Technical Services, ALC Communications http://www.alcnet.com/ Maintainer, BSD Driver Database http://www.posi.net/freebsd/drivers/ Coordinator, Team FreeBSD http://www.posi.net/freebsd/Team-FreeBSD/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
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