Date: Fri, 31 Jul 2009 08:10:51 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Grzegorz Danecki <g.danecki@gmail.com> Cc: questions@freebsd.org Subject: Re: gmirror on different disks Message-ID: <6201873e0907310610x4c6e77d8n43ecca075475ad6d@mail.gmail.com> In-Reply-To: <41b95770907310324j397b5810v6793c9c314f8ce61@mail.gmail.com> References: <41b95770907310324j397b5810v6793c9c314f8ce61@mail.gmail.com>
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On Fri, Jul 31, 2009 at 5:24 AM, Grzegorz Danecki <g.danecki@gmail.com>wrote: > Hello everybody! > > I'm just wondering, I had gmirror with two disks: > > Master: ad0 <ST3160815AS/4.AAB> Serial ATA II > Master: ad2 <ST3160815AS/4.AAB> Serial ATA II > > unfortunately ad0 failed today, leaving me with degraded array and ad0 > offline. > > I did > > # gmirror forget gm0, then shutdown, ad0 was replaced with: > > ad0: 152626MB <Seagate ST3160815AS 3.AAD> at ata0-master SATA300 > > with different firmware I think. > > Then gmirror insert gm0 /dev/ad0 > > (...) > Jul 31 09:55:46 julia kernel: GEOM_MIRROR: Device gm0: rebuilding provider > ad0 finished. > Jul 31 09:55:46 julia kernel: GEOM_MIRROR: Device gm0: provider ad0 > activated. > > But the disk is a little bit smaller: > > 1. Name: mirror/gm0 > Mediasize: 160040803328 (149G) > Sectorsize: 512 > Mode: r5w5e6 > Consumers: > 1. Name: ad2 > Mediasize: 160041885696 (149G) > Sectorsize: 512 > Mode: r1w1e1 > State: ACTIVE > Priority: 0 > Flags: DIRTY > GenID: 1 > SyncID: 1 > ID: 3791030614 > 2. Name: ad0 > Mediasize: 160040803840 (149G) > Sectorsize: 512 > Mode: r1w1e1 > State: ACTIVE > Priority: 0 > Flags: DIRTY > GenID: 1 > SyncID: 1 > ID: 2477089776 > > # gmirror status > Name Status Components > mirror/gm0 COMPLETE ad2 > ad0 > > so, it looks fine. > > Can I expect any problems now because of different sizes? Any problems when > RAID will be almost full? > I mean - should I make the RAID once again with exactly the same drives, or > can I leave it as it is right now? > > Thanks in advance! > <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>; > Drives don't matter to gmirror as long as they are at least big enough. You may get better performance with identical drives however. -- Adam Vande More
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