Date: Fri, 19 Nov 2010 03:40:36 -0700 From: "Peter" <fbsdq@peterk.org> To: "Andy Wodfer" <wodfer@gmail.com> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: FreeBSD and large harddrives Message-ID: <8edd28e167e5e4e6c525936400dbc892.squirrel@pop.pknet.net> In-Reply-To: <AANLkTikJ7J11my65-zUw2P-7uACtOjM7m=9Jncq7e-s%2B@mail.gmail.com> References: <AANLkTimh50XGrXraNzBCeY9mZj3wsWPG=RRkRiF_fRf=@mail.gmail.com> <4CE52F49.4010602@sentex.net> <218D523D-A5BF-4E37-BC75-2FBF67C1D618@mac.com> <AANLkTi=-xfMZ7cVXmEZMt21C9LE5JGqmaby5%2B3ieQDX3@mail.gmail.com> <15996e2cfb833e0ed3fa9d19725b3a95.squirrel@pop.pknet.net> <AANLkTikJ7J11my65-zUw2P-7uACtOjM7m=9Jncq7e-s%2B@mail.gmail.com>
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> On Fri, Nov 19, 2010 at 9:30 AM, Peter <fbsdq@peterk.org> wrote: > >> I tend to stay away from raid cards. With ZFS pools all you need is ZFS >> and any OS [easily move drives around servers], vs. raid cards have to >> be >> the same if moving/replacing/card fails. >> >> With 'ZFS: do not give it all your HDD' >> [ http://www.freebsddiary.org/zfs-with-gpart.php ] >> You don't even need to have drives that are exactly the same. >> >> Completely not tied to any hardware.... >> > > Wow! I'm learning more and more and I'm really beginning to like ZFS! > > Question: What happens if 1 drive out of say 4 fails in a pool? And what > about hotswapping a (faulty) drive? Is this still possible with ZFS? Can I > actually replace a Raid 5 setup with a ZFS settup and have the same data > security if drives fail?' > > Cheers, > Andy Easily can be done. zpool mirror on a desktop, I recently just did a 'zpool offline' one of the drives, unplugged it from my sata port, plugged in another drive, and put it into the pool - all with desktop running. No esata, just cheap sata controller [biostar mobo] with AHCI enabled in BIOS and loader.conf. [My version of cheap esata and "offsite backups"] Make sure to use labels when adding drives to pool. With gpart labels, I can plug a drive into any port and FreeBSD/ZFS will pickup the label and no need to worry about putting drives into correct port/controller. You might want to try raidz instead of raid-5, but I've no experience with that except for what I've read. [ http://en.wikipedia.org/wiki/RAID-Z#RAID-Z ] ]Peter[
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