Date: Wed, 25 Mar 2015 00:12:55 +0530 From: Shehbaz Jaffer <shehbazjaffer007@gmail.com> To: Michael Jung <mikej@paymentallianceintl.com> Cc: FreeBSD FS <freebsd-fs@freebsd.org>, "freebsd-hardware@freebsd.org" <freebsd-hardware@freebsd.org> Subject: Re: Zoned Commands ZBC/ZAC, Shingled SMR drives, ZFS Message-ID: <CAPLK-i9440WeVHim=xp=kW3sFRRfh%2BLQDsiTrsVCp3TsESiP7g@mail.gmail.com> In-Reply-To: <9C91F97841BC4347910F206618BAA3BB096D453FB6@PAIMAIL.pai.local> References: <CAD2Ti2_kQhnDL9nvdCT-zMG1bPeLSqTHemn%2B9hueRDLotmsLmw@mail.gmail.com> <CAPLK-i9OSv4ng-6Bwqc%2Byne%2BimDx_veOkwZij=hC1jLrE_ZUJw@mail.gmail.com> <CAFHbX1KLSuES8rJ1Nzho7g8kj-mD_vRAuCyYvdEK9xpz49QBZA@mail.gmail.com> <02F3A553C174554DA1D5EC7CEE9BDDD7011BC3E42B@loki.lvc.com> <5511A204.7020705@internetx.com> <9C91F97841BC4347910F206618BAA3BB096D453FB6@PAIMAIL.pai.local>
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> 'host aware' or 'host managed' SMR drives open the real possibilities for use under ZFS and other file systems. Agreed. Probably RAID is not the way to go then. In host managed SMR drives one could use other form of resiliency (Erasure Codes) rather than RAID. We do not rebuild the whole disk but probably just a zone of a SMR drive in case of errors.
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