Hi, > ----- Mail original ----- > De: "Matt Garman" <matthew.garman@xxxxxxxxx> > À: "L. M. J" <linuxmasterjedi@xxxxxxx> > Cc: "Mdadm" <linux-raid@xxxxxxxxxxxxxxx> > Envoyé: Mardi 27 Mai 2014 21:16:08 > Objet: Re: Which RAID do you recommend for home use? > How big are the drives? What are your goals? Any performance requirements? Got 3 TB drives. My goals : tolerate a drive fail, most important stored data : family pictures! Performance requirements : not the main target Got backup : Yes, on a USB drive and on LTO2 tape (yes, for home use !) For home use and "mostly static data", raid-10 is probably not what you want. If you are using RAID as a proxy for real backups, more redundancy is better than less, so I'd buy another drive and go with RAID-6. Also consider, if these are large (>2 TB) consumer-grade drives, then rebuild times will be quite long. During rebuild, your drives are stressed heavily, so the possibility of failure goes up considerably. Again, more redundancy is your friend. On the other hand, if you have real backups, and can tolerate the downtime, RAID-5 is probably adequate. Sound like RAID5 is still the way to go for me then ! Depending on your particular needs, there are another couple possibilities that might interest you: snapraid - http://snapraid.sourceforge.net/ - like raid-5 or raid-6 (I believe it now supports even more levels of parity), but not in "real time". The idea is that your data is mostly static (think large media collection), so it doesn't make sense to have extra drives spinning all the time for on-the-fly parity calculations. Just update your parity data as-needed (either by hand or e.g. nightly cron job). zfs - http://zfsonlinux.org/ - arguably a "competitor" to linux md, it does provide "raid-z3", which is zfs's branding for triple-parity raid (zfs raid-z1 is basically raid-5, raid-z2 is effectively raid-6). Gives you a little more protection if you're going without backups. I would like to stay on basic md array, to be able to rebuilt it from a sysresccd or so... Thanks ! -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
