On the ReadyNAS 3100 we did Netgear's proprietary X-RAID http://www.readynas.com/?p=214. From day1 we started with a 4-drive set. Recently when 1 drive was showing a potential failure, I bouoght a replacement, popped the old drive out and popped the new one in. The most time it took me was to find the rack it was in. I do agree 100% with JABR because we were both burned by a RAID5 failure on 2 different machines. Both ZFS and BTRFS have built-in functionality that will give you sufficient protection.
On 01/03/2014 09:41 PM, John Abreau wrote: > I'm not doing RAID separately. ZFS has the RAID-like functionality baked in > already. > > My personal opinion is that RAID-1 mirroring is more robust than RAID-5. More > expensive in terms of disk, but it's a genuine case of "you get what you pay > for". > > > Sent from my iPad > > On Jan 1, 2014, at 8:55 AM, Jerry Feldman <g...@blu.org> wrote: > >> Thanks JABR. In the context of a home NAS and the state of Linux and >> FreeBSD today where we have a number of viable choices. what would >> youall chose for a file system and redundancy: >> For example, ZFS, BTRFS, EXT[3,4], or other. >> Rely on file system for integrity, RAID1 (strictly mirroring), RAID5, >> RAID6, RAIDZ (ZFS) >> Since both ZFS and BTRFS check for problems is it really necessary for a >> home implementation to use these on combination with RAID, especially if >> you do frequent backups. >> >> >> On 12/31/2013 11:40 PM, John Abreau wrote: >>> Yes, it's ZFS. As I recall, there were two ZFS options; offhand, I >>> don't recall their names. One was a RAID-1 equivalent, and I believe >>> the other may have been a RAID-5 equivalent. I chose the RAID-1 >>> equivalent. >>> >>> And yes, I still use it. >>> >>> >>> Sent from my iPad >>> >>> On Dec 30, 2013, at 11:53 AM, Jerry Feldman <g...@blu.org >>> <mailto:g...@blu.org>> wrote: >>> >>>> I assume you are still using your FreeNAS system. What file system >>>> are you using, ZFS? >>>> >>>> On 12/30/2013 10:56 AM, John Abreau wrote: >>>>> Even if the MyBook Live turns out to be more reliable than I'd >>>>> expect, that doesn't negate the poor performance of the unit, >>>>> especially when it's accessed simultaneously by multiple clients. >>>>> With my usage patterns, that limitation is extremely noticeable. >>>>> >>>>> >>>>> On Mon, Dec 30, 2013 at 10:18 AM, Ken D'Ambrosio <k...@jots.org >>>>> <mailto:k...@jots.org>> wrote: >>>>> >>>>> On 2013-12-30 09:41, John Abreau wrote: >>>>>> After trying FreeNAS, I'd no longer consider the >>>>> consumer-level drives >>>>>> such the MyBook Live as serious options. >>>>> I think this stance is a little overly cautious; there is data >>>>> showing >>>>> that consumer drives don't fail at rates significantly different >>>>> than >>>>> "server-grade" drives -- e.g., >>>>> http://blog.backblaze.com/2013/12/04/enterprise-drive-reliability/ >>>>> (though I also remember studies done on significantly larger >>>>> datasets a >>>>> couple years ago, but they aren't leaping at me from Google). >>>>> What I >>>>> *have* found to be troublesome is that some RAID solutions don't >>>>> handle >>>>> drives that spin down very well. For this reason, I tend to >>>>> either go >>>>> with "server-grade" drives, or really do my homework, and find >>>>> drives >>>>> that work with the solution (e.g., 3Ware has -- or, at least, >>>>> had -- an >>>>> approved hardware list that I find useful). But I think that, >>>>> with a >>>>> suitable amount of caution, there's money to be saved here >>>>> without loss >>>>> of functionality or increased risk of data loss. >>>>> >>>>> $.02, >>>>> >>>>> -Ken >>>>> >>>>> P.S. One thing I should add here, just from a >>>>> hoo-boy-did-I-stub-my-toe >>>>> perspective: as a rule, I usually have my arrays use just a >>>>> leeeeetle >>>>> bit less than the whole disk. I had a large RAID-5 array once, >>>>> and one >>>>> of the drives failed. I got it RMA'd *with the same model >>>>> number* from >>>>> the manufacturer... and it was one sector smaller. THAT was >>>>> annoying. >>>>> >>>>> >>>>>> On Mon, Dec 30, 2013 at 9:05 AM, Mark Komarinski >>>>>> <mkomarin...@wayga.org <mailto:mkomarin...@wayga.org>> wrote: >>>>>> >>>>>>> On 12/30/2013 1:00 AM, John Abreau wrote: >>>>>>>> I tried a couple cheaper options such as the WD MyBook Live >>>>>>> network >>>>>>>> drive, but I wasn't really satisfied with them, They were >>>>> slow to >>>>>>>> access, slow to spin up when inactive, and had serious >>>>>>> performance >>>>>>>> issues when more than one process was accessing them over NFS, >>>>>>> which >>>>>>>> was the only filesharing option I used. They contained just a >>>>>>> single >>>>>>>> drive, which means no raid-1 safety net when the disk starts to >>>>>>> go bad. >>>>>>> After getting burned by non-NAS drives in a RAID 5 array, I'm >>>>> going >>>>>>> RAID >>>>>>> 1 for home use from now on. >>>>>>> >>>>>>>> Then I picked up an HP N40L mini cube server and installed >>>>> FreeNAS >>>>>>> on >>>>>>>> it, on a usb thumb drive that I plugged into the internal USB >>>>>>> port on >>>>>>>> the motherboard. It was the first NAS I've tried at home that I >>>>>>> was >>>>>>>> happy with.Performance is much better, even with multiple >>>>>>> processes >>>>>>>> accessing the unit, and large file copies both to and from the >>>>>>> unit >>>>>>>> seem to complete more quickly. >>>>>>> Ooh. I forgot about that little guy. Replacement for is seems >>>>>>> to be >>>>>>> the N54L. Fits 4 drives, might just get 2x4TB and leave the >>>>> other >>>>>>> two >>>>>>> for future expansion. >>>>>>> >>>>>>>> I'm currently using two of the four drive slots with a pair >>>>> of 2gb >>>>>>>> drives, configured with ZFS as a raid-1 mirror set. To properly >>>>>>>> support ZFS, I followed the recommendations in the HOWTO I found >>>>>>>> online and maxed out the RAM at 8 GB. >>>>>>>> >>>>>>>> It's been a couple years since I set it up, so I imagine there's >>>>>>> a >>>>>>>> newer model available by now that will accept larger drives and >>>>>>> more RAM. >>>>>>>> After trying FreeNAS, I'd no longer consider the >>>>>>>> >>>>>>> Err, you cut off there... >>>>>>> >>>>>>> -Mark >>>>>>> _______________________________________________ >>>>>>> gnhlug-discuss mailing list >>>>>>> gnhlug-discuss@mail.gnhlug.org >>>>> <mailto:gnhlug-discuss@mail.gnhlug.org> >>>>>>> http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ [1] >>>>> >> -- Jerry Feldman <g...@blu.org> Boston Linux and Unix PGP key id:3BC1EB90 PGP Key fingerprint: 49E2 C52A FC5A A31F 8D66 C0AF 7CEA 30FC 3BC1 EB90
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