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It was confirmed here - http://arstechnica.com/civis/viewtopic.php?p=22587440#p22587440 - by IntelEnthusiast (who verified it internally @ Intel) that the combination can work. So at least the potential is there. (Assuming you are running a C20X series chipset)

Raid-5 is a red herring. You should be running Raid-6/Raid-Z2 with large 2TB + disks anyway. If we are only talking 2-3TB of data then sure, just mirror it with two drives - but assuming we are talking multi disk arrays just run 2 parity disks and you will be fine.

Multiple parity drives. With Raid-6 or Raidz2/z3 and reasonably sized pools (8-10) drives your chance of actually loosing data are pretty miniscule (you are probably more likely to be robbed). As for monitoring - an email letting you know there is a problem should be supported by just...

No, not 20TB, but I do have 12 256gig micron SSD's running a 1.5TB pool (all 2-way mirrors) as a VM host datastore. Your original post said "Given a example of a 2T Pool, VMWare use case". If that *isn't* representative of your requirements/setup why did you bring it up? But...

I wouldn't neccecarily agree with that - for typical VM hosting I find that SSD's actually scale reasonably well - and excellently when you take performance into consideration. Bulk VM storage requirements aren't really that great - and as long as you keep your bulk data out of the VM image...

I have two of these: http://www.addonics.com/products/mst.php with the Infiniband mutlilane card connected to an PERC H200 (sas 2008 chipset) via 2 CX4 <-> SFF-8087 cables. You could do the same with a IBM M1015. It was the cheapest way I could find to get 8 full speed external ports...

Install a drive in the desktop, share it out, and backup laptop to the share? That's probably going to be the cheapest option. If sleep status is an issue you can probably configure wake on lan, or schedule a wakeup timer.

Thanks - hadn't actually caught that portion of it - so in practice it becomes similar to drive extender in whs2003 (though the implementation is different). I expect it's also doing some sort of dynamic relocation on the back end to "balance" the drives when you add a new drive (otherwise you...

I'm a bit confused - if you start with a 2 way mirror, then add a third drive, and it's *not* a parity setup, what exactly is it? (assuming we are protected from any drive failing).

2 of the 16i LSI cards would give you 32 ports for < 800. That's not to say the expander can't work - it should - but I would go with native HBA's just to cut down on the variables (just an opinion of course though)

The DD identification method works if you have individual disk activity lights (norco cases, etc.) -- if you don't just reference via the serial number on the disk (at least that was the easiest way for me). Yep, napp-it supports sending email alerts on errors - look under the jobs tab.

I would replace the SAS expander with 2 flashed m1015's, or one LSI 16i (16 port) cards (http://www.newegg.com/Product/Product.aspx?Item=N82E16816118142 ) - depending on how many PCIe slots you have available. The 2 flashed m1015's are probably cheaper than the expander card anyway - and you...

It hardly seems worthwile for a 2TB pool - that's small enough that you could easily put together a pool comprised of, say, 256Gig crucial M4 SSD mirrors (~6000 dollars for 16 drives gives you 2TB usable with 8 mirrors). At that point the performance you get is going to tremendously...

Windows 8 is a pretty significant change, so there will be some relearning there as well. That said, it looks like you should be fine as long as you stay away from the parity spaces. Run mirrors (multiple 2 disk mirrors) all in the same "space" - should be equivalent to raid10 (though it looks...

From a point of view of someone not involved in the discussion it appears to me that the issue/position is more fundamental than that - * Has oracle uncovered and fixed "the problem" ** This really requires someone who could reproduce the problem previously to now run Oracle 11 and see if...

As far as identifying disks, if you don't have a case/enclosure that supports the activity lights (to use the DD method) - the latest versions of napp-it do a good job of identifying the serial number of the disk (you have to run the smart monitoring part at least once - after that it seems to...

If you want to buy and not build go with a QNAP/Synology which meets your number of drives and performance requirements. Check out the charts at smallnetbuilder.com to see the performance of the various units.

I expect the "1Gig/1TB data" figure is someone ballparking a ~1:2.5 dedupe ratio - so the "1TB" is only taking up 400GB of space - the "1TB of data" is "1TB of undeduplicated data, or 400GB of unique data". Not saying it's right or correct - but at least it get's people considering the...

That's per TB of unique data I think - so it would only take 2.5gigs if you achieved no deduplication.

Is this just a one time thing? Just mount an SMB share in windows and drag the files to your USB 3.0 drive. 3TB at 1GbE speeds should take just under 9 hours. But it it's a one time thing just fire it up and let it go. If you are worried that you are somehow going to introduce subtle...

I wouldn't use SATA drives behind a SAS expander - Nex7 has a good writeup here in another thread on it - but suffice to say there are plenty of issues. If you aren't PCIe slot limited you can add M1015's for however many drives you need - if you are LSI has a 16 port hba.

No worries - and yeah, the is/isn't broken distinction almost comes down to a semantics argument. I would say it's "functionally broken" when your dedupe table has to swap to disk. It's kinda like a car with a 5mph speed limiter - sure it works, but not really :). But if you are planning on...

Dedup isn't broken, it just has some significant caveats. These caveats are *especially* applicable to people running in home server type setups (lower memory, no l2arc, not a significant candidate for dedupe datawise, etc.) - so you tend to see statements that would be hyperbolic in other...

If I already had a case and power supply I would probably do the supermicro + i3-2100 (or 2100t if you want to go low power). The microserver is a killer value, but part of that value is the case, hard drive slots, etc. If you don't need/value those then I suspect the i3-2100 is going to...

Backup & docs stored on a local ZFS box (Solaris) + crashplan family plan for all my computers + solaris servers (9TB) - took about 3-4 months to upload everything. I <3 crashplan.

WD Green drives have other issues besides whatever hardware raid incompatabilities there are though. I have a larger drive ZFS box, and setup one for a friend also. He had 5 2TB Green drives from a previous WHS setup (running ZFS now). So a total of 15 Hitachi 5k3000 drives and 5 WD...

Qnap 8-bay system with redundant power supply is still going to run you 3x your budget + http://www.ebay.com/itm/QNAP-TS-809U-RP-Turbo-NAS-Storage-Array-2U-/180695148524#ht_500wt_1202 on ebay - 1500 USD. I will be really surprised if you can fulfill the redundant power supply option for 500...

You will have to go used, and still will be tough. The things that's going to kill you is *8-12 hotswap bays *redundant power supplies that's going to move you into a pricier bracket unless you happen to find a cheap pull on ebay. For instance...

40-60MB/sec over 10GbE? I would 1) Export a share from a drive not on the Areca and see what kind of performance you get there (yeah, you did this with the ram disk - but it would be nice to run the share through the sata subsystem as well) 2) Try connecting over a 1GbE connection without any...

Yeah, my Hitachi 5k3000's use WAYY more power than my WD Green's. ... That's because the WD Green's spend most of their time in a box being RMA'd Viva "advanced technology"!

Dupe

Make sure you get the 120mm fan bracket and some of the quieter 120mm fans and it's actually not very loud at all. http://www.ipcdirect.net/servlet/Detail?no=258

Well, that 500 MB/sec is about what you can get out of 2 PCIe 1.0 lanes or 1 PCIe 2.0 lanes. But that seems like a really low number of lanes to be run to a 8x slot (I assume that's what the card is?) Might be worth verifying though.

Ugh. I have 10 2TB disks and I've had 2 of them die. That would have been 20% of my data lost. Sure, some stuff I could probably re-create (dvd's I ripped, etc.) - but recorded TV shows, documents, backups for the computers, etc. would all be gone. And even for the stuff I could re-create -...

Not that it's easy to convert, but if you were doing this from the ground up wouldn't it be better to have 2x raid-z3's instead of 2x raid-z2's + 2x hotspares? since it would be the same number of drives?

Before you completely blow away the system you could try booting off of a live CD (OI or Solaris) and seeing if the issue repeats itself. Also if you have any older boot environment snapshots (beadmin) you could try rolling back to one of those.

I believe the write caching option here is just enabling the write cache on the hard drives, no? I think in most setups these will be enabled by default - having them disabled isn't common?

Yep, I can confirm using smartctl will present as S/W errors under iostat (typically 1 per invocation) - the current versions of napp-it I think warn about this in the web dialog.

I don't think there's an expander in the backplane of the 4220's - they are just being used to bundle 4 SATA cables together, not to provide any switching - it's just a cabling convienence. (i.e. you still need one HBA port per disk). You mentioned this later in your post: But I...

It should work fine with drives up to 3.2TB ref: http://forums.overclockers.com.au/showthread.php?t=958208&page=316 (so 4TB drives are a no-go). You probably can't boot off of 3TB drives, but you can run them as data drives without issue.