Viewing profile — jspiros

Very cool. I wrote up a spec very similar to this (though I just used the hash itself for the folders, as in HA/HAS/HASH structure [there's probably a name for that scheme]), but h…

I hate hierarchical filesystems. A lot of my older files, sadly, are stored in "SORT/Sort Me/To be sorted/Old computer/Sort again/Miscellaneous..." and the like. My server has an m…

My HBA is an LSI 9207-8e ( http://www.lsi.com/products/host-bus-adapters/pages/lsi-sas-... ) and my two SAS expander chassis are NORCO DS-24E ( http://www.norcotek.com/item_detail.…

It's not pool-wide, it's vdev-specific. You can add new vdevs with more optimal ashift values. With my pool, half of the vdevs have sub-optimal ashift, the other half are good.

Yeah, my oldest vdevs were configured with 512B block size, because that was the default and the ZFS community wasn't being particularly loud about ashift=12 being a good idea unti…

If you haven't seen it, you might find it interesting: http://research.google.com/archive/disk_failures.pdf

Almost all of the bitrot I see is on the oldest vdevs, which at this point probably contain mostly only old snapshots that are almost never accessed. My oldest vdevs are... 4-5 yea…

I'll keep that in mind; I do sometimes find myself with some time to play with things. :)

Yes, I should, and someday I will. I'm playing it fast and loose right now. :-p

My understanding is that some significant (thousands of bytes) silent corruption is inevitable when you start reaching huge capacities over long-ish periods of time; even cosmic ra…

Well, if you don't get a kick out of "tweaking and worrying", yes, I definitely recommend FreeNAS. Although I'm confident in my system now, it took a long time to get this way, and…

As far as I'm concerned, the most identifiable characteristic of Debian is the packaging system, dpkg/apt. I've used FreeBSD occasionally, and that's what I always end up missing a…

I only have 32GB of RAM for ~73TiB under ZFS management, so I have huge SSD cache devices in my pool. The cache devices really lower ZFS' need for RAM, and it works well for me. Be…

ZFS still protects you from bitrot when compared to ext4 over mdraid. When you get to many terabytes of data, it's almost guaranteed that you're going to lose something to bitrot. …

It means I ran a scrub that completed on February 21, 2014 after almost 202 hours, and there were no errors, but there were some corrupt data blocks that were repaired from mirrors…

By "something like this", do you mean ZFS? I am a HUGE fan of ZFS, and I do think that it's worth using in any situation where data integrity is a high priority. As far as ZFS on L…

As you can see, I do not perform scrubs as often as I should. Until I switched to SAS a year ago, I wasn't able to complete a scrub at all. The scrub you see is one of the few I've…

I've got some external hard drives that I rotate in and store off-site but still nearby (down the street) for some data. I also have constant online backups running to various loca…

I've got some external hard drives that I rotate in and store off-site but still nearby (down the street) for some data. I also have constant online backups running to various loca…

I'm in Ohio, where it apparently averages around 0.11USD per kWh, so probably closer to ~320USD here.

~330 watts.

I haven't experienced ANY drive failures. Which means I'm probably on track for one soon... When I started out, I began with a single 5-disk vdev using a SATA port multiplier enclo…

It is running 24/7; I don't feel comfortable powering it down regularly; that is something I would worry about from the OP's setup, I wouldn't want to subject all those mechanical …

I have a similar capacity solution running at home, though I have far more (fewer disks per) vdevs. I've been running it for a few years now, so some things aren't as optimized as …

Huh, here I am using iTerm2 every day and I didn't realize it had support for this. Fantastic.