Good RAIDs don't have the write hole issue. This includes mdadam, GEOM, Intel FakeRAID and good hardware RAIDs.
Unfortunately, this is not true - the only option to prevent write hole issue is using battery backup - which is possible only with very good hardware RAIDs.http://www.raid-recovery-guide.com/raid ... -hole.aspx
Silent data corruption does happen, but not on hard drives.
Unfortunately, this is also not true.http://www.necam.com/Docs/?id=54157ff5- ... 1cf2cb27d3
The chance that a drive will miss an error that ZFS would catch is in the realm of "mathematically impossible".
Again, not true.http://www.zdnet.com/blog/storage/data- ... u-know/191
and if the blog post above is not verbose enough check this one:http://queue.acm.org/detail.cfm?id=1866298
I'm not in any way saying ZFS is bad, just that some of it's features are overblown. If you are worried about data corruption, ZFS will not help you in 99.9% of the cases. You need something above the filesystem for that.
Yeah, obviously with some effort you can get most of the features that ZFS provides. You can use hardware RAID with redundant power source to avoid the write hole issue. You can use a good modern filesystem with checksums to identify silent data corruption. You can use LVM or dynamic disks (or how is it called in Windows) to overcome partitioning problems.
The thing is that with ZFS you have all these features 'out of the box', with some additional benefits and very
I have personally experienced a very simple problem: on RAID1 (two disks mirrored), one chunk of data on one disk got damaged. RAID could not tell which disk holds correct data, so the read process failed. These are the kind of problems that RAID does not solve. And this would never happen on ZFS mirror, because it integrates hardware redundancy with filesystem checksums.
I am not saying that ZFS is the only possible solution, but it is really feels like a different world. Once I have tried, I never looked back.
The Q1900B-ITX is on stock in Czech already (http://www.agem.cz/Default.aspx?content ... d_id;42400
) seems to me ASRock already started the shipment. Price is around 72 Euro
It's the 'B' version, available since a few weeks if I recall correctly.