NetApp has asked one of their competitors, Coraid, to halt the sales of their EtherDrive Z-Series NAS appliances. The reason? Coraid is using the ZFS file system. Coraid has sent a letter to their customers announcing a temporary sales stop. The Z-Series NAS was announced in May, so NetApp didn’t waste any time in sending their legal threats. Continue reading Battle over ZFS heats up
Do you every worry that data you just saved to disk might be corrupt? No? You’re not alone. Still, this is a risk that is always there, even in the most advanced storage system. Your hard drive won’t always tell you if it’s unable to write data, and by the time you’re reading it back you’re too late. And what about the cache memory in your operating system, and possibly your RAID controller(s)? Ever thought about what happens to that if you have a power failure, or some of the memory fails? Continue reading Have you ever worried about Silent Errors?
Chris Mellor from the Register noticed a post on Sun’s blog about Triple Parity RAID (RAID-TP) being added to ZFS. This is a rather logical extension of the current RAID-5 (single parity) and RAID-6 (dual parity, also known as RAID-DP) schemes, and the Sun engineer that wrote the blog post says the performance should be nearly identical to RAID-DP as far as the necessary parity calculations are involved. Continue reading Does the world need Triple Parity RAID?