NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
XRAID2 vs RAID6, etc.
I've got an RN104 on the way and I'd like to better understand my configuration options. To start with, I have to admit that I'm planning on using 3x2TB Caviar Greens to start with (WD20EARX); I kn...
Teracopy can verify, and I usually have it do that when I am copying to the NAS. Though of course if there is bitrot on the source machine's hard drive, a similar scenario still exists.
Having the CRCs on another device helps detect problems, which is useful even if you can't repair. At least you know what you lost. I use SFV files for that in my media folders - there's an SFV file in every folder, which checksums the media files (but not jpg artwork, info files, etc). I have a separate copy of the SFV files in a different share, and both are backed up.
It is a tough problem, and there have to be failure modes I missed. Some might be worse than the ones I listed (like losing the ext superblock). The good news is that the tech is quite reliable, so the failures are ultimately manageable even if there is some pain involved.
BTW There are some network coding techniques that are like RAID on steroids that apply to disk storage as well. There are some deployments, but I think it is still early days. Basically you can have as many parity blocks as you like (going far beyond RAID-6). There are a lot of potential applications (including dramatically speeding up networks that suffer packet loss). One of them is dispersing your parity blocks over multiple devices (disks or even servers) allowing you more repair options. Pretty cool stuff.
Here's a fairly recent article: http://www.networkworld.com/article/234 ... peeds.html.
And http://www.codeontechnologies.com/
Having the CRCs on another device helps detect problems, which is useful even if you can't repair. At least you know what you lost. I use SFV files for that in my media folders - there's an SFV file in every folder, which checksums the media files (but not jpg artwork, info files, etc). I have a separate copy of the SFV files in a different share, and both are backed up.
It is a tough problem, and there have to be failure modes I missed. Some might be worse than the ones I listed (like losing the ext superblock). The good news is that the tech is quite reliable, so the failures are ultimately manageable even if there is some pain involved.
BTW There are some network coding techniques that are like RAID on steroids that apply to disk storage as well. There are some deployments, but I think it is still early days. Basically you can have as many parity blocks as you like (going far beyond RAID-6). There are a lot of potential applications (including dramatically speeding up networks that suffer packet loss). One of them is dispersing your parity blocks over multiple devices (disks or even servers) allowing you more repair options. Pretty cool stuff.
Here's a fairly recent article: http://www.networkworld.com/article/234 ... peeds.html.
And http://www.codeontechnologies.com/
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
