Recent content by Silhouette

Ctrl-F "backup" not found in your post, does your friend have one? If yes -> restore to other drives/system (not the current one), verify that it isn't missing anything critical, and start over with that. If your friend has recent backups this will be the easiest/quickest solution. If not...

I'm not surprised, the btrfs raid 6 on my test server has failed every time I've tried to test some rebuild scenarios over the last few years. That said, the wiki warning was added fairly recently though and I know people who have lost data to these bugs.

The bigfoot drives were slower than 5400 rpm, at least the models that I owned.

Typical Areca firmware problem... Though it may also be caused by failing drives/bad cables/weak psu. Resetting the raid / adding the drives without a rebuild may lead to inconsistent data, for example in directory/file metadata. Rebuild if possible, and if you have a small set of very...

Preferably somebody with more recent experience with LSI raid controllers will help you. My recent experience with LSI is limited to HBAs. That said, RAID controllers will keep configuration data (like "this is drive X in a raid5 with id Y consisting of N drives") on the HDDs so that the raid...

The answers to pretty much all your questions depend on which controller (or software) you're using. BTW my first instinct when I have a drive failure at home is to make sure my backup is uptodate before I rebuild. Create a backup of your backup too if possible. If your backup covers 90-99%...

Backplane failures can have different effects. They can kill your drives or just disconnect them without any permanent damage.

I have 10 in a raidz2 on an res2sv240 expander connected to an lsi 9211 hba. I'm using them for storage of non-changing data. So far they have behaved very well, no problems with expander/hba compatibility. Speeds are good enough for me, I can transfer data at around 500 MB/s over 10GbE in both...

Since you are the one arguing against all research on and common sense regarding compression/deduplication of media files, I suggest you should be the one to prove your theory and not the rest of the world.

I rule it out. They did not solve P=NP and they can not dedupe media well.

Iostat numbers will be erratic even under normal circumstances, especially writes. You have a lot of RAM as well for caching so rereading the same files might not even show up at all on iostat. I have a system with similar specifications and testing the raw disk transfer rate is not so easy...

1.2 Gb/s or GB/s? 1.2 Gb/s on a 10GbE adapter is quite bad, you should be aiming for 9.x Gb/s. 1.2 GB/s on the other hand is about right under ideal conditions. For comparison my 10GbE linux boxes are capable of maxing out client SSDs while transferring large files to/from network shares. You...

Your reasoning is flawed. This is part research, part advertising and needs to be treated as such. 50x savings on media files... no, never. Unless you're storing 50 copies of the same exact file.

RAID10 doesn't magically remain unaffected by UREs. If one drive fails, and the mirrored drive has a permanent URE in an area where there is data you will have some data loss. RAID6 offers significantly more protection against data loss than RAID5. The problem with RAID5 is that you have no...

If you go with RAID10 and lose the "wrong" pair of drives you will sorely regret not using RAID6. On the flip side if you go with hardware RAID6 and use a controller that drops drives when it encounters UREs you could end up with a lot of work to recover the data if you're unlucky. I will agree...