April 21, 201016 yr I was about to buy a couple of the 2TB AV-GP drives, one for parity and another for storage. My 1TB versions aren't particularly speedy, but their temperature readings are so much lower I can't bring myself to care. However, it occurred to me that there might be enough of a performance hit on the parity drive that it would be worth giving up the lower temperatures. I can't find any authoritative posts on this, although it's early and certainly possible I've been staring at one blankly. Short version: are there good reasons for avoiding these sorts of drives for parity?
April 21, 201016 yr Short version: are there good reasons for avoiding these sorts of drives for parity? If all your other drives are GP drives, then you can keep your parity drive the same. Parity updates are as fast as the slowest drive in the write. Where it makes sense to use a faster parity drive is when you are doing multiple updates (writes) to various drives throughout the array, and/or you are doing torrenting on the array. Other then that it is not necessary.
April 21, 201016 yr give us a yell what you get writing files without cache. 7200rpm parity disks usually get your about 40-45MB/sec at the start of a data disk and around 30-35MB/sec at teh end of a data disk. ie when i copy 1.5TB to a new 2tb data disk it starts around 45MB/sec and by teh finish its oding about 30MB/sec (user share).
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