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Sorry, I meant allocation units. NTFS default is 4KB. I think 64KB is the highest you can go unless you format the drive with GPT instead of MBR.
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Yeah, they do drop, but minimum speeds and average speeds will still be higher than green drives (estimate +10~20MB/s). Granted not all green drives perform the same. The Seagate Barracuda LP 2TB performs very close to the Seagate Barracuda 7200.11 1.5TB making it my choice for an upcoming unRAID server upgrade.
From some posts in the unRAID forums, parity check of green drives (the WDxxEACS and WDxxEADS in particular) finish at 65MB/s average or around 6 1/2 hours with 1.5TB drives. Those with 7200RPM drives get 85MB/s or less than 5 hours with 1.5TB drives (assuming no other bottleneck is in place). While I don't really mind the 6 1/2 hours (I'm sleeping during that time), now that we have 2TB drives, that same 65MB/s will equate to 8 1/2 hours. Someone will already be awake before the server finishes parity check and I'd rather not have anyone reading from/writing to the array during that time.
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Definitely more than sufficient. Again, I'm using a 2.5" 5400RPM notebook drive for my HTPC and that's even slower than 3.5" green drives.
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Should be heck fast. Tom's Hardware did a RAID-0 of 16 Intel 64GB Enterprise SSD's (1TB total) and got 3.4GB/s throughput. Now, just gotta rob a bank to afford a similar set-up...
















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