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Got some IronWolf SSD 1.92 TB drives. If I partition them with one partition I can get over 600MB/sec read and write. If I partition them in two or four partitions the read write goes down to approx 300MB/sec. I have them in usb 3.0 or 3.1 docks. What is it about more than one partition that cuts the data rate in half? Clearly applying HDD logic isn't correct with SSDs.
I also found that even a cheap enclosure from Fry's that says it's for 2.5 inch HDD or SSD drives won't work for the IronWolf. I saw one enclosure that said it had a 1TB limit but the one I got did not say anything about that. I even tried partitioning the IronWolf into two partitions smaller than 1TB and still it wouldn't mount using the 2.5 inch enclosure. I have been told that some enclosures won't work with SSDs but the ones I'm trying now say specifically on the label HDD and SSD. Perhaps the one that didn't mention it was limited to 1TB might still have that restriction?
A part of me started to understand why creating two partitions resulted in half the data rate but then why didn't creating 4 partitions result in 1/4 the data rate? I clearly am missing some under the hood aspect of SSDs and perhaps their incompatibilities with various enclosures and their chipsets.
Where's a good ByteMonkey when you need them. Jimmy Dutt come out of hiding and help me. ;-)
John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net
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